Finnair flights from Washington Dulles (IAD) to Seattle-Tacoma (SEA).

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Tue,Fri,Sun 09:00 Washington Dulles (IAD) 11:39 Seattle-Tacoma (SEA)
Finnair AY 4588 Non-stop Boeing 737 (73J) 5:39 Effective 2026-05-15 through 2026-06-09
Codeshare flight, operated by Alaska Airlines.(AS 375)
Tue,Fri,Sun 09:00 Washington Dulles (IAD) 11:50 Seattle-Tacoma (SEA)
Finnair AY 4588 Non-stop Boeing 737 (73J) 5:50 Effective 2026-06-12 through 2026-08-14
Codeshare flight, operated by Alaska Airlines.(AS 375)
Mon,Fri 09:00 Washington Dulles (IAD) 11:50 Seattle-Tacoma (SEA)
Finnair AY 4588 Non-stop Boeing 737 (73J) 5:50 Effective 2026-08-17 through 2026-09-28
Codeshare flight, operated by Alaska Airlines.(AS 375)
Tue 10:00 Washington Dulles (IAD) 12:54 Seattle-Tacoma (SEA)
Finnair AY 4588 Non-stop Boeing 737 (73J) 5:54 Effective 2026-04-28 through 2026-05-05
Codeshare flight, operated by Alaska Airlines.(AS 375)
Tue,Sun 10:00 Washington Dulles (IAD) 12:54 Seattle-Tacoma (SEA)
Finnair AY 4588 Non-stop Boeing 737 (73J) 5:54 Effective 2026-05-10 through 2026-05-12
Codeshare flight, operated by Alaska Airlines.(AS 375)


Finnair flights from Washington Dulles (IAD) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:

Effective 2026-05-15 through 2026-06-09
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 375)
Duration: 5:39, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Effective 2026-06-12 through 2026-08-14
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 375)
Duration: 5:50, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Effective 2026-08-17 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 375)
Duration: 5:50, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Effective 2026-04-28 through 2026-05-05
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 375)
Duration: 5:54, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Effective 2026-05-10 through 2026-05-12
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 375)
Duration: 5:54, non-stop
Boeing 737 (73J)
  • A domestic route departing from the Washington Dulles airport (IAD) and arriving at Seattle-Tacoma airport (SEA).
  • The flight distance is 2299 miles, or 3699 km.
  • The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC-8 . 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 5:39 and 5:54.