Finnair flight AY 4579: Seattle-Tacoma - Detroit

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Tue 21:30 Seattle-Tacoma (SEA) 05:03 Detroit (DTW) E
AY 4579 Non-stop Boeing 737 (73J) 4:33 Effective 2026-04-28 through 2026-05-05
Codeshare flight, operated by Alaska Airlines.(AS 380)
The flight arrives 1 day after departure.
Tue,Sun 21:30 Seattle-Tacoma (SEA) 05:03 Detroit (DTW) E
AY 4579 Non-stop Boeing 737 (73J) 4:33 Effective 2026-05-10 through 2026-05-12
Codeshare flight, operated by Alaska Airlines.(AS 380)
The flight arrives 1 day after departure.
Tue,Fri,Sun 21:45 Seattle-Tacoma (SEA) 05:14 Detroit (DTW) E
AY 4579 Non-stop Boeing 737 (73J) 4:29 Effective 2026-05-15 through 2026-06-09
Codeshare flight, operated by Alaska Airlines.(AS 406)
The flight arrives 1 day after departure.
Tue,Fri,Sun 21:45 Seattle-Tacoma (SEA) 05:05 Detroit (DTW) E
AY 4579 Non-stop Boeing 737 (73J) 4:20 Effective 2026-06-12 through 2026-08-14
Codeshare flight, operated by Alaska Airlines.(AS 380)
The flight arrives 1 day after departure.
Mon,Fri 21:45 Seattle-Tacoma (SEA) 05:05 Detroit (DTW) E
AY 4579 Non-stop Boeing 737 (73J) 4:20 Effective 2026-08-17 through 2026-09-28
Codeshare flight, operated by Alaska Airlines.(AS 380)
The flight arrives 1 day after departure.
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Finnair flight AY 4579:
Seattle-Tacoma - Detroit
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Finnair AY4579
21:30
Seattle-Tacoma (SEA)

05:03(+1)
Detroit (DTW) E
Effective 2026-04-28 through 2026-05-05
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 380)
Duration: 4:33, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY4579
21:30
Seattle-Tacoma (SEA)

05:03(+1)
Detroit (DTW) E
Effective 2026-05-10 through 2026-05-12
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 380)
Duration: 4:33, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY4579
21:45
Seattle-Tacoma (SEA)

05:14(+1)
Detroit (DTW) E
Effective 2026-05-15 through 2026-06-09
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 4:29, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY4579
21:45
Seattle-Tacoma (SEA)

05:05(+1)
Detroit (DTW) E
Effective 2026-06-12 through 2026-08-14
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 380)
Duration: 4:20, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY4579
21:45
Seattle-Tacoma (SEA)

05:05(+1)
Detroit (DTW) E
Effective 2026-08-17 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 380)
Duration: 4:20, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.
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  • AY 4579 is a domestic flight departing from the Seattle-Tacoma airport (SEA) and arriving at Detroit airport (DTW).
  • The flight distance is 1921 miles, or 3091 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 4:20 and 4:33.
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