Denver International Airport (DEN)
Airport Overview
Denver International Airport (IATA: DEN, ICAO: KDEN) is the third-busiest airport in the United States and, by 2025, confirmed the sixth-busiest in the world, with a 2024 annual passenger count of 82,358,744 — the first year in the airport's history exceeding 80 million, and a 5.8% increase over the already-record 77.8 million served in 2023. An airport originally designed to handle 50 million passengers annually is now operating at nearly 165% of its designed capacity, spurring a massive "Vision 100" expansion programme targeting 100 million annual passengers and an "Operation 2045" plan to add four new concourses and 100 gates by that year. Situated 37 kilometres (23 miles) northeast of downtown Denver on the high plains of Colorado, DEN is the largest airport in North America by land area at 53 square miles (137 km²) — second-largest in the world — and is within clear sight of the Front Range of the Rocky Mountains, which inspired the airport's most defining feature.
That feature is the Jeppesen Terminal's iconic white fibreglass-coated Teflon tent roof — 34 translucent peaked canopies designed by architects Fentress Bradburn to evoke the snow-capped peaks of the Rocky Mountains. Opened on 28 February 1995, replacing the cramped Stapleton International Airport after running 16 months late and nearly $2 billion over its original budget of $1.7 billion, DEN has grown into one of America's essential aviation hubs. It is now the largest hub for United Airlines — surpassing Chicago O'Hare in 2024 — and the largest operating base for both Southwest Airlines and Frontier Airlines in the world. United holds 47.3% market share at DEN; Southwest 31.0%; Frontier 10.1%. The three carriers combined account for nearly 90% of all traffic, making DEN one of the most airline-concentrated major hubs in the United States.
Despite its overwhelmingly domestic character (94.4% of passengers in 2024), DEN's international network has been transforming rapidly: international traffic grew 15% in 2024 alone and was 46.2% above pre-pandemic 2019 levels, with new nonstop routes established to Dublin (Aer Lingus, 2024), Istanbul (Turkish Airlines, 2024), Rome (United, 2025), and Lufthansa's landmark deployment of the Airbus A380 on its Munich–Denver route from April to October 2025 — the first regularly-scheduled A380 service in DEN's history. The airport contributes $47.2 billion annually to Colorado's economy and employs over 40,000 people, making it the largest single employer in the state.
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Terminals & Gates
One Terminal, Three Concourses
DEN has a single passenger terminal — the Jeppesen Terminal — named after Elrey Jeppesen, the Colorado aviator who pioneered instrument approach charts. From this central hub, three departure concourses (A, B, and C) branch outward. All check-in, security, baggage claim, customs, and ground transportation functions take place in Jeppesen Terminal. All departure gates are in the concourses. The terminal is divided into two functional sides: the West Side (United Airlines and international carriers) and the East Side (Southwest, American, Frontier, and most other domestic carriers), though this division applies to check-in and baggage claim — not security.
Jeppesen Terminal — Levels
- Levels 1–4: Primarily parking garages on both east and west sides. Level 1 also contains the DEN Transit Center (A Line train station, SkyRide buses) accessible through the Westin hotel connector at the south end.
- Level 5: Baggage claim (east and west sides), Customs and Border Protection (international arrivals), ground transportation (taxis, Uber/Lyft, shuttles, rental car buses), limited dining, ATMs. The A Bridge pedestrian walkway to Concourse A begins at the south end of Level 5 (reopened 2025 as post-security shortcut after A Gate security checkpoint).
- Level 6: Main check-in and ticketing (east and west), TSA security checkpoints (West Security opened early 2024; East Security opened August 2025), access to the pedestrian bridge to Concourse A, dining and retail.
Moving Between Jeppesen Terminal and Concourses
The Automated Guideway Transit System (AGTS) — DEN's underground airport train — is the primary means of reaching all three concourses. Trains run continuously 24/7 in both directions, every 2–3 minutes, with a maximum journey time of approximately 10 minutes from Jeppesen Terminal to Concourse C. The AGTS operates within the secure area — you must clear security before boarding. Train boarding is on Level 4, beneath the terminal.
Alternative to the train — Pedestrian Bridge (Concourse A only): A covered bridge on Level 6 connects Jeppesen Terminal directly to Concourse A (approximately 5 minutes on foot, with moving walkways). This is often faster than the train for A gate passengers, particularly during peak periods when the AGTS can be crowded. As of August 2025, the reopened A-Bridge now serves as a dedicated post-security connection for A gate departures.
Concourses B and C: Accessible only via the AGTS. No pedestrian connection to Jeppesen Terminal.
Concourse A — International and Mixed Domestic
The most diverse concourse at DEN, handling all international flights plus a substantial domestic operation. Concourse A is also where all international arrivals clear U.S. Customs and Border Protection (CBP), regardless of which airline operated the flight. It spans approximately 4,000 feet (1,200 m) in length and has 50–60 gates (numbered A14–A84), including several double-jetway international gates. Gates A37 and A41 are Category F-capable (A380 and 747-8 rated) — gate A41 is the primary A380 gate used by Lufthansa for Munich service.
