Denver to Dulles (DEN–IAD) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
DEN–IAD is served by 4 airlines with nonstop service. United Airlines, Delta Air Lines and Key Lime Air lead the route. The flight covers 1,449 miles in approximately 3h 28m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: AV, AZ, CM, ET, SN | 60 | 32Q, 753, A21N | 3h23-3h30 | Star Alliance | AV, AZ, CM, ET, SN | |
| DL Delta Air Lines | 1 | – | – | SkyTeam | – | |
| KG Key Lime Air | 1 | – | – | – | – | |
| WN Southwest Airlines | 0 | – | – | – | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Dulles from Denver
| Metric | DEN→IAD | BJC→IAD | COS→IAD |
|---|---|---|---|
| Distance from DEN | – | 24 mi | 73 mi |
| Nonstop airlines | 4 | 5 | 4 |
| Weekly flights | 137 | 1 | 1 |
| Flight time | 3h 28m | 2h 59m | 2h 55m |
| Departure OTP | 85% | – | – |
Travel Essentials
DEN: MDT · IAD: EDT
When it's 6:00 PM in Denver, it's 8:00 PM in Dulles.
RTD A Line commuter rail runs from Denver Union Station to the airport (37 min, $10.50). Trains depart every 15 minutes during peak hours. The airport is 25 miles northeast of downtown; ride-shares cost $35–55 and take 30–45 minutes depending on I-70 traffic.Economy parking in lots 4–6 connects via free shuttle. Mountain shuttle services depart from Jeppesen Terminal's Ground Transportation level.
Silver Line Metro runs from Washington Dulles Airport station to Metro Center in about 65 minutes (~$7). The route bypasses I-66 and I-495 congestion entirely. Washington Flyer coach also runs to Wiehle-Reston East station ($6, 15 min) for Metro connection.Taxis and ride-shares to downtown DC cost $55–80 and take 35–55 minutes depending on traffic. Car rental facilities are on-site. Dulles is 27 miles west of the Capitol; it is farther than either DCA or BWI from central DC.
Humid continental climate. Summers are hot and muggy (30–36°C) with frequent afternoon thunderstorms that cause delays June through August. Winters bring cold temperatures (−3 to 5°C) with snow and ice. The Virginia suburbs accumulate more snow than downtown DC, and ice storms are the primary disruption risk.
Dulles sits at higher elevation in Virginia's piedmont and sees more winter precipitation than DCA. Spring and fall are variable. Snowfall is possible into April. Thunderstorms begin from April through May.
DEN–IAD Quick Facts
Frequently Asked Questions
Flights from DEN to IAD
Denver International Airport (DEN) and Washington Dulles International Airport (IAD) are connected by nonstop service from United Airlines, Delta Air Lines, Key Lime Air and Southwest Airlines. With 137 weekly departures, this is a heavily served route.
DEN to IAD Flight Duration and Schedule
Nonstop flight time from DEN to IAD is about 3 hours 28 minutes gate to gate. The route covers a distance of 1,449 miles (2,332 km). There are approximately 137 weekly flights outbound and 173 return, totaling 310 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via St. Louis Lambert, John Glenn Columbus and Kansas City. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Denver (BJC), Colorado Springs (COS) and Pueblo (PUB).