Direct (nonstop) flights from Denver to Dulles
2 airlines fly nonstop from Denver International (DEN) to Washington Dulles International (IAD). It's 1,453 miles (2,338 km), about 3h 25m in the air. Operated by United Airlines, Southwest Airlines.
United Airlines
Southwest Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Denver to Dulles with one stop · direct emits 245 kg CO₂ per passenger
Looking for the return flight?
IAD → DEN: Flights from Dulles to DenverOther direct flights from Denver
Direct flights from Dulles (IAD)
Frequently Asked Questions
How long is the direct flight from Denver to Dulles?
A nonstop flight from Denver (DEN) to Dulles (IAD) takes approximately 3 hours and 25 minutes. The distance is 1,453 miles (2,338 km).
Which airlines fly nonstop from Denver to Dulles?
2 airlines: United Airlines, Southwest Airlines.
Is there a nonstop flight from Denver to Dulles?
Yes. 2 airlines: United Airlines, Southwest Airlines.
How far is Denver from Dulles?
The flight distance from Denver to Dulles is 1,453 miles (2,338 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Miami.
What type of aircraft flies from Denver to Dulles?
At 3h 25m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Denver to Dulles?
Roughly 245 kg CO2 per passenger one-way. That's about the same as driving 1,225 km.
Is the return flight from Dulles to Denver also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Denver to Dulles?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Denver International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.