Airlines in Concourse A: Alaska Airlines; American Airlines; Delta Air Lines; Frontier Airlines (gates in A-East wing, ground-loaded tarmac gates); JetBlue; United Airlines (international arrivals and selected domestic); all international carriers (Aer Lingus, Air France, Aeromexico, British Airways, Copa Airlines, Edelweiss Air, Icelandair, Lufthansa, Turkish Airlines, WestJet, Air Canada).
Lounges in Concourse A: United Club (near gate A35 level 1); American Airlines Admirals Club (Concourse A); Delta Sky Club (Concourse A). Air France and British Airways passengers are eligible for their respective partner airline lounges at Concourse A.
Notable: The international terminal section in Concourse A is the only part of DEN with U.S. Customs and immigration facilities. International arrivals must follow "Arrivals" signs to CBP before collecting bags and exiting. Processing can take 30–60 minutes during peak international arrivals — particularly after simultaneous wide-body arrivals from Europe.
Concourse B — United Airlines Exclusive
The largest single-airline concourse in DEN, used exclusively by United Airlines for its massive domestic and international hub operations. With 72–74 gates (numbered B7–B92), Concourse B is DEN's busiest concourse by passenger volume — a reflection of United's 47.3% market share. The concourse is accessible only by the AGTS; there is no pedestrian bridge option. Three United Club lounges are distributed across the concourse (near gates B32 and B59, plus a United Club Fly lounge), making it one of the best-served concourses for United frequent flyers in the entire United network. Shops and restaurants run the full length of B, with a particularly strong concentration of local Colorado food and drink concepts.
Concourse C — Southwest, American, and Others
Concourse C is the primary home of Southwest Airlines (its largest base globally, with 40 gates), plus American Airlines, Spirit Airlines, Alaska Airlines, and other domestic carriers. It has 44 gates (C23–C67). Accessible only by AGTS. A Centurion Lounge (American Express) is located on the mezzanine — one of the most popular premium lounges at DEN, accepting Platinum Card and Centurion cardholders. An American Airlines Admirals Club is also in Concourse C.
Security
DEN underwent a major security reconfiguration in 2024–2025. As of August 2025: West Security (Level 6, north end — opened early 2024) handles West Side airlines (United and international carriers); East Security (Level 6, south end — opened August 2025) handles East Side airlines (Southwest, American, Frontier, etc.). The old North and South security checkpoints have been permanently closed. TSA PreCheck is available at both checkpoints. CLEAR biometric identity lanes are available at both. Budget at least 30–45 minutes for security during peak summer, holiday, and ski-season weekends — lines can exceed 45 minutes at both checkpoints simultaneously.
---Transportation Guide
Getting to and from DEN Airport
Denver International Airport sits 37 km (23 miles) northeast of downtown Denver via Peña Boulevard — a dedicated access road that connects directly to I-70 and I-270. Driving is the dominant mode of airport access for Coloradans, but the RTD A Line commuter rail offers a fast, direct, and affordable alternative to the city centre that completely bypasses I-70 congestion, which can be severe on ski weekends and summer holiday weekends.
RTD A Line — Commuter Rail to Downtown Denver
The A Line (University of Colorado A Line), operated by Denver's Regional Transportation District (RTD), is the fastest and most reliable transport option for passengers heading to or from downtown Denver. The line opened 22 April 2016 and connects DEN directly to Denver Union Station in Lower Downtown (LoDo) — the city's main transportation hub — in exactly 37 minutes, travelling up to 79 mph (127 km/h) with eight intermediate stops.
- Fare: $10.00 one way (as of January 2024; reduced from $10.50). Discount fares (50% off) available for seniors (65+), people with disabilities, Medicare holders, and qualifying low-income riders. Monthly pass: $88 (covers entire RTD network including airport trips).
- Hours: 03:00–00:30 daily; extra trip at 01:00 on Friday and Saturday nights. Frequency: every 15 minutes (04:30–18:30); every 30 minutes outside those times.
- Station at DEN: Denver Airport Station, located at the south end of the Jeppesen Terminal complex beneath the Westin Denver International Airport Hotel. Access via escalators/elevators from Level 1 of the terminal — follow signs reading "Transit Center" (not "Airport Rail").
- Key stops outbound from airport: 61st & Peña → Peoria → Central Park → 40th & Colorado → 38th & Blake → Union Station (Downtown Denver)
- At Union Station: Transfer to all other RTD light rail and bus routes; Amtrak (California Zephyr to Chicago and San Francisco); 16th Street Mall free shuttle (MallRide) to central hotels; free MetroRide buses through downtown; taxi/Uber/Lyft pickup.
