UA939 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA939, which currently operates between the airports of London - London Heathrow Airport (Airport Code LHR) and San Francisco - San Francisco International Airport (Airport Code SFO).
This flight data pertains specifically to the flight's details for Tuesday, March 31, 2026.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA939
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA939
UA939 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions. Flight Status
UA939 United Airlines from London
Landed - On-time
Flight Status for Tuesday March 31, 2026
This flight is also scheduled for Today (April 01, 2026). See it here
This flight is also scheduled for Tomorrow (April 02, 2026). See it here
Landed - On-time
Flight Status for Tuesday March 31, 2026
Airline information
United Airlines
Equipment: Boeing 777-200 / 200ER
Departure
London (LHR)
March 31, 2026
London Heathrow Airport
Departed at:
04:07 pm
Terminal:
2
Gate:
B49
Scheduled Departure Time: 04:15 pm
Arrival
San Francisco (SFO)
March 31, 2026
San Francisco International Airport
Arrived at:
06:59 pm
Terminal:
IN - International
Gate:
G5
Scheduled Arrival Time: 07:20 pm
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.airport-sfo.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.
Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- AC3716 - Air Canada
- LH8572 - Lufthansa
- LX3122 - Swiss
- OS7911 - Austrian
- SN9106 - Brussels Airlines
Additional Information
Which is the frequency of flight UA939?
The flight UA939 is scheduled to flight on Monday, Tuesday, Wednesday, Sunday on a weekly basis.
Which is the distance of flight UA939?
The distance between the two airports is 5356 miles.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in London: 2026-04-02 05:24:23
Current Time in San Francisco: 2026-04-01 21:24:23
The flight UA939 is scheduled to flight on Monday, Tuesday, Wednesday, Sunday on a weekly basis.
Which is the distance of flight UA939?
The distance between the two airports is 5356 miles.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in London: 2026-04-02 05:24:23
Current Time in San Francisco: 2026-04-01 21:24:23
Alternative Flights
The following airlines serves the same route between London and San Francisco:
British Airways
- Flight Number: BA285. (On Time performance: 76 - Average Delay: 13 minutes)
- Flight Number: BA287. (On Time performance: 73 - Average Delay: 12 minutes)
United Airlines
- Flight Number: UA900. (On Time performance: 88 - Average Delay: 5 minutes)
- Flight Number: UA949. (On Time performance: 74 - Average Delay: 17 minutes)
Virgin Atlantic
- Flight Number: VS19. (On Time performance: 81 - Average Delay: 10 minutes)
British Airways
- Flight Number: BA285. (On Time performance: 76 - Average Delay: 13 minutes)
- Flight Number: BA287. (On Time performance: 73 - Average Delay: 12 minutes)
United Airlines
- Flight Number: UA900. (On Time performance: 88 - Average Delay: 5 minutes)
- Flight Number: UA949. (On Time performance: 74 - Average Delay: 17 minutes)
Virgin Atlantic
- Flight Number: VS19. (On Time performance: 81 - Average Delay: 10 minutes)
Punctuality and delays
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from September 27, 2025 to October 25, 2025. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from March 30, 2025 to October 25, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.
Note: We have excluded some months from the graph, since the quantity and quality of the data is not representative enough.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from September 27, 2025 to October 25, 2025. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.
Last Past Flights UA939
Date
Departure
Arrival
Duration
Aircraft
Status
Tuesday
31 March
31 March
04:07 pm
London (LHR)
London (LHR)
06:59 pm
San Francisco (SFO)
San Francisco (SFO)
10h 52min
Boeing 777-200
Boeing 777-200
Landed - On-time
Monday
30 March
30 March
04:05 pm
London (LHR)
London (LHR)
07:34 pm
San Francisco (SFO)
San Francisco (SFO)
11h 29min
Boeing 777-200
Boeing 777-200
Landed - On-time
Sunday
29 March
29 March
04:36 pm
London (LHR)
London (LHR)
07:48 pm
San Francisco (SFO)
San Francisco (SFO)
11h 12min
Boeing 777-200
Boeing 777-200
Landed - Delayed