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

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 2024-10-27 through 2024-11-02
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 2024-11-03 through 2025-02-03
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 2025-02-05 through 2025-02-17
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 2025-02-19 through 2025-03-08
Codeshare flight, operated by British Airways.(BA 49)
Daily 15:00 London Heathrow (LHR) 5 17:55 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:55 Effective 2025-03-09 through 2025-03-29
Codeshare flight, operated by British Airways.(BA 49)
Sat 15:45 London Heathrow (LHR) 5 17:30 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:45 Valid until 2024-10-26
Codeshare flight, operated by British Airways.(BA 49)
Sat 15:45 London Heathrow (LHR) 5 17:30 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:45 Effective from 2025-04-05
Codeshare flight, operated by British Airways.(BA 49)
Mon-Fri,Sun 16:00 London Heathrow (LHR) 5 17:45 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:45 Valid until 2024-10-22
Codeshare flight, operated by British Airways.(BA 49)
Wed 16:00 London Heathrow (LHR) 5 17:45 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-9 (789) 9:45 Operates only on 2024-10-23
Codeshare flight, operated by British Airways.(BA 49)
Thu,Fri 16:00 London Heathrow (LHR) 5 17:45 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:45 Effective 2024-10-24 through 2024-10-25
Codeshare flight, operated by British Airways.(BA 49)
Mon-Fri,Sun 16:00 London Heathrow (LHR) 5 17:45 Seattle-Tacoma (SEA)
Finnair AY 5449 Non-stop Boeing 787-10 (781) 9:45 Effective from 2025-03-30
Codeshare flight, operated by British Airways.(BA 49)
Tue,Fri 09:25 London Heathrow (LHR) 5 12:20 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-10 (781) 9:55 Effective 2024-10-29 through 2024-11-01
Codeshare flight, operated by British Airways.(BA 53)
Sat 09:25 London Heathrow (LHR) 5 12:20 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 787-9 (789) 9:55 Operates only on 2024-11-02
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 2024-11-05 through 2024-12-07
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 2024-12-13 through 2025-01-25
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 2025-01-31 through 2025-03-08
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 2025-03-11 through 2025-03-29
Codeshare flight, operated by British Airways.(BA 53)
Thu,Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777-300ER (77W) 9:45 Valid until 2024-09-26
Codeshare flight, operated by British Airways.(BA 53)
Thu,Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777 (777) 9:45 Effective 2024-09-29 through 2024-10-17
Codeshare flight, operated by British Airways.(BA 53)
Thu,Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777-300ER (77W) 9:45 Effective 2024-10-20 through 2024-10-24
Codeshare flight, operated by British Airways.(BA 53)
Thu,Sun 09:45 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777 (777) 9:45 Effective from 2025-03-30
Codeshare flight, operated by British Airways.(BA 53)
Mon-Wed,Fri,Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777-300ER (77W) 9:45 Effective 2024-09-02 through 2024-09-28
Codeshare flight, operated by British Airways.(BA 53)
Mon-Wed,Fri,Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777 (777) 9:45 Effective 2024-09-30 through 2024-10-18
Codeshare flight, operated by British Airways.(BA 53)
Fri,Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777-300ER (77W) 9:45 Effective 2024-10-19 through 2024-10-26
Codeshare flight, operated by British Airways.(BA 53)
Mon-Wed 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777 (777) 9:45 Effective 2024-10-21 through 2024-10-23
Codeshare flight, operated by British Airways.(BA 53)
Mon-Wed,Fri,Sat 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Finnair AY 5451 Non-stop Boeing 777 (777) 9:45 Effective from 2025-03-31
Codeshare flight, operated by British Airways.(BA 53)




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Finnair flights from London Heathrow (LHR) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Finnair AY5449
15:00
London Heathrow (LHR) 5

17:55
Seattle-Tacoma (SEA)
Effective 2024-10-27 through 2024-11-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5449
15:00
London Heathrow (LHR) 5