- Luggage: Overhead storage racks and designated luggage towers in every car. Level boarding at all doors. Passengers must handle their own bags — train operators do not assist with luggage loading.
- Purchase: App (RTD MyRide), ticket vending machines on platforms (credit cards accepted), or inside the Westin hotel lobby. Validate before boarding — fare inspectors conduct random checks.
RTD SkyRide Express Buses
RTD operates four SkyRide express bus routes from DEN to various parts of the Denver metro area that the A Line does not directly serve. Buses board at the DEN Transit Center (same level as the A Line station). Fares are $10.00 (airport surcharge) for routes with airport stops. SkyRide buses have under-coach luggage storage and drivers assist with loading — useful for ski equipment and oversized bags. Key routes serve Boulder, Longmont, and suburban corridors not on the A Line. Schedules vary; check rtd-denver.com for current timetables.
Taxi
Official taxis operate from Level 5, Island 1 of the Jeppesen Terminal — outside Doors 505, 507, 511 (Terminal East) and Doors 506, 510, 512 (Terminal West), near baggage claim. Major operators: Yellow Cab Denver, Metro Taxi, Freedom Cab. All use regulated meters.
- To Downtown Denver (~37 km): approximately $55–70, 35–50 minutes in normal traffic
- To Boulder: approximately $90–110, 60–80 minutes
- To Colorado Springs: approximately $110–130, 90–110 minutes
- To ski resorts (Vail, Breckenridge, Keystone): $150–250+ depending on resort; mountain shuttle services often cheaper for shared rides
- Hours: 24/7
- Payment: Most accept credit cards; confirm before boarding
Uber and Lyft
Uber and Lyft are widely available and extensively used at DEN. Pickup is at Level 5, Island 5 — follow signs for "Ground Transportation" then exit through Doors 506–510 (west) or 507–511 (east) near baggage claim. Typical fares to Downtown Denver: UberX $35–55, Lyft $35–55. UberXL/Lyft XL for larger groups or ski gear: $55–80. Surge pricing can significantly increase fares during morning ski rush (Fridays, Saturdays 06:00–09:00) and post-flight delays when hundreds of passengers simultaneously request rides.
Shared-Ride Shuttles (Mountain and Regional)
Several companies provide shared van/shuttle service from DEN to mountain ski resorts and regional destinations — the most popular transport option for ski travellers:
- Estes Park Shuttle — Rocky Mountain National Park gateway
- Colorado Mountain Express (CME) — Eagle County/Vail, Summit County (Breckenridge, Keystone, Frisco), Aspen: $75–160/person shared, $200–350+ private
- Summit Express — Summit County ski resorts: $65–90/person shared
- Green Ride Colorado — Boulder: ~$35/person shared
Book mountain shuttles well in advance for ski weekends (December–March) and Thanksgiving/Christmas — they sell out quickly and rates rise with demand. Shuttles depart from Level 5, Island 4 (shared-ride van area).
Car Rental
All major car rental companies are consolidated in the Rental Car Center, located off the terminal complex and accessed by a free shuttle bus from Level 5, Island 3. Companies: Alamo, Avis, Budget, Dollar, Enterprise, Fox, Hertz, National, Payless, Thrifty. A convenient free connector also runs to the Westin hotel and the A Line station. Expect very high demand and prices on ski-season weekends (December–March) and summer peak (June–August) — book weeks ahead for those periods.
| Transport | Time to Downtown | Price (one way) | Hours | Best For |
|---|---|---|---|---|
| A Line (RTD rail) | 37 min (exact) | $10.00 | 03:00–00:30 | Solo / couple, Union Station area, speed, cost |
| Uber / Lyft | 35–55 min* | $35–55 | 24/7 | Groups, heavy bags, specific hotel drop-off |
| Taxi | 35–55 min* | $55–70 | 24/7 | Cash payers, immediate availability |
| Mountain shuttle (shared) | 60–120 min to ski resorts | $65–160/person | Scheduled departures | Ski travellers, Vail/Breckenridge/Aspen |
| SkyRide bus | 45–70 min | $10.00 | Scheduled, 24/7 some routes | Budget, Boulder, suburban connections |
| Rental Car | 30–50 min* | $40–120+/day | 05:00–00:00 typically | Road trips, mountain driving, ski gear |
*I-70 westbound is heavily congested on Friday afternoons/evenings and Saturday mornings heading to ski country; eastbound Sunday afternoon/evenings returning from mountains. The A Line bypasses all of this.
---Hotels Near the Airport
On-Site Hotel — Connected to Terminal
Westin Denver International Airport ★★★★★ — The only hotel physically connected to DEN, linked directly to the south end of Jeppesen Terminal (Level 1, adjacent to the A Line transit center). 519 soundproofed rooms, all with Colorado mountain views through floor-to-ceiling windows. Amenities: indoor heated pool, WORKOUT® fitness studio, multiple restaurants and bars, 27,500 sq ft of meeting space. Quiet despite the airport location — rooms are fully soundproofed. Day-use rates available for long layovers. The A Line station is literally inside the hotel lobby — ideal for early morning departures or late arrivals. From approximately $200–380/night (significant premium for convenience; rates spike during ski season and major events).
