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 6 airlines with nonstop service. United Airlines, Copa Airlines and Southwest Airlines lead the route. The flight covers 1,449 miles in approximately 3h 20m. Beyond nonstop, 140 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines | 68 | 32Q, 739, A21N, B39M | 3h33-4h17 | Star Alliance | – | |
| CM Copa Airlines | 49 | 32Q, 739, A21N, B39M | 4h07-4h21 | Star Alliance | – | |
| WN Southwest Airlines | 28 | 73H, 7M8 | 3h35-4h | – | – | |
| AV avianca | 7 | 739 | 4h16 | Star Alliance | – | |
| ET Ethiopian Airlines | 7 | 7M9 | 4h10 | Star Alliance | – | |
| AZ ITA Airways | 3 | 739 | 4h10 | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Denver from Dulles
| Metric | IAD→DEN | DCA→DEN | BWI→DEN |
|---|---|---|---|
| Distance from IAD | – | 23 mi | 45 mi |
| Nonstop airlines | 6 | 4 | 2 |
| Weekly flights | 163 | 36 | 85 |
| Flight time | 3h 20m | 1h | 3h 28m |
| Departure OTP | 50% | – | – |
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 avianca, ITA Airways, Copa Airlines, Ethiopian Airlines, United Airlines and Southwest Airlines. With 163 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 20 minutes to 4 hours 21 minutes. The route covers a distance of 1,449 miles (2,332 km). There are approximately 163 weekly flights outbound and 158 return, totaling 321 flights per week in both directions.
Connecting Options and Alternatives
140 one-stop connections are available, with the fastest taking approximately 4 hours via XNA. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Washington (DCA), Baltimore (BWI) and Richmond (RIC).