Finnair flight AY 3740: Dallas Fort Worth - London Heathrow

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 16:45 Dallas Fort Worth (DFW) 08:05 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-300ER (77W) 9:20 Effective 2026-03-29 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Thu-Sat 17:10 Dallas Fort Worth (DFW) 08:15 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-200 (772) 9:05 Effective 2026-02-05 through 2026-02-28
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 17:30 Dallas Fort Worth (DFW) 08:35 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-300ER (77W) 9:05 Effective 2026-01-06 through 2026-01-25
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 17:30 Dallas Fort Worth (DFW) 08:35 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-300ER (77W) 9:05 Effective 2026-03-01 through 2026-03-07
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Mon 17:35 Dallas Fort Worth (DFW) 08:35 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-300ER (77W) 9:00 Operates only on 2026-01-05
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 17:40 Dallas Fort Worth (DFW) 08:35 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 787-9 (789) 8:55 Valid until 2026-01-04
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 17:40 Dallas Fort Worth (DFW) 09:00 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-300ER (77W) 9:20 Effective 2026-05-21 through 2026-06-02
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Sat 17:55 Dallas Fort Worth (DFW) 09:00 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 787-9 (789) 9:05 Operates only on 2026-03-28
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 17:55 Dallas Fort Worth (DFW) 09:00 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 787-9 (789) 9:05 Effective 2026-06-03 through 2026-10-23
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 18:00 Dallas Fort Worth (DFW) 08:15 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-300ER (77W) 9:15 Effective 2026-03-08 through 2026-03-27
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Sat 18:10 Dallas Fort Worth (DFW) 08:15 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-200 (772) 9:05 Operates only on 2026-10-24
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.
Daily 18:25 Dallas Fort Worth (DFW) 08:15 London Heathrow (LHR) 3
AY 3740 Non-stop Boeing 777-200 (772) 8:50 Effective from 2026-10-25
Codeshare flight, operated by American Airlines.(AA 20)
The flight arrives 1 day after departure.


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Finnair flight AY 3740:
Dallas Fort Worth - London Heathrow
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Finnair AY3740
16:45
Dallas Fort Worth (DFW)

08:05(+1)
London Heathrow (LHR) 3
Effective 2026-03-29 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:20, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:10
Dallas Fort Worth (DFW)

08:15(+1)
London Heathrow (LHR) 3
Effective 2026-02-05 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:05, non-stop
Boeing 777-200 (772)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:30
Dallas Fort Worth (DFW)

08:35(+1)
London Heathrow (LHR) 3
Effective 2026-01-06 through 2026-01-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:05, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:30
Dallas Fort Worth (DFW)

08:35(+1)
London Heathrow (LHR) 3
Effective 2026-03-01 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:05, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:35
Dallas Fort Worth (DFW)

08:35(+1)
London Heathrow (LHR) 3
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:00, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:40
Dallas Fort Worth (DFW)

08:35(+1)
London Heathrow (LHR) 3
Valid until 2026-01-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 8:55, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:40
Dallas Fort Worth (DFW)

09:00(+1)
London Heathrow (LHR) 3
Effective 2026-05-21 through 2026-06-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:20, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:55
Dallas Fort Worth (DFW)

09:00(+1)
London Heathrow (LHR) 3
Operates only on 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:05, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
17:55
Dallas Fort Worth (DFW)

09:00(+1)
London Heathrow (LHR) 3
Effective 2026-06-03 through 2026-10-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:05, non-stop
Boeing 787-9 (789)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
18:00
Dallas Fort Worth (DFW)

08:15(+1)
London Heathrow (LHR) 3
Effective 2026-03-08 through 2026-03-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:15, non-stop
Boeing 777-300ER (77W)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
18:10
Dallas Fort Worth (DFW)

08:15(+1)
London Heathrow (LHR) 3
Operates only on 2026-10-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 9:05, non-stop
Boeing 777-200 (772)
The flight arrives 1 day after departure.
Direct Codeshare Flights:
Finnair AY3740
18:25
Dallas Fort Worth (DFW)

08:15(+1)
London Heathrow (LHR) 3
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 20)
Duration: 8:50, non-stop
Boeing 777-200 (772)
The flight arrives 1 day after departure.
  • AY 3740 is an international flight departing from Dallas Fort Worth airport, United States (DFW) and arriving at London Heathrow airport, United Kingdom (LHR).
  • The flight distance is 4736 miles, or 7623 km.
  • The timezone of the departure airport is UTC-6 , 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 8:50 and 9:20.
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