Dulles to Denver (IAD–DEN) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
IAD–DEN is served by 4 airlines with nonstop service. United Airlines, Southwest Airlines and ITA Airways lead the route. The flight covers 1,449 miles in approximately 3h 12m. Beyond nonstop, 196 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: AV, CM, ET, SN | 77 | 32Q, 739, 753, A21N | 3h52-4h11 | Star Alliance | AV, CM, ET, SN | |
| WN Southwest Airlines | 14 | 7M8, B38M | 3h50-4h05 | – | – | |
| AZ ITA Airways | 3 | 739 | 4h10 | SkyTeam | – | |
| AC Air Canada | 0 | – | – | Star Alliance | – |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Denver from Dulles
| Metric | IAD→DEN | DCA→DEN | BWI→DEN |
|---|---|---|---|
| Distance from IAD | – | 23 mi | 45 mi |
| Nonstop airlines | 4 | 5 | 3 |
| Weekly flights | 172 | 49 | 49 |
| Flight time | 3h 12m | 4h 5m | 3h 46m |
| Departure OTP | 85% | – | – |
Travel Essentials
IAD: EDT · DEN: MDT
When it's 6:00 PM in Dulles, it's 4:00 PM in Denver.
WMATA Silver Line Metro now reaches Dulles directly; take Silver Line to Washington Dulles Airport station (about 65 min from Metro Center, ~$7). The connection opened in late 2022.Ride-shares from downtown DC run $35–60 and take 35–50 minutes via I-66 (longer during peak hours). Washington Flyer coach to Wiehle-Reston East Metro costs $6. The airport is 27 miles from downtown; taxis are expensive ($60–80).
RTD A Line runs to Denver Union Station (37 min, $10.50) with connections to light rail and bus routes. Taxis have meters; expect $55–65 to downtown.DEN's tent-roof Jeppesen Terminal is a single building; all three concourses connect via the underground automated train. Rental cars are on level 5. For ski resorts, shuttle services depart from Ground Transportation.
Semi-arid with 300+ days of sunshine. Summers are dry and warm (27–34°C) with afternoon thunderstorms that produce dramatic but brief delays. Winters bring cold temperatures (−8 to 5°C) and heavy blizzards that can shut down ground operations.
Spring snowstorms can be heavier than midwinter ones. Altitude (5,430 ft) means low humidity year-round; stay hydrated.
IAD–DEN Quick Facts
Frequently Asked Questions
Flights from IAD to DEN
Washington Dulles International Airport (IAD) and Denver International Airport (DEN) are connected by nonstop service from Air Canada, ITA Airways, United Airlines and Southwest Airlines. With 172 weekly departures, this is a heavily served route.
IAD to DEN Flight Duration and Schedule
Nonstop flight time from IAD to DEN ranges from 3 hours 12 minutes to 4 hours 11 minutes. The route covers a distance of 1,449 miles (2,332 km). There are approximately 172 weekly flights outbound and 170 return, totaling 342 flights per week in both directions.
Connecting Options and Alternatives
196 one-stop connections are available, with the fastest taking approximately 4 hours via CPS. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Washington (DCA), Baltimore (BWI) and Richmond (RIC).