Direct flights from Dulles to Seattle
All flights from IAD to SEA non-stop. There are direct flights from Washington Dulles International (IAD), Virginia, USA to Seattle Tacoma International (SEA), Washington, USA with Alaska Airlines, United Airlines and Delta Air Lines. 48 weekly departures are currently scheduled on this route. Departure times range from 06:03 to 18:14 depending on the schedule period. The flight distance is 2313 miles (3722 km). Flight time ranges from 5 hours and 35 minutes to 6 hours and 5 minutes.
Dulles
, USA
Airlines with non-stop routes:
Alaska Airlines
United Airlines
Delta Air Lines
Flight schedule from Dulles to Seattle with Alaska Airlines
This is a weekly direct flight schedule for Alaska Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-06-29
Flight schedule from Dulles to Seattle with United Airlines
This is a weekly direct flight schedule for United Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-06-29
Flight schedule from Dulles to Seattle with Delta Air Lines
This is a weekly direct flight schedule for Delta Air Lines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-06-29
Dulles to Seattle scheduled departures
Select a date to see every published non-stop departure between IAD and SEA.
IAD - SEA route facts
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Distance2313 miles (3722 km)
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Flight time5 hours and 35 minutes to 6 hours and 5 minutes
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Airlines Alaska Airlines United Delta
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Airline alliancesoneworld Star Alliance SkyTeam
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CabinsEconomy Business First
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Hub airportsAlaska Airlines: SEA (Primary hub.)United Airlines: IAD (Secondary hub.)Delta Air Lines: SEA
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AircraftAlaska Airlines: Boeing 737MAX 9 Passenger, Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737MAX 8 PassengerUnited Airlines: Boeing 737-900 Passenger, Boeing 737-800 Passenger, Boeing 737MAX 9 Passenger, Airbus A320 and Boeing 737MAX 8 PassengerDelta Air Lines: Airbus A220-300
Route FAQ
Nearby airports that offer flights to Seattle (SEA)
From Reagan National (DCA)
21 flights per week
