All airlines flying from Seattle-Tacoma (SEA) to Washington Dulles (IAD).

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 23:30 Seattle-Tacoma (SEA) 07:28 Washington Dulles (IAD)
American Airlines AA 9440 Non-stop Boeing 737 (737) 4:58 Effective from 2026-06-10
Codeshare flight, operated by Alaska Airlines.(AS 367)
The flight arrives 1 day after departure.
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All airlines flying from Seattle-Tacoma (SEA) to Washington Dulles (IAD).
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
American Airlines AA9440
23:30
Seattle-Tacoma (SEA)

07:28(+1)
Washington Dulles (IAD)
Effective from 2026-06-10
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 367)
Duration: 4:58, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.
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Parallax here SEA-IAD
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  • A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Washington Dulles airport (IAD).
  • The flight distance is 2299 miles, or 3699 km.
  • The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
  • For direct flights, the flight time varies between 4:50 and 5:17.
Return (IAD-SEA) flights
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