Direct (nonstop) flights from Washington to Denver
2 airlines fly nonstop from Ronald Reagan Washington National (DCA) to Denver International (DEN). It's 1,475 miles (2,374 km), about 4h 11m in the air. Operated by Frontier Airlines, United Airlines.
Frontier Airlines
United Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
F9
Frontier Airlines
UA
United Airlines
Alternative Routes
Other ways to fly from Washington to Denver with one stop · direct emits 249 kg CO₂ per passenger
Looking for the return flight?
DEN → DCA: Flights from Denver to WashingtonOther direct flights from Washington
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from Washington to Denver?
A nonstop flight from Washington (DCA) to Denver (DEN) takes approximately 4 hours and 11 minutes. The distance is 1,475 miles (2,374 km).
Which airlines fly nonstop from Washington to Denver?
2 airlines: Frontier Airlines, United Airlines.
Is there a nonstop flight from Washington to Denver?
Yes. 2 airlines: Frontier Airlines, United Airlines.
How far is Washington from Denver?
The flight distance from Washington to Denver is 1,475 miles (2,374 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 Washington to Denver?
At 4h 11m, 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 Washington to Denver?
Roughly 249 kg CO2 per passenger one-way. That's about the same as driving 1,245 km.
Is the return flight from Denver to Washington 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 Washington to Denver?
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 Ronald Reagan Washington National for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.