Airlines with flights from Washington to Denver
There are 6 airlines with scheduled flights between DCA and DEN. Both Frontier and United operates non-stop flights from Reagan National to Denver International and the flight time is 4 hours and 4 minutes.
Choose airline
Schedules
Non-stop with Frontier Airlines
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Total flight time: 4 hours and 4 minutes
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Low-cost airline
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Denver is a Frontier Airlines focus city (Operating base).
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19 flights per week
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Airbus A320neo
Flight
The timetable & schedule information was updated at 2026-04-21
Non-stop with United Airlines
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Total flight time: 4 hours
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Denver is a United Airlines hub.
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7 flights per week
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Airbus A321neo
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Business and first class available
Flight
The timetable & schedule information was updated at 2026-04-21
Via Saint Louis with Southwest Airlines
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Total flight time: 5h 00m - 10h 10m.
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Low-cost airline
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Denver is a Southwest Airlines focus city (Operating base).
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113 flights per week
Flight
WN4312
WN3912
WN824
WN3912
WN824
WN5067
WN3913
WN3913
WN824
WN4176
WN3914
WN4243
The timetable & schedule information was updated at 2026-04-21
Via Chicago with Southwest Airlines
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Total flight time: 5h 05m - 10h 00m.
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Low-cost airline
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Denver is a Southwest Airlines focus city (Operating base).
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152 flights per week
Flight
WN1102
WN206
WN2654
WN2733
WN2960
WN2960
WN1331
WN481
WN2768
WN2142
WN2766
WN2769
WN481
WN1497
WN2770
WN2770
WN2770
WN2770
The timetable & schedule information was updated at 2026-04-21
Via Kansas City with Southwest Airlines
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Total flight time: 5h 05m - 9h 55m.
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Low-cost airline
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Denver is a Southwest Airlines focus city (Operating base).
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77 flights per week
Flight
WN3169
WN3169
WN2548
WN1536
WN3570
WN1574
The timetable & schedule information was updated at 2026-04-21
Via Milwaukee with Southwest Airlines
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Total flight time: 5h 15m - 7h 25m.
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Low-cost airline
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Denver is a Southwest Airlines focus city (Operating base).
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35 flights per week
Flight
WN2287
WN2944
WN1662
WN492
WN3885
WN3885
The timetable & schedule information was updated at 2026-04-21

There are 6 airlines with scheduled flights between DCA and DEN. Both Frontier and United operates non-stop flights from Reagan National to Denver International and the flight time is 4 hours and 4 minutes.
Via Chicago with American Airlines
Via Minneapolis with Delta
Via Boston with JetBlue