KLM flight KL 6021: Seattle-Tacoma - London Heathrow

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon-Thu,Sat,Sun 18:55 Seattle-Tacoma (SEA) 12:40 London Heathrow (LHR) 3
KL 6021 Non-stop Airbus A330-900neo (339) 9:45 Effective from 2025-11-02
Codeshare flight, operated by Delta Air Lines.(DL 20)
The flight arrives 1 day after departure.
Fri 19:25 Seattle-Tacoma (SEA) 13:10 London Heathrow (LHR) 3
KL 6021 Non-stop Airbus A330-900neo (339) 9:45 Effective from 2025-11-07
Codeshare flight, operated by Delta Air Lines.(DL 20)
The flight arrives 1 day after departure.
Mon-Thu,Sat,Sun 19:55 Seattle-Tacoma (SEA) 12:40 London Heathrow (LHR) 3
KL 6021 Non-stop Airbus A330-900neo (339) 9:45 Effective 2025-10-26 through 2025-11-01
Codeshare flight, operated by Delta Air Lines.(DL 20)
The flight arrives 1 day after departure.
Daily 20:20 Seattle-Tacoma (SEA) 14:15 London Heathrow (LHR) 3
KL 6021 Non-stop Airbus A330-900neo (339) 9:55 Valid until 2025-05-31
Codeshare flight, operated by Delta Air Lines.(DL 20)
The flight arrives 1 day after departure.
Daily 20:25 Seattle-Tacoma (SEA) 14:15 London Heathrow (LHR) 3
KL 6021 Non-stop Airbus A330-900neo (339) 9:50 Effective 2025-06-01 through 2025-10-24
Codeshare flight, operated by Delta Air Lines.(DL 20)
The flight arrives 1 day after departure.
Fri,Sat 20:25 Seattle-Tacoma (SEA) 13:10 London Heathrow (LHR) 3
KL 6021 Non-stop Airbus A330-900neo (339) 9:45 Effective 2025-10-25 through 2025-10-31
Codeshare flight, operated by Delta Air Lines.(DL 20)
The flight arrives 1 day after departure.
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KLM flight KL 6021:
Seattle-Tacoma - London Heathrow
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
KLM KL6021
18:55
Seattle-Tacoma (SEA)

12:40(+1)
London Heathrow (LHR) 3
Effective from 2025-11-02
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 20)
Duration: 9:45, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
KLM KL6021
19:25
Seattle-Tacoma (SEA)

13:10(+1)
London Heathrow (LHR) 3
Effective from 2025-11-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 20)
Duration: 9:45, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
KLM KL6021
19:55
Seattle-Tacoma (SEA)

12:40(+1)
London Heathrow (LHR) 3
Effective 2025-10-26 through 2025-11-01
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 20)
Duration: 9:45, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
KLM KL6021
20:20
Seattle-Tacoma (SEA)

14:15(+1)
London Heathrow (LHR) 3
Valid until 2025-05-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 20)
Duration: 9:55, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
KLM KL6021
20:25
Seattle-Tacoma (SEA)

14:15(+1)
London Heathrow (LHR) 3
Effective 2025-06-01 through 2025-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 20)
Duration: 9:50, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
KLM KL6021
20:25
Seattle-Tacoma (SEA)

13:10(+1)
London Heathrow (LHR) 3
Effective 2025-10-25 through 2025-10-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 20)
Duration: 9:45, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
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Parallax here SEA-LHR
  • KL 6021 is an international flight 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 9:45 and 9:55.
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