Near Airport (5–15 minutes, free shuttle)
Gaylord Rockies Resort & Convention Center ★★★★★ (Marriott) — Only 9 km (5.5 miles) from the airport, this is not a typical airport hotel — it is a full Colorado mountain resort with multiple pools (indoor/outdoor waterpark-style), 8 restaurants, a spa, and stunning Front Range mountain views. A genuinely compelling reason to extend a layover. Free shuttle to DEN. From approximately $250–500/night (premium resort pricing; often more economical than Westin for leisure guests). Address: 6700 North Gaylord Rockies Blvd., Aurora, CO 80019.
Hilton Garden Inn Denver Airport ★★★★ — 11 km (7 miles) from airport, 24-hour complimentary shuttle (10–15 min). Pool, fitness centre, restaurant. From approximately $100–200/night.
Embassy Suites by Hilton Denver International Airport ★★★★ — 8 km from airport, free shuttle, complimentary cooked breakfast and evening social hour (complimentary cocktails). Excellent value for families and business travellers. From approximately $130–230/night.
Hyatt Place Denver Airport ★★★ — Adjacent to 61st & Peña A Line station (first stop from airport). Walk-on A Line connection, no shuttle needed. Free complimentary breakfast. From approximately $90–160/night.
Courtyard by Marriott Denver Airport at Gateway Park ★★★★ — Reliable mid-range Marriott product near the airport. Shuttle, pool, restaurant. From approximately $100–180/night.
Fairfield by Marriott Denver Airport ★★★ — Budget-friendly Marriott option with shuttle and complimentary breakfast. From approximately $70–130/night.
Staybridge Suites Denver International Airport ★★★ — Extended-stay suites with kitchenette, free breakfast, outdoor grilling, shuttle. Good for longer layovers or road-trip staging. From approximately $80–140/night.
---Parking Options & Rates
Parking at DEN
DEN offers over 10 parking lots and garages across the campus, ranging from curbside drop-off to long-term economy lots with shuttle service. All lots are operated by the City and County of Denver. Payment: credit cards, cash, or the FlyDenver Parking app (pre-booking available online for discounts). Emergency vehicle services (jump starts, flat tires, lockout assistance) are free 24/7 — call (303) 342-4645.
| Lot | Distance to Terminal | Type | Approx. Daily Rate | Notes |
|---|---|---|---|---|
| West Garage | Connected via covered walkway | Covered, multi-storey | ~$28–35/day | Closest to West check-in (United, international). Most convenient, most expensive. |
| East Garage | Connected via covered walkway | Covered, multi-storey | ~$28–35/day | Closest to East check-in (Southwest, American, Frontier). Same pricing as West. |
| West Economy (Lot A) | Free shuttle, ~10–15 min | Open air | ~$17/day | Large remote lot. Shuttle runs 24/7. Best value for 4–14 day trips. |
| East Economy (Lot B) | Free shuttle, ~10–15 min | Open air | ~$17/day | East-side equivalent. 24/7 shuttle. |
| South Economy | Free shuttle, ~15 min | Open air | ~$17/day | Additional economy capacity, slightly longer shuttle. |
| Short-Term | Immediately adjacent | Covered/adjacent | ~$6/hour | Strictly for short visits. Very expensive for anything over a few hours. |
| Cell Phone / Final Approach Waiting Lot | 5 min drive to terminal | Open air | Free (waiting only) | Free waiting lot for passenger pickup. No time limit. Mandatory exit when passenger calls. |
| A Line Station Park-and-Ride | A Line ride to terminal | Open air | Free (RTD lots) |
Pro tip: For trips of 7+ days, parking at a free A Line station (especially Peoria or 40th & Colorado) and riding the train for $10 each way ($20 round-trip) is almost always cheaper than any DEN on-site parking option. The train also eliminates the shuttle wait and potential traffic stress on Peña Boulevard.
---Services & Facilities
The Tent Roof and Architecture
The Jeppesen Terminal's signature white tent roof — 34 fibreglass-coated Teflon peaks — was designed by Curtis Fentress of Fentress Bradburn Architects specifically to evoke Colorado's Rocky Mountain skyline. Visible from miles away across the flat eastern plains, the roof is simultaneously structural (it supports itself with tensioned cable networks rather than interior columns, allowing the enormous open floor areas below) and symbolic. Inside the Great Hall, the tent creates a cathedral-like space that has won major architectural awards. The ongoing Great Hall renovation (part of Vision 100) is gradually transforming the landside areas into broader commons spaces while relocating security to Level 6 — the original intended use of the Great Hall as a grand public gathering space is being restored for the first time since the airport opened.
