United Airlines
flight
UA 6921:
London Heathrow - Istanbul
London Heathrow - Istanbul
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FLIGHT SCHEDULE
Direct Codeshare Flights:
United Airlines UA6921
Valid until 2026-01-05
Mon
Tue
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Boeing 787-9 (789)
Direct Codeshare Flights:
United Airlines UA6921
Valid until 2026-01-29
Mon
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Tue
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Wed
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Thu
Fri
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Sat
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A350-900 (359)
Direct Codeshare Flights:
United Airlines UA6921
Valid until 2026-01-06
Mon
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Tue
Wed
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Thu
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Fri
Sat
Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-01-07 through 2026-01-14
Mon
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Tue
Wed
Thu
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Fri
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Sat
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Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-01-09 through 2026-02-27
Mon
Tue
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Wed
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Thu
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Fri
Sat
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Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Boeing 787-9 (789)
Direct Codeshare Flights:
United Airlines UA6921
Operates only on 2026-01-10
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-200 (332)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-01-17 through 2026-01-28
Mon
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Tue
Wed
Thu
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Fri
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Sat
Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Operates only on 2026-01-31
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:45, non-stop Airbus A330-200 (332)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-02-01 through 2026-02-11
Mon
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Tue
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Wed
Thu
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Fri
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Sat
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Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-02-03 through 2026-02-14
Mon
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Tue
Wed
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Thu
Fri
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Sat
Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A350-900 (359)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-02-15 through 2026-02-21
Mon
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Tue
Wed
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Thu
Fri
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-
Sat
Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A350-900 (359)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-02-18 through 2026-03-04
Mon
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Tue
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Wed
Thu
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Fri
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Sat
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Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-02-24 through 2026-03-05
Mon
Tue
Wed
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-
Thu
Fri
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-
Sat
Sun
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-
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A350-900 (359)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-06 through 2026-03-13
Mon
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Tue
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Wed
Thu
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Fri
Sat
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-
Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-07 through 2026-03-09
Mon
Tue
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-
Wed
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Thu
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Fri
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-
Sat
Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Boeing 787-9 (789)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-10 through 2026-03-19
Mon
-
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Tue
Wed
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Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A350-900 (359)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-14 through 2026-03-22
Mon
-
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Tue
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Wed
Thu
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Fri
Sat
Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-16 through 2026-03-23
Mon
Tue
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Wed
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Thu
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Fri
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Sat
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Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Boeing 787-9 (789)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-24 through 2026-03-28
Mon
-
-
Tue
Wed
Thu
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-
Fri
Sat
Sun
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-
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A330-300 (333)
Direct Codeshare Flights:
United Airlines UA6921
Operates only on 2026-03-26
Mon
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Tue
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Wed
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Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:50, non-stop Airbus A350-900 (359)
Direct Codeshare Flights:
United Airlines UA6921
Effective 2026-03-29 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Turkish Airlines.
(TK 1986)
Duration: 3:45, non-stop Airbus A330-300 (333)
Ad mobi box here (300x250px) 8888825773 M FlightWNum Bottom Box
Parallax here LHR-IST
- 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 , and the timezone of the arrival airport is UTC+3 . 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 3:45 and 3:50.