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

FLIGHT SCHEDULE
Direct Flights:
Daily 18:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-10 (781) 9:30 Valid until 2026-03-02 The flight arrives 1 day after departure.
Tue,Fri,Sat 18:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-9 (789) 9:30 Effective 2026-03-03 through 2026-03-07 The flight arrives 1 day after departure.
Wed,Thu 18:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-10 (781) 9:30 Effective 2026-03-04 through 2026-03-05 The flight arrives 1 day after departure.
Daily 19:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-10 (781) 9:30 Effective 2026-03-08 through 2026-03-22 The flight arrives 1 day after departure.
Mon-Fri 19:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-9 (789) 9:30 Effective 2026-03-23 through 2026-03-27 The flight arrives 1 day after departure.
Sat 19:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 777-300ER (77W) 9:30 Operates only on 2026-10-24 The flight arrives 1 day after departure.
Daily 19:50 Seattle-Tacoma (SEA) 12:20 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-10 (781) 9:30 Effective from 2026-10-25 The flight arrives 1 day after departure.
Sat 20:20 Seattle-Tacoma (SEA) 13:45 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-9 (789) 9:25 Operates only on 2026-03-28 The flight arrives 1 day after departure.
Daily 20:20 Seattle-Tacoma (SEA) 13:45 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 777-300ER (77W) 9:25 Effective 2026-03-29 through 2026-04-21 The flight arrives 1 day after departure.
Daily 20:20 Seattle-Tacoma (SEA) 13:45 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 777 (777) 9:25 Effective 2026-04-22 through 2026-04-30 The flight arrives 1 day after departure.
Daily 20:20 Seattle-Tacoma (SEA) 13:45 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 777-300ER (77W) 9:25 Effective 2026-05-01 through 2026-08-31 The flight arrives 1 day after departure.
Daily 20:20 Seattle-Tacoma (SEA) 13:45 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 787-10 (781) 9:25 Effective 2026-09-01 through 2026-09-30 The flight arrives 1 day after departure.
Daily 20:20 Seattle-Tacoma (SEA) 13:45 London Heathrow (LHR) 5 British Airways BA 48 Non-stop Boeing 777-300ER (77W) 9:25 Effective 2026-10-01 through 2026-10-23 The flight arrives 1 day after departure.
Tue 13:25 Seattle-Tacoma (SEA) 07:00 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Valid until 2026-02-03 The flight arrives 1 day after departure.
Tue 13:25 Seattle-Tacoma (SEA) 07:00 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Effective 2026-02-17 through 2026-03-03 The flight arrives 1 day after departure.
Fri,Sat 13:35 Seattle-Tacoma (SEA) 07:10 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Valid until 2026-03-07 The flight arrives 1 day after departure.
Mon 13:35 Seattle-Tacoma (SEA) 06:50 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 787-9 (789) 9:15 Operates only on 2026-03-30 The flight arrives 1 day after departure.
Mon,Wed 13:35 Seattle-Tacoma (SEA) 06:50 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 787-10 (781) 9:15 Effective 2026-04-01 through 2026-04-08 The flight arrives 1 day after departure.
Mon-Fri,Sun 13:35 Seattle-Tacoma (SEA) 06:50 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 787-10 (781) 9:15 Effective 2026-04-10 through 2026-04-17 The flight arrives 1 day after departure.
Daily 13:35 Seattle-Tacoma (SEA) 06:50 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 787-10 (781) 9:15 Effective 2026-04-18 through 2026-10-23 The flight arrives 1 day after departure.
Sat 13:35 Seattle-Tacoma (SEA) 05:50 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 787-10 (781) 9:15 Operates only on 2026-10-24 The flight arrives 1 day after departure.
Tue 14:25 Seattle-Tacoma (SEA) 07:00 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Effective 2026-03-10 through 2026-03-24 The flight arrives 1 day after departure.
Tue 14:25 Seattle-Tacoma (SEA) 07:00 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Operates only on 2026-10-27 The flight arrives 1 day after departure.
Fri,Sat 14:35 Seattle-Tacoma (SEA) 07:10 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Effective 2026-03-13 through 2026-03-27 The flight arrives 1 day after departure.
Sat 14:35 Seattle-Tacoma (SEA) 08:10 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Operates only on 2026-03-28 The flight arrives 1 day after departure.
Fri,Sat 14:35 Seattle-Tacoma (SEA) 07:10 London Heathrow (LHR) 5 British Airways BA 52 Non-stop Boeing 777 (777) 9:35 Effective from 2026-10-30 The flight arrives 1 day after departure.

