Direct flights from Seattle to Dulles
All flights from SEA to IAD non-stop. There are direct flights from Seattle Tacoma International (SEA), Washington, USA to Washington Dulles International (IAD), Virginia, USA with Alaska Airlines, United Airlines and Delta Air Lines. 42 weekly departures are currently scheduled on this route. Departure times range from 08:00 to 23:20 depending on the schedule period. The flight distance is 2313 miles (3722 km). Flight time ranges from 4 hours and 53 minutes to 5 hours and 16 minutes.
Seattle
, USA
Airlines with non-stop routes:
Alaska Airlines
United Airlines
Delta Air Lines
Flight schedule from Seattle to Dulles 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 2026-08-17
Flight schedule from Seattle to Dulles 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 2026-08-17
Flight schedule from Seattle to Dulles 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 2026-08-17
Seattle to Dulles scheduled departures
Select a date to see every published non-stop departure between SEA and IAD.
SEA - IAD route facts
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Distance2313 miles (3722 km)
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Flight time4 hours and 53 minutes to 5 hours and 16 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 737-900 (winglets) Passenger/BBJ3, Boeing 737MAX 9 Passenger, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737MAX 8 PassengerUnited Airlines: Boeing 737-900 Passenger, Boeing 737MAX 8 Passenger, Boeing 737MAX 9 Passenger and Airbus A320Delta Air Lines: Airbus A220-300
