Cheap Flights from Washington Dulles International Airport to Seattle (SEA) Find and Compare the Best Airline Deals | Skyticket

Departure Date

2025/10
Sun	Mon	Tue	Wed	Thu	Fri	Sat
			1Search	2415	3415	4379
5Search	6Search	7Search	8Search	9412	10Search	111,322
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2025/10
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Total Fares（Round-Trip/Economy）: USD /Per Person

* Displayed fare(s) may differ from the actual search result

Washington Dulles－Seattle-Tacoma Airport
October Lowest Airfares
USD379

The airfare displayed above is for United Airlines

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Washington Dulles－Seattle-Tacoma Airport
November Lowest Airfares
USD256

The airfare displayed above is for Delta Air Lines

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Washington Dulles－Seattle-Tacoma Airport
December Lowest Airfares
USD1,530

The airfare displayed above is for Alaska Airlines

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Washington Dulles－Seattle-Tacoma Airport
January Lowest Airfares -----
Washington Dulles－Seattle-Tacoma Airport
February Lowest Airfares
USD339

The airfare displayed above is for Delta Air Lines

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Washington D.C－Seattle
Estimated Flight Time
5 Hours 34 Minutes
Washington D.C－Seattle
Number of Operating Airlines
5

Operating Airlines for Washington Dulles－Seattle-Tacoma Airport Route
Non-StopUnited Airlines

Delta Air Lines

Non-StopAlaska Airlines

American Airlines

SUN COUNTRY

Other Destinations from:Washington D.C

Washington Dulles－Boston(Logan)
USD216〜
Washington Dulles－Chicago(O'Hare)
USD187〜
Washington Dulles－Chicago(Midway)
USD219〜
Washington Dulles－Dallas(/Fort Worth)
USD145〜
Washington Dulles－Dallas(Love Field)
USD234〜
* Fares vary in accordance to seat availability
Other Departures to: Seattle

Dallas/Fort Worth Airport－Seattle(-Tacoma)
USD198〜
San Diego Airport－Seattle(-Tacoma)
USD171〜
O'Hare Airport－Seattle(-Tacoma)
USD109〜
Hartsfield-Jackson Atlanta Airport－Seattle(-Tacoma)
USD256〜
Baltimore-Washington Airport－Seattle(-Tacoma)
USD195〜
Ronald Reagan Washington National Airport－Seattle(-Tacoma)
USD273〜
* Fares vary in accordance to seat availability