An international route departing from Seattle-Tacoma airport, United States (SEA) and arriving at London Heathrow airport, United Kingdom (LHR).
The flight distance is 4783 miles, or 7697 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC+0 . 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 9:15 and 9:35.

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FLIGHT SCHEDULE

Direct Flights:

British Airways BA48

18:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Valid until 2026-03-02

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:30, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

18:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Effective 2026-03-03 through 2026-03-07

Mon
-

Tue

Wed
-

Thu
-

Fri

Sat

Sun
-

Duration: 9:30, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

18:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Effective 2026-03-04 through 2026-03-05

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 9:30, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

19:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Effective 2026-03-08 through 2026-03-22

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:30, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

19:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Effective 2026-03-23 through 2026-03-27

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 9:30, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

19:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Operates only on 2026-10-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 9:30, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

19:50

Seattle-Tacoma (SEA)

12:20(+1)

London Heathrow (LHR) 5

Effective from 2026-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:30, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

20:20

Seattle-Tacoma (SEA)

13:45(+1)

London Heathrow (LHR) 5

Operates only on 2026-03-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 9:25, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

20:20

Seattle-Tacoma (SEA)

13:45(+1)

London Heathrow (LHR) 5

Effective 2026-03-29 through 2026-04-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:25, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

20:20

Seattle-Tacoma (SEA)

13:45(+1)

London Heathrow (LHR) 5

Effective 2026-04-22 through 2026-04-30

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:25, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

20:20

Seattle-Tacoma (SEA)

13:45(+1)

London Heathrow (LHR) 5

Effective 2026-05-01 through 2026-08-31

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:25, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

20:20

Seattle-Tacoma (SEA)

13:45(+1)

London Heathrow (LHR) 5

Effective 2026-09-01 through 2026-09-30

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:25, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA48

20:20

Seattle-Tacoma (SEA)

13:45(+1)

London Heathrow (LHR) 5

Effective 2026-10-01 through 2026-10-23

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:25, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:25

Seattle-Tacoma (SEA)

07:00(+1)

London Heathrow (LHR) 5

Valid until 2026-02-03

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:25

Seattle-Tacoma (SEA)

07:00(+1)

London Heathrow (LHR) 5

Effective 2026-02-17 through 2026-03-03

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:35

Seattle-Tacoma (SEA)

07:10(+1)

London Heathrow (LHR) 5

Valid until 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:35

Seattle-Tacoma (SEA)

06:50(+1)

London Heathrow (LHR) 5

Operates only on 2026-03-30

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:15, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:35

Seattle-Tacoma (SEA)

06:50(+1)

London Heathrow (LHR) 5

Effective 2026-04-01 through 2026-04-08

Mon

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:15, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:35

Seattle-Tacoma (SEA)

06:50(+1)

London Heathrow (LHR) 5

Effective 2026-04-10 through 2026-04-17

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 9:15, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:35

Seattle-Tacoma (SEA)

06:50(+1)

London Heathrow (LHR) 5

Effective 2026-04-18 through 2026-10-23

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 9:15, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

13:35

Seattle-Tacoma (SEA)

05:50(+1)

London Heathrow (LHR) 5

Operates only on 2026-10-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 9:15, non-stop
Boeing 787-10 (781)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

14:25

Seattle-Tacoma (SEA)

07:00(+1)

London Heathrow (LHR) 5

Effective 2026-03-10 through 2026-03-24

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

14:25

Seattle-Tacoma (SEA)

07:00(+1)

London Heathrow (LHR) 5

Operates only on 2026-10-27

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

14:35

Seattle-Tacoma (SEA)

07:10(+1)

London Heathrow (LHR) 5

Effective 2026-03-13 through 2026-03-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

14:35

Seattle-Tacoma (SEA)

08:10(+1)

London Heathrow (LHR) 5

Operates only on 2026-03-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

British Airways BA52

14:35

Seattle-Tacoma (SEA)

07:10(+1)

London Heathrow (LHR) 5

Effective from 2026-10-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Duration: 9:35, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

An international route departing from Seattle-Tacoma airport, United States (SEA) and arriving at London Heathrow airport, United Kingdom (LHR).
The flight distance is 4783 miles, or 7697 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC+0 . 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 9:15 and 9:35.

All SEA-LHR flights

All British Airways flights

Return (LHR-SEA) flights

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