16:55
Seattle-Tacoma (SEA)
Effective 2024-11-03 through 2025-02-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5449
15:00
London Heathrow (LHR) 5

16:55
Seattle-Tacoma (SEA)
Effective 2025-02-05 through 2025-02-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5449
15:00
London Heathrow (LHR) 5

16:55
Seattle-Tacoma (SEA)
Effective 2025-02-19 through 2025-03-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5449
15:00
London Heathrow (LHR) 5

17:55
Seattle-Tacoma (SEA)
Effective 2025-03-09 through 2025-03-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5449
15:45
London Heathrow (LHR) 5

17:30
Seattle-Tacoma (SEA)
Valid until 2024-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:45, non-stop
Boeing 787-10 (781)
Finnair AY5449
15:45
London Heathrow (LHR) 5

17:30
Seattle-Tacoma (SEA)
Effective from 2025-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:45, non-stop
Boeing 787-10 (781)
Finnair AY5449
16:00
London Heathrow (LHR) 5

17:45
Seattle-Tacoma (SEA)
Valid until 2024-10-22
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:45, non-stop
Boeing 787-10 (781)
Finnair AY5449
16:00
London Heathrow (LHR) 5

17:45
Seattle-Tacoma (SEA)
Operates only on 2024-10-23
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:45, non-stop
Boeing 787-9 (789)
Finnair AY5449
16:00
London Heathrow (LHR) 5

17:45
Seattle-Tacoma (SEA)
Effective 2024-10-24 through 2024-10-25
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:45, non-stop
Boeing 787-10 (781)
Finnair AY5449
16:00
London Heathrow (LHR) 5

17:45
Seattle-Tacoma (SEA)
Effective from 2025-03-30
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:45, non-stop
Boeing 787-10 (781)
Finnair AY5451
09:25
London Heathrow (LHR) 5

12:20
Seattle-Tacoma (SEA)
Effective 2024-10-29 through 2024-11-01
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5451
09:25
London Heathrow (LHR) 5

12:20
Seattle-Tacoma (SEA)
Operates only on 2024-11-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-9 (789)
Finnair AY5451
09:25
London Heathrow (LHR) 5

11:20
Seattle-Tacoma (SEA)
Effective 2024-11-05 through 2024-12-07
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5451
09:25
London Heathrow (LHR) 5

11:20
Seattle-Tacoma (SEA)
Effective 2024-12-13 through 2025-01-25
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5451
09:25
London Heathrow (LHR) 5

11:20
Seattle-Tacoma (SEA)
Effective 2025-01-31 through 2025-03-08
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5451
09:25
London Heathrow (LHR) 5

12:20
Seattle-Tacoma (SEA)
Effective 2025-03-11 through 2025-03-29
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:55, non-stop
Boeing 787-10 (781)
Finnair AY5451
09:45
London Heathrow (LHR) 5

11:30
Seattle-Tacoma (SEA)
Valid until 2024-09-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777-300ER (77W)
Finnair AY5451
09:45
London Heathrow (LHR) 5

11:30
Seattle-Tacoma (SEA)
Effective 2024-09-29 through 2024-10-17
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777 (777)
Finnair AY5451
09:45
London Heathrow (LHR) 5

11:30
Seattle-Tacoma (SEA)
Effective 2024-10-20 through 2024-10-24
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777-300ER (77W)
Finnair AY5451
09:45
London Heathrow (LHR) 5

11:30
Seattle-Tacoma (SEA)
Effective from 2025-03-30
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777 (777)
Finnair AY5451
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2024-09-02 through 2024-09-28
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777-300ER (77W)
Finnair AY5451
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2024-09-30 through 2024-10-18
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777 (777)
Finnair AY5451
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2024-10-19 through 2024-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777-300ER (77W)
Finnair AY5451
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2024-10-21 through 2024-10-23
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777 (777)
Finnair AY5451
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective from 2025-03-31
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 777 (777)
  • 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.
All LHR-SEA flights
All Finnair flights
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