WiFi
Free unlimited WiFi is available throughout Jeppesen Terminal and all three concourses. Connect to the "DEN-Free-WiFi" or "Denver International Airport" network. No registration required, no time limits. Speed is generally adequate for streaming and video calls. USB charging stations, standard 120V outlets (US standard), and USB-A/USB-C combination ports are distributed throughout all concourses and the terminal.
The Great Art Programme
DEN is internationally recognized for its permanent public art collection — one of the most ambitious in any US airport, with over 40 commissioned works throughout the facility. The collection ranges from the controversial to the beloved:
- "Blue Mustang" (Luis Jiménez, 2008) — The 32-foot cobalt-blue fiberglass stallion with glowing red eyes on the Peña Boulevard approach road. Officially titled "Blue Mustang" but locally known as "Blucifer" for its intense expression. The sculpture famously fell on and killed its creator during fabrication; he died before seeing it installed. One of the most Googled airport artworks in the world.
- Great Hall murals (Leo Tanguma) — Two large-scale murals, "In Peace and Harmony with Nature" and "The Children of the World Dream of Peace," dominate the main terminal walls. Their apocalyptic imagery (including hooded skeletal warriors, burning cities, and weeping children) generated intense public controversy on opening and remains a subject of internet conspiracy theories about DEN's alleged occult significance.
- Gargoyle sculptures (Terry Allen) — Bronze gargoyles in business suits in baggage claim, plus talking suitcases and spontaneous musical performances embedded in the floor.
- Concourse B murals (Gary Sweeney) — Humorous maps and paintings about travel, luggage, and American geography.
- Mustang/horse sculptures and Western art — Throughout the concourses celebrating Colorado's frontier heritage.
Dining
DEN's food and beverage programme emphasises local Colorado brands alongside national standards, with over 50 food and beverage locations across the terminal and concourses. Standout local concepts include:
- Root Down DIA (Concourse C): James Beard-nominated local restaurant; farm-to-table Colorado cuisine. One of the best sit-down restaurants at any US airport.
- Modern Market (various): Denver-born healthy fast-casual chain with strong vegetarian/vegan options.
- Elway's (Concourse B): John Elway's steakhouse concept — Colorado beef, classic American steakhouse.
- New Belgium Hub (Concourse B): Colorado craft beer bar (Fort Collins brewery).
- Snooze A.M. Eatery (Concourse C): Denver's beloved breakfast chain; pancakes and Benedicts.
- Chef Ryan Hardy (Concourse A, international): Upscale Italian-inspired dining for international departure passengers.
Standard chain options (McDonald's, Chick-fil-A, Starbucks, Chipotle, etc.) are in all three concourses. Prices are moderately elevated over street prices — expect to pay approximately 25–40% more than equivalent Denver restaurant prices.
Lounges Summary
- United Club — Concourse B (Gates B32, B59, plus Fly lounge): Three locations in B alone; United's flagship hub lounge experience. Hot food, showers at the main Club, extensive bar. United Business, Global Services, 1K, *A Gold, and day pass (~$59).
- United Club — Concourse A (near A35): International departures lounge. Showers, premium food and spirits.
- Centurion Lounge — Concourse C (mezzanine): American Express's premium lounge; excellent food, bar, and aesthetic. Access: Platinum Card and Centurion. Often crowded — arrive early or expect a wait.
- American Airlines Admirals Club — Concourse A and C: AA Business, AAdvantage Platinum and above, day pass (~$79).
- Delta Sky Club — Concourse A: Delta premium cabin + Delta Medallion Gold and above. Cannot be accessed by day pass purchase at the door.
- USO Lounge — Jeppesen Terminal Level 6: Free for all active duty, National Guard, Reserve, and immediate family members (with ID).
Shopping
DEN's retail programme spans all three concourses with a strong emphasis on Colorado-branded merchandise, outdoor gear, and local products. Highlights: Colorado Rockies, Broncos, Avalanche, and Nuggets team stores; REI Co-op (outdoor gear); Colorado's Best (local food gifts: Noosa yogurt, Celestial Seasonings tea, local craft beer six-packs); InMotion (electronics, headphones, phone chargers). Duty-free retail (primarily alcohol, perfume, and confectionery) is available in Concourse A international departures.
Accessibility
DEN provides comprehensive accessibility services. Electric carts are available in all concourses on request for passengers with mobility challenges. The AGTS train has level boarding at all doors and two wheelchair spaces per car. Elevators serve all levels throughout the terminal and all concourses. Wheelchair assistance is available by contacting your airline at least 48 hours in advance. Pet relief areas are located in all three concourses (airside) and on the landside curb area — important for long connections with service animals.
