Finnair flights from London Heathrow (LHR) to Seattle-Tacoma (SEA).

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 15:00 London Heathrow (LHR) 5 17:55 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:55 Effective 2025-10-26 through 2025-11-01
Codeshare flight, operated by British Airways.(BA 49)
Daily 15:00 London Heathrow (LHR) 5 16:55 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:55 Effective from 2025-11-02
Codeshare flight, operated by British Airways.(BA 49)
Daily 16:30 London Heathrow (LHR) 5 18:20 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 777-300ER (77W) 9:50 Valid until 2025-06-08
Codeshare flight, operated by British Airways.(BA 49)
Daily 16:30 London Heathrow (LHR) 5 18:20 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 777 (777) 9:50 Effective 2025-06-09 through 2025-06-27
Codeshare flight, operated by British Airways.(BA 49)
Daily 16:30 London Heathrow (LHR) 5 18:20 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 777-300ER (77W) 9:50 Effective 2025-06-28 through 2025-10-25
Codeshare flight, operated by British Airways.(BA 49)
Tue 09:25 London Heathrow (LHR) 5 11:10 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:45 Valid until 2025-08-05
Codeshare flight, operated by British Airways.(BA 53)
Tue 09:25 London Heathrow (LHR) 5 11:10 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-9 (789) 9:45 Effective 2025-08-12 through 2025-08-26
Codeshare flight, operated by British Airways.(BA 53)
Tue 09:25 London Heathrow (LHR) 5 11:10 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:45 Effective 2025-09-02 through 2025-10-21
Codeshare flight, operated by British Airways.(BA 53)
Tue,Fri,Sat 09:25 London Heathrow (LHR) 5 12:20 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:55 Effective 2025-10-28 through 2025-11-01
Codeshare flight, operated by British Airways.(BA 53)
Tue,Fri,Sat 09:25 London Heathrow (LHR) 5 11:20 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:55 Effective from 2025-11-04
Codeshare flight, operated by British Airways.(BA 53)
Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:45 Valid until 2025-08-10
Codeshare flight, operated by British Airways.(BA 53)
Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-9 (789) 9:45 Effective 2025-08-17 through 2025-08-31
Codeshare flight, operated by British Airways.(BA 53)
Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:45 Effective 2025-09-07 through 2025-10-19
Codeshare flight, operated by British Airways.(BA 53)
Mon,Wed-Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:45 Valid until 2025-08-09
Codeshare flight, operated by British Airways.(BA 53)
Mon 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-8 (788) 9:45 Operates only on 2025-08-11
Codeshare flight, operated by British Airways.(BA 53)
Mon,Wed-Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-9 (789) 9:45 Effective 2025-08-13 through 2025-08-30
Codeshare flight, operated by British Airways.(BA 53)
Mon,Wed-Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:45 Effective 2025-09-01 through 2025-10-25
Codeshare flight, operated by British Airways.(BA 53)
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Parallax here LHR-SEA


Finnair flights from London Heathrow (LHR) to Seattle-Tacoma (SEA).
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:

Effective 2025-10-26 through 2025-11-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)

Effective from 2025-11-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)

Valid until 2025-06-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:50, non-stop
Boeing 777-300ER (77W)

Effective 2025-06-09 through 2025-06-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:50, non-stop
Boeing 777 (777)

Effective 2025-06-28 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:50, non-stop
Boeing 777-300ER (77W)

Valid until 2025-08-05
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-10 (781)

Effective 2025-08-12 through 2025-08-26
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-9 (789)

Effective 2025-09-02 through 2025-10-21
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-10 (781)

Effective 2025-10-28 through 2025-11-01
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)

Effective from 2025-11-04
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)

Valid until 2025-08-10
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-10 (781)

Effective 2025-08-17 through 2025-08-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-9 (789)

Effective 2025-09-07 through 2025-10-19
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-10 (781)

Valid until 2025-08-09
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-10 (781)

Operates only on 2025-08-11
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-8 (788)

Effective 2025-08-13 through 2025-08-30
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-9 (789)

Effective 2025-09-01 through 2025-10-25
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-10 (781)
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Parallax here LHR-SEA
  • An international route departing from London Heathrow airport, United Kingdom (LHR) and arriving at Seattle-Tacoma airport, United States (SEA).
  • The flight distance is 4783 miles, or 7697 km.
  • The timezone of the departure airport is UTC+0 , 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 9:45 and 9:55.