United Airlines flight UA 6921: London Heathrow - Istanbul

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Select flight date:  Show Calendar
FLIGHT SCHEDULE
Direct Codeshare Flights:
Fri,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Valid until 2025-05-02
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue-Thu 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Valid until 2025-05-06
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Thu,Sat,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-05-03 through 2025-05-08
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Mon,Sat 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 777-300ER (77W) 4:00 Effective 2025-05-05 through 2025-05-31
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Wed 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-200 (332) 4:00 Operates only on 2025-05-07
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Wed,Fri 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-05-09 through 2025-05-16
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Thu,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-05-11 through 2025-05-18
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Thu,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-05-20 through 2025-05-25
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Wed,Fri 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-05-21 through 2025-06-04
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Thu 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-05-29 through 2025-06-05
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Mon,Sat,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 777-300ER (77W) 4:00 Effective 2025-06-01 through 2025-06-07
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Thu,Fri,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-06-06 through 2025-06-12
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Mon,Wed 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 787-9 (789) 4:00 Effective 2025-06-09 through 2025-07-02
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Fri 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-06-13 through 2025-07-04
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Sat 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 777-300ER (77W) 4:00 Effective 2025-06-14 through 2025-06-28
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Thu,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-06-15 through 2025-07-06
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Thu,Sat 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-07-05 through 2025-07-10
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Mon,Sat 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 777-300ER (77W) 4:00 Effective 2025-07-07 through 2025-09-06
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Wed,Fri,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 787-9 (789) 4:00 Effective 2025-07-09 through 2025-09-10
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Thu 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-07-15 through 2025-09-09
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Mon,Thu 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-09-08 through 2025-10-06
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Fri,Sat 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 777-300ER (77W) 4:00 Effective 2025-09-12 through 2025-10-04
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-09-14 through 2025-10-07
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Wed 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 787-9 (789) 4:00 Effective 2025-09-17 through 2025-10-08
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Wed-Fri,Sun 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 787-9 (789) 4:00 Effective 2025-10-09 through 2025-10-24
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Sat 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Boeing 777-300ER (77W) 4:00 Effective 2025-10-11 through 2025-10-25
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Mon 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A350-900 (359) 4:00 Effective 2025-10-13 through 2025-10-20
Codeshare flight, operated by Turkish Airlines.(TK 1986)
Tue 16:40 London Heathrow (LHR) 2 22:40 Istanbul (IST)
UA 6921 Non-stop Airbus A330-300 (333) 4:00 Effective 2025-10-14 through 2025-10-21
Codeshare flight, operated by Turkish Airlines.(TK 1986)
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United Airlines flight UA 6921:
London Heathrow - Istanbul
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Select flight date:  Show Calendar
FLIGHT SCHEDULE
Direct Codeshare Flights:
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Valid until 2025-05-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Valid until 2025-05-06
Mon
-
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-03 through 2025-05-08
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-05 through 2025-05-31
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 777-300ER (77W)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Operates only on 2025-05-07
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-200 (332)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-09 through 2025-05-16
Mon
-
Tue
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-11 through 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-20 through 2025-05-25
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-21 through 2025-06-04
Mon
-
Tue
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-05-29 through 2025-06-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-06-01 through 2025-06-07
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 777-300ER (77W)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-06-06 through 2025-06-12
Mon
-
Tue
Wed
-
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-06-09 through 2025-07-02
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 787-9 (789)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-06-13 through 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-06-14 through 2025-06-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 777-300ER (77W)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-06-15 through 2025-07-06
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-07-05 through 2025-07-10
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-07-07 through 2025-09-06
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 777-300ER (77W)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-07-09 through 2025-09-10
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 787-9 (789)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-07-15 through 2025-09-09
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-09-08 through 2025-10-06
Mon
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-09-12 through 2025-10-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 777-300ER (77W)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-09-14 through 2025-10-07
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-09-17 through 2025-10-08
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 787-9 (789)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-10-09 through 2025-10-24
Mon
-
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 787-9 (789)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-10-11 through 2025-10-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Boeing 777-300ER (77W)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-10-13 through 2025-10-20
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A350-900 (359)
United Airlines UA6921
16:40
London Heathrow (LHR) 2

22:40
Istanbul (IST)
Effective 2025-10-14 through 2025-10-21
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Turkish Airlines. (TK 1986)
Duration: 4:00, non-stop
Airbus A330-300 (333)
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  • UA 6921 is an international flight departing from London Heathrow airport, United Kingdom (LHR) and arriving at Istanbul airport, Turkey (IST).
  • The flight distance is 1545 miles, or 2487 km.
  • The timezone of the departure airport is UTC+0 (plus 1h DST), and the timezone of the arrival airport is UTC+3 . Current time at the point of departure is 4:49am, and 6:49am at the point of arrival. There is a 2 hour time difference between the airports.
  • For direct flights, the flight time is 4:00.
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All LHR-IST flights
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