Luggage Storage
Luggage storage is available at the Baggage Storage counter in Jeppesen Terminal Level 5 (both east and west sides). Hours: approximately 07:00–22:00. Rates: approximately $10–20/bag per day depending on size. Useful for passengers with early arrivals and late outbound flights who wish to explore Denver or the mountains without carrying bags.
Medical
A medical clinic is located in Jeppesen Terminal Level 5. For emergencies: call 911 (US standard); dial 0 from any airport courtesy phone to reach airport security, who can summon EMTs. An AED (automated defibrillator) is posted at regular intervals throughout the terminal and all concourses.
Altitude Note
DEN sits at 1,656 metres (5,431 feet) above sea level — the highest major commercial airport in the United States by a substantial margin. Visitors from sea-level cities may experience altitude effects: mild headache, shortness of breath, fatigue, or dehydration, particularly in the first 24–48 hours. The effects are mild for most healthy people but worth acknowledging. Drink extra water (the dry high-altitude air accelerates dehydration), avoid alcohol on arrival day if heading to higher elevations (resorts like Breckenridge sit at 2,926 m / 9,600 ft), and allow a day to acclimatize before strenuous hiking or skiing.
---Airlines & Destinations
Hub Airlines and Major Carriers
United Airlines (UA — Star Alliance) is by far DEN's dominant carrier at 47.3% market share — approximately 38.9 million passengers in 2024, making DEN United's largest hub, surpassing O'Hare for the first time. United operates out of Concourse B (exclusively) and Concourse A (international arrivals and selected gates). Its DEN international network includes: London Heathrow (daily, 777-200ER/787), Frankfurt (daily, 787), Munich (daily, 787-9), Tokyo Narita (seasonal, 787), and seasonal service to Rome (2025). Domestically, United connects Denver to virtually every major US city with high-frequency hub service.
Southwest Airlines (WN) operates its single largest base at DEN, with over 25 million passengers in 2024 (31.0% market share) and 40 gates in Concourse C. Southwest offers extensive domestic point-to-point service plus popular leisure international routes to Mexico (Cancún, Puerto Vallarta, Los Cabos, Cabo San Lucas) and the Caribbean.
Frontier Airlines (F9) has its primary hub at DEN (10.1% market share, 8+ million passengers). Ultra-low-cost carrier operating from Concourse A-East (ground-loaded gates) to 70+ US destinations and select leisure international routes. No bag fees included in base fare — typically the cheapest headline fares at DEN for flexible travellers.
Key International Routes from DEN
| Route | Airlines | Notes |
|---|---|---|
| DEN – LHR (London Heathrow) | United Airlines, British Airways | Busiest European route; UA daily 777 + BA daily 777; top international market by pax (424K in 2024) |
| DEN – YVR (Vancouver) | Air Canada, WestJet | 2nd busiest international route (417K pax, 2024); strong ski/leisure market |
| DEN – FRA (Frankfurt) | Lufthansa, United Airlines | Double-daily combined (2×LH + 2×UA = 4 daily); 25 years of Lufthansa service as of 2026; 339K pax 2024 |
| DEN – MUC (Munich) | Lufthansa (A380 seasonal), United Airlines | Double-daily combined; Lufthansa A380 Apr–Oct 2025 (first A380 at DEN); 300K pax 2024 |
| DEN – CDG (Paris) | Air France, United Airlines | Daily combined; seasonal strength in summer |
| DEN – NRT (Tokyo Narita) | United Airlines | Seasonal (typically May–October); United 787-9; key Asia gateway for Colorado |
| DEN – IST (Istanbul) | Turkish Airlines | Year-round daily as of 2024 (expanded from seasonal); connects DEN to 300+ Turkish destinations |
| DEN – DUB (Dublin) | Aer Lingus | Inaugural 2024; seasonal (typically May–October); 4–7×weekly; A330 |
| DEN – FCO (Rome Fiumicino) | United Airlines | Inaugural May 2025; seasonal daily summer service; first nonstop DEN–Rome ever |
| DEN – KEF (Reykjavik) | Icelandair | Seasonal; popular stopover route to Europe; connects entire Icelandair Europe network |
| DEN – MEX (Mexico City) | Aeromexico, Volaris | Year-round; multiple weekly frequencies; growing Mexican-American community at DEN |
| DEN – ZRH (Zurich) | Edelweiss Air | Seasonal; sister airline to Swiss; connects DEN to Zurich hub |
Distances & Travel Times
Distances from DEN Airport
| Destination | Distance | By Car / Road | By Public Transport |
|---|---|---|---|
| Downtown Denver (Union Station / 16th St Mall) | 37 km (23 mi) | 30–50 min (I-70/I-25)* | 37 min (A Line, $10) |
| Denver Convention Center / 16th Street | 38 km (24 mi) | 35–55 min* | ~50 min (A Line + walk or MetroRide) |
