Delta Air Lines flight DL 20: Seattle-Tacoma - London Heathrow

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FLIGHT SCHEDULE
Direct Flights:
Daily 16:45 Seattle-Tacoma (SEA) 10:30 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-200 (332) 9:45 Valid until 2026-01-31
The flight arrives 1 day after departure.
Daily 16:45 Seattle-Tacoma (SEA) 10:30 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-200 (332) 9:45 Effective 2026-03-01 through 2026-03-07
The flight arrives 1 day after departure.
Daily 16:55 Seattle-Tacoma (SEA) 10:30 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-200 (332) 9:35 Effective 2026-02-01 through 2026-02-28
The flight arrives 1 day after departure.
Daily 17:40 Seattle-Tacoma (SEA) 10:30 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-200 (332) 9:50 Effective 2026-03-08 through 2026-03-27
The flight arrives 1 day after departure.
Daily 17:40 Seattle-Tacoma (SEA) 10:30 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-200 (332) 9:50 Effective from 2026-10-25
The flight arrives 1 day after departure.
Sat 17:48 Seattle-Tacoma (SEA) 10:30 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-200 (332) 9:42 Operates only on 2026-10-24
The flight arrives 1 day after departure.
Daily 20:25 Seattle-Tacoma (SEA) 14:15 London Heathrow (LHR) 3
DL 20 Non-stop Airbus A330-900neo (339) 9:50 Effective 2026-03-28 through 2026-10-23
The flight arrives 1 day after departure.
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Delta Air Lines flight DL 20:
Seattle-Tacoma - London Heathrow
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL20
16:45
Seattle-Tacoma (SEA)

10:30(+1)
London Heathrow (LHR) 3
Valid until 2026-01-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:45, non-stop
Airbus A330-200 (332)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL20
16:45
Seattle-Tacoma (SEA)

10:30(+1)
London Heathrow (LHR) 3
Effective 2026-03-01 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:45, non-stop
Airbus A330-200 (332)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL20
16:55
Seattle-Tacoma (SEA)

10:30(+1)
London Heathrow (LHR) 3
Effective 2026-02-01 through 2026-02-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:35, non-stop
Airbus A330-200 (332)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL20
17:40
Seattle-Tacoma (SEA)

10:30(+1)
London Heathrow (LHR) 3
Effective 2026-03-08 through 2026-03-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:50, non-stop
Airbus A330-200 (332)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL20
17:40
Seattle-Tacoma (SEA)

10:30(+1)
London Heathrow (LHR) 3
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:50, non-stop
Airbus A330-200 (332)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL20
17:48
Seattle-Tacoma (SEA)

10:30(+1)
London Heathrow (LHR) 3
Operates only on 2026-10-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 9:42, non-stop
Airbus A330-200 (332)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL20
20:25
Seattle-Tacoma (SEA)

14:15(+1)
London Heathrow (LHR) 3
Effective 2026-03-28 through 2026-10-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 9:50, non-stop
Airbus A330-900neo (339)
The flight arrives 1 day after departure.
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  • DL 20 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 9:35 and 9:50.
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