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

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 17:00 London Heathrow (LHR) 3 18:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 101 Non-stop Boeing 787-9 (789) 9:50 Effective 2026-05-22 through 2026-06-10
Daily 17:00 London Heathrow (LHR) 3 18:45 Seattle-Tacoma (SEA)
Alaska Airlines AS 101 Non-stop Boeing 787-9 (789) 9:45 Effective 2026-06-11 through 2026-08-18
Daily 17:00 London Heathrow (LHR) 3 18:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 101 Non-stop Boeing 787-9 (789) 9:55 Effective 2026-08-19 through 2026-10-24
Daily 17:00 London Heathrow (LHR) 3 19:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 101 Non-stop Boeing 787-9 (789) 9:55 Effective from 2026-10-25
Direct Codeshare Flights:
Daily 14:55 London Heathrow (LHR) 5 16:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787 (787) 10:00 Valid until 2026-03-02
Codeshare flight, operated by British Airways.(BA 49)
Tue,Fri,Sat 14:55 London Heathrow (LHR) 5 16:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787-9 (789) 10:00 Effective 2026-03-03 through 2026-03-07
Codeshare flight, operated by British Airways.(BA 49)
Wed,Thu 14:55 London Heathrow (LHR) 5 16:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787 (787) 10:00 Effective 2026-03-04 through 2026-03-05
Codeshare flight, operated by British Airways.(BA 49)
Daily 14:55 London Heathrow (LHR) 5 17:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787 (787) 10:00 Effective 2026-03-08 through 2026-03-22
Codeshare flight, operated by British Airways.(BA 49)
Mon-Sat 14:55 London Heathrow (LHR) 5 17:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787-9 (789) 10:00 Effective 2026-03-23 through 2026-03-28
Codeshare flight, operated by British Airways.(BA 49)
Daily 14:55 London Heathrow (LHR) 5 17:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787 (787) 10:00 Effective from 2026-10-25
Codeshare flight, operated by British Airways.(BA 49)
Daily 16:30 London Heathrow (LHR) 5 18:25 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 777 (777) 9:55 Effective 2026-03-29 through 2026-08-31
Codeshare flight, operated by British Airways.(BA 49)
Daily 16:30 London Heathrow (LHR) 5 18:25 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 787 (787) 9:55 Effective 2026-09-01 through 2026-09-30
Codeshare flight, operated by British Airways.(BA 49)
Daily 16:30 London Heathrow (LHR) 5 18:25 Seattle-Tacoma (SEA)
Alaska Airlines AS 5267 Non-stop Boeing 777 (777) 9:55 Effective 2026-10-01 through 2026-10-24
Codeshare flight, operated by British Airways.(BA 49)
Tue,Fri,Sat 09:25 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 777 (777) 10:05 Valid until 2026-02-07
Codeshare flight, operated by British Airways.(BA 53)
Tue,Fri,Sat 09:25 London Heathrow (LHR) 5 11:30 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 777 (777) 10:05 Effective 2026-02-13 through 2026-03-07
Codeshare flight, operated by British Airways.(BA 53)
Tue,Fri,Sat 09:25 London Heathrow (LHR) 5 12:30 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 777 (777) 10:05 Effective 2026-03-10 through 2026-03-28
Codeshare flight, operated by British Airways.(BA 53)
Tue,Fri,Sat 09:25 London Heathrow (LHR) 5 12:30 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 777 (777) 10:05 Effective from 2026-10-27
Codeshare flight, operated by British Airways.(BA 53)
Mon 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 787-9 (789) 9:45 Operates only on 2026-03-30
Codeshare flight, operated by British Airways.(BA 53)
Mon,Wed 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 787 (787) 9:45 Effective 2026-04-01 through 2026-04-08
Codeshare flight, operated by British Airways.(BA 53)
Mon-Fri,Sun 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 787 (787) 9:45 Effective 2026-04-10 through 2026-04-17
Codeshare flight, operated by British Airways.(BA 53)
Daily 09:50 London Heathrow (LHR) 5 11:35 Seattle-Tacoma (SEA)
Alaska Airlines AS 5269 Non-stop Boeing 787 (787) 9:45 Effective 2026-04-18 through 2026-10-24
Codeshare flight, operated by British Airways.(BA 53)