| Denver Tech Center (DTC) | 40 km (25 mi) | 35–55 min* | ~60 min (A Line + Light Rail E/F Line) |
| Boulder | 65 km (40 mi) | 55–80 min (US-36)* | ~80 min (A Line + SkyRide AB bus) |
| Gaylord Rockies Resort | 9 km (5.5 mi) | ~10 min | Free hotel shuttle; or 61st & Peña A Line stop |
| Rocky Mountain National Park (Estes Park) | 120 km (75 mi) | ~90 min (US-36) | Shuttle service from airport; no direct transit |
| Breckenridge (ski resort) | 165 km (103 mi) | ~90 min (I-70 W)* | ~2.5h (A Line + Summit Express shuttle) |
| Vail (ski resort) | 185 km (115 mi) | ~100 min (I-70 W)* | ~2.5h (A Line + Colorado Mountain Express) |
| Keystone / Arapahoe Basin | 150 km (93 mi) | ~85 min (I-70 W)* | ~2.5h (A Line + Summit Express) |
| Aspen (ski resort) | 300 km (185 mi) | ~3h (I-70 W + CO-82)* | ~4h (A Line + CME private) |
| Colorado Springs | 130 km (81 mi) | ~75 min (I-25 S)* | ~2h (A Line + Bustang/FlixBus from Denver) |
| Grand Junction (western Colorado) | 390 km (243 mi) | ~3.5h (I-70 W) | ~5h (A Line + Amtrak California Zephyr) |
*I-70 westbound is severely congested Friday afternoons (15:00–20:00) and Saturday mornings heading to ski country (07:00–10:00). Sunday afternoon/evenings eastbound (14:00–20:00) returning from mountains. The A Line remains unaffected by this congestion.
---Passenger Statistics
Traffic History and the Mountain State Boom
DEN's growth trajectory over the past decade has been one of the most remarkable in US aviation. The airport was originally designed to accommodate 50 million annual passengers — a figure it surpassed in 2015 and has now exceeded by 65%. The "Vision 100" strategic plan adopted in 2022 is a direct response to this sustained overcapacity situation, targeting infrastructure for 100 million annual passengers.
| Year | Total Passengers | YoY Change | Notes |
|---|---|---|---|
| 2016 | 58.3 million | +7.6% | A Line commuter rail opens (April 2016) |
| 2017 | 61.4 million | +5.3% | Consistent pre-pandemic growth |
| 2018 | 64.5 million | +5.1% | United nonstop Frankfurt announced; DEN top 20 global |
| 2019 | 69.0 million | +7.0% | Pre-pandemic record; 19.3% below 2024 level |
| 2020 | 33.7 million | –51.2% | COVID-19; DEN more resilient than coastal airports (domestic focus) |
| 2021 | 58.8 million | +74.5% | Fastest major airport recovery in US; strong domestic rebound |
| 2022 | 69.3 million | +17.9% | Surpassed pre-pandemic 2019 record; 3rd busiest in US and world |
| 2023 | 77.8 million | +12.3% | New all-time record; 6th busiest globally |
| 2024 | 82.36 million | +5.8% | New record; first year >80M; international +15%, +46% vs 2019 |
| 2025 | 82.43 million | +0.1% | New record (marginal); Lufthansa A380 DEN debut (Apr–Oct 2025) |
Notable structural factors driving DEN's sustained growth: Colorado's population has grown faster than nearly any other US state since 2010; Denver's tech sector has attracted major corporate relocations (Google, Amazon, Apple, Oracle); the ski industry drives consistent seasonal peaks with Vail, Breckenridge, Aspen, and Telluride all within 2–3 hours; and DEN's geographical centrality — equidistant from both coasts — makes it an efficient mid-continent connecting hub. O&D (origin-and-destination) passengers accounted for 55.4% of total traffic in 2024 (45.6 million), with connecting passengers at 44.6% (36.7 million) — a balanced dual-role airport unlike the purely connecting character of Atlanta or Chicago.
---Frequently Asked Questions
Contact Information
Denver International Airport
Phone: +1 (303) 342-2000
24/7
DEN Parking Operations
Phone: +1 (303) 342-4645
RTD A Line (Airport Commuter Rail)
Phone: +1 (303) 299-6000
Open: 03:00–00:30 daily
TSA Information (security)
Phone: +1 (866) 289-9673
United Airlines Customer Service
Phone: +1 (800) 864-8331
Southwest Airlines Customer Service
Phone: +1 (800) 435-9792
Ground Transportation Information Counter
Phone: +1 (303) 342-4059
Location: Jeppesen Terminal, Level 5, central area
Open: 06:00–23:30 daily
Pro Tips for Denver International Airport
- Give yourself at least 10–15 extra minutes in Concourse B if connecting to an international United flight departing from Concourse A. The AGTS train runs frequently but B → A involves: waiting for a train at B station, riding to the terminal junction, transferring at Jeppesen, then riding to Concourse A — this is not a direct loop. The train goes Terminal → A → B → C → B → A → Terminal (each direction), so a B-to-A transfer requires going through the terminal unless you know to board in the specific direction. During mid-morning international departure banks (09:00–11:00), when multiple European departures are operating, Concourse A immigration and security areas can be congested.
