United Airlines UA939 Flight Status
According to Trip.com real-time data, the UA939 flight operated by United Airlines on May 9, 2026 is scheduled to fly from London (LHR) to San Francisco (SFO). The flight is expected to depart at 4:15 PM (local time in London, UTC+1) and land at 6:32 PM (local time in San Francisco, UTC-7) .
Fri, May 8
Sat, May 9
Sun, May 10
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Arrived
The flight has arrived 12m early
11h 10m
Check-in Counter
D
Boarding Gate
B31
Arrival Gate
G7
Baggage
6
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Scheduled
Your flight will depart on time.
11h 10m
Check-in Counter
D
Boarding Gate
--
Arrival Gate
G5
Baggage
--
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Scheduled
Your flight will depart on time.
11h 10m
Check-in Counter
D
Boarding Gate
--
Arrival Gate
--
Baggage
--
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Information provided by VariFlightVariFlight. For real-time updates, please check airport displays or contact your airline. If this is not your flight, you can browse more options for flights from London to San Francisco to find your schedule.
Track the Previous Flight Status: Scheduled
UA930
|
San Francisco (SFO) 
London (LON)
London (LON)Scheduled: 2:10 PM
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UA939 Aircraft Details
According to Trip.com real-time data, the UA939 flight flying from London to San Francisco on 5/9/2026 is operated by the aircraft model Boeing 777-200. This aircraft has been in service for 24y. The aircraft is equipped with 269 seats.
Boeing 777-200
Punctuality (Departure)
87%
Punctuality (Arrival)
100%
Early on average
26 minutes
Age
24y
Seats
269
Flight Distance
--
Economy
Business
First
Premium Economy
In-Flight Services
Meal included
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
79 cm
Legroom
--
Seat width
110°
Reclining Angle
3-4-3
Seat layout example
In-Flight Services
Meal included
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
193 cm
More legroom than on 18% of flights
48 cm
Seat width
180°
Reclining Angle Fully reclinable
1-2-1
Seat layout example
In-Flight Services
Meal included
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
198 cm
More legroom than on 40% of flights
56 cm
Seat width better than on 40% of flights
180°
Reclining Angle Fully reclinable
1-2-1
Seat layout example
In-Flight Services
Meal included
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
86 cm
Legroom
46 cm
Seat width better than on 33% of flights
120°
Reclining Angle
2-4-2
Seat layout example
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Flight History for UA939
Trip.com historical records show that the last UA939 flight departed on Fri, May 8 from LHR at approximately 4:45 PM. This flight is expected to arrrive in SFO at 7:13 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Mon, May 4 | London (LHR) | San Francisco (SFO) | 772 | 4:41 PM | 7:17 PM | Arrived |
| Tue, May 5 | London (LHR) | San Francisco (SFO) | 772 | 5:29 PM | 7:22 PM | Arrived |
| Wed, May 6 | London (LHR) | San Francisco (SFO) | 772 | 4:38 PM | 6:59 PM | Arrived |
| Thu, May 7 | London (LHR) | San Francisco (SFO) | 772 | 4:33 PM | 6:30 PM | Arrived |
| Fri, May 8 | London (LHR) | San Francisco (SFO) | 772 | 4:45 PM | 7:13 PM | Arrived |
| Sat, May 9 | London (LHR) | San Francisco (SFO) | 772 | 4:15 PM | 6:32 PM | Scheduled |
| Sun, May 10 | London (LHR) | San Francisco (SFO) | 772 | 4:15 PM | 7:25 PM | Scheduled |
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UA939 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA939 is 87% (Late on average 22 minutes), and the on-time arrival rate is 100% (Early on average 26 minutes).
On-Time Departures
Punctuality
87%
Late on average 22 minutes
Early
3%
On time
83%
30 mins late
7%
60 mins late
7%
90 mins late
0%
Canceled
2%
On-Time Arrivals
Punctuality
100%
Early on average 26 minutes
Early
93%
On time
7%
30 mins late
0%
60 mins late
0%
90 mins late
0%
Canceled
2%
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Arrival Info: San Francisco Weather & Current Time
Clear
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12°C - 16°C
Weather forecast for your arrival day
-8 hour time difference
Time on arrival: London 03:25| San Francisco 19:25
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