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Alaska Airlines flights from London Heathrow (LHR) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Alaska Airlines AS101
17:00
London Heathrow (LHR) 3

18:50
Seattle-Tacoma (SEA)
Effective 2026-05-22 through 2026-06-10
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:50, non-stop
Boeing 787-9 (789)
Direct Flights:
Alaska Airlines AS101
17:00
London Heathrow (LHR) 3

18:45
Seattle-Tacoma (SEA)
Effective 2026-06-11 through 2026-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:45, non-stop
Boeing 787-9 (789)
Direct Flights:
Alaska Airlines AS101
17:00
London Heathrow (LHR) 3

18:55
Seattle-Tacoma (SEA)
Effective 2026-08-19 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:55, non-stop
Boeing 787-9 (789)
Direct Flights:
Alaska Airlines AS101
17:00
London Heathrow (LHR) 3

19:55
Seattle-Tacoma (SEA)
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:55, non-stop
Boeing 787-9 (789)
Direct Codeshare Flights:
Alaska Airlines AS5267
14:55
London Heathrow (LHR) 5

16:55
Seattle-Tacoma (SEA)
Valid until 2026-03-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 10:00, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5267
14:55
London Heathrow (LHR) 5

16:55
Seattle-Tacoma (SEA)
Effective 2026-03-03 through 2026-03-07
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 10:00, non-stop
Boeing 787-9 (789)
Direct Codeshare Flights:
Alaska Airlines AS5267
14:55
London Heathrow (LHR) 5

16:55
Seattle-Tacoma (SEA)
Effective 2026-03-04 through 2026-03-05
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 10:00, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5267
14:55
London Heathrow (LHR) 5

17:55
Seattle-Tacoma (SEA)
Effective 2026-03-08 through 2026-03-22
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 10:00, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5267
14:55
London Heathrow (LHR) 5

17:55
Seattle-Tacoma (SEA)
Effective 2026-03-23 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 49)
Duration: 10:00, non-stop
Boeing 787-9 (789)
Direct Codeshare Flights:
Alaska Airlines AS5267
14:55
London Heathrow (LHR) 5

17:55
Seattle-Tacoma (SEA)
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 10:00, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5267
16:30
London Heathrow (LHR) 5

18:25
Seattle-Tacoma (SEA)
Effective 2026-03-29 through 2026-08-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 777 (777)
Direct Codeshare Flights:
Alaska Airlines AS5267
16:30
London Heathrow (LHR) 5

18:25
Seattle-Tacoma (SEA)
Effective 2026-09-01 through 2026-09-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5267
16:30
London Heathrow (LHR) 5

18:25
Seattle-Tacoma (SEA)
Effective 2026-10-01 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 49)
Duration: 9:55, non-stop
Boeing 777 (777)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:25
London Heathrow (LHR) 5

11:30
Seattle-Tacoma (SEA)
Valid until 2026-02-07
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 10:05, non-stop
Boeing 777 (777)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:25
London Heathrow (LHR) 5

11:30
Seattle-Tacoma (SEA)
Effective 2026-02-13 through 2026-03-07
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 10:05, non-stop
Boeing 777 (777)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:25
London Heathrow (LHR) 5

12:30
Seattle-Tacoma (SEA)
Effective 2026-03-10 through 2026-03-28
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 10:05, non-stop
Boeing 777 (777)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:25
London Heathrow (LHR) 5

12:30
Seattle-Tacoma (SEA)
Effective from 2026-10-27
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 10:05, non-stop
Boeing 777 (777)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Operates only on 2026-03-30
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787-9 (789)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2026-04-01 through 2026-04-08
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2026-04-10 through 2026-04-17
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787 (787)
Direct Codeshare Flights:
Alaska Airlines AS5269
09:50
London Heathrow (LHR) 5

11:35
Seattle-Tacoma (SEA)
Effective 2026-04-18 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by British Airways. (BA 53)
Duration: 9:45, non-stop
Boeing 787 (787)
  • 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 10:05.
All LHR-SEA flights
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