- For Priority Pass holders, the Centurion Lounge in Concourse C is not accessible — it requires an American Express Platinum or Centurion card specifically. The best independent Priority Pass option at DEN is limited; most lounges are airline-specific. If you have United status or a United Club card, the three United Club locations in Concourse B are genuinely among the best in the United network — particularly the main Club near B32, which has hot food, a bar, and shower suites. Arrive 2+ hours before your flight to take full advantage. The Centurion Lounge in C frequently has 30–45 minute waits during peak afternoon hours; use the app to check estimated wait times before heading there.
- When flying to a ski resort through DEN on United, note that DEN is United's largest hub — DEN-based connections to Aspen (ASE), Eagle/Vail (EGE), Telluride (TEX), Steamboat Springs (HDN), and Montrose (MTJ) have some of the highest cancellation and diversion rates in the United network during winter storms. Colorado mountain airport weather is notoriously unpredictable. Always book the earliest available connection to mountain airports in winter (less accumulated delay), and if your final destination is Vail or Aspen, have a contingency plan (rental car at Aspen Airport, or mountain shuttle from DEN) in case your EGE/ASE connection cancels. The mountains will still be there tomorrow.
- Book your mountain shuttle well before you arrive — not at the airport. Colorado Mountain Express, Summit Express, and other ski resort shuttles to Vail, Breckenridge, Keystone, and Aspen operate on fixed schedules and fill quickly on Friday-Saturday ski weekends in December–March. Prices also increase significantly if you wait. Booking 2–3 weeks ahead for holiday weekends (Christmas, New Year, Presidents Day weekend) is essential — these sell out. On the same note, if you are renting a car for a mountain trip in ski season, book the car rental at least 2 weeks out. Denver airport rental lots run short on SUVs and AWD vehicles on winter ski weekends, and prices spike dramatically.
- Download the RTD MyRide app and pre-load your A Line ticket before landing. The train is always $10 and runs on a fixed 37-minute schedule regardless of I-70 traffic. If you are landing on a Friday afternoon and heading downtown, the A Line will beat a taxi by 30–60 minutes — I-70 westbound and the I-70/I-270/I-225 interchange are regularly cited among the worst traffic corridors in the United States. On ski-season Saturdays, the train also beats the road for anyone heading east towards Denver rather than west towards the mountains.
- If visiting at altitude for the first time — particularly if coming from near sea level and planning to ski above 3,000 metres (10,000 ft) — consider spending your first night in Denver (1,610 m / 5,280 ft) rather than driving straight to the resort. The incremental acclimatization dramatically reduces the risk of altitude sickness (acute mountain sickness: headache, nausea, fatigue, insomnia) that can ruin the first day or two of a ski trip. Drink 2–3 litres of water on arrival day, avoid alcohol the first evening, and skip the hot tub on night one — all accelerate altitude adjustment.
- Underestimating I-70 congestion on ski weekends. Experienced Colorado travelers know this; first-time visitors consistently do not. The Friday evening corridor (15:00–20:00 DEN to ski resorts) and Sunday evening return (14:00–19:00 from ski resorts to DEN) are two of the most reliably congested highway segments in the United States during ski season. What Google Maps shows as a 90-minute drive to Breckenridge becomes 3–4 hours in a Friday blizzard traffic jam. If you must drive, leave the airport before 13:00 Friday or plan to arrive Saturday morning. For DEN outbound passengers, leave the resort for the airport earlier than any map suggests — allow 3+ hours between resort departure and domestic flight, 4 hours for international.
- Ignoring altitude dehydration effects inside the terminal. DEN's high elevation and Colorado's notoriously dry climate (humidity averages 35–45% — lower than most cities) combine to create significant dehydration effects even for passengers simply transiting through the airport. Alcohol, which is dehydrating itself, is amplified in effect at altitude — a single beer at DEN has roughly the effect of 1.5 beers at sea level. Many passengers attribute their unusual tiredness, mild headaches, or odd feeling after a few terminal beers to flight stress rather than altitude. Drink water consistently throughout your time at DEN, especially before long flights.
- Missing the transit centre entrance for the A Line. The DEN A Line station is NOT at the main terminal entrance doors on Level 5 or Level 6 where taxis and rideshare vehicles operate. It is at the south end of the building, below the Westin hotel, on Level 1 — accessed by following signs for 'Transit Center' (not 'Airport Rail' or 'Light Rail') through the south end of Level 5 and down escalators or elevators. First-time visitors who exit through the main terminal doors on Level 5 looking for the train often walk in circles — follow the Westin hotel signage south and look for the glass atrium leading to the transit hub. Once you find it once, it is obvious; the first time it is easy to miss.