UA939 Aircraft Details
According to Trip.com real-time data, the UA939 flight flying from London to San Francisco on 7/2/2026 is operated by the aircraft model Boeing 787-9. This aircraft has been in service for 4m. The aircraft is equipped with 252 seats.

Boeing 787-9
Punctuality (Departure)
33%
Punctuality (Arrival)
90%
Early on average
5 minutes
Age
4m
Seats
252
Flight Distance
--
Economy
Business
Premium Economy
In-Flight Services
Meal included
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
81 cm
More legroom than on 63% of flights
--
Seat width
100°
Reclining Angle
3-3-3
Seat layout example
In-Flight Services
Meal included
Seatback entertainment system
Wi-Fi (additional charge)
USB port and power outlet
Seat Information
198 cm
More legroom than on 50% of flights
52 cm
Seat width better than on 50% 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
89 cm
Legroom
44 cm
Seat width
110°
Reclining Angle
2-3-2
Seat layout example
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Flight History for UA939
Trip.com historical records show that the last UA939 flight departed on Wed, Jul 1 from LHR at approximately 4:41 PM. This flight is expected to arrrive in SFO at 6:47 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Sun, Jun 28 | London (LHR) | San Francisco (SFO) | 789 | 4:45 PM | 6:34 PM | Arrived |
| Mon, Jun 29 | London (LHR) | San Francisco (SFO) | 789 | 4:54 PM | 6:42 PM | Arrived |
| Tue, Jun 30 | London (LHR) | San Francisco (SFO) | 789 | 5:00 PM | 6:56 PM | Arrived |
| Wed, Jul 1 | London (LHR) | San Francisco (SFO) | 789 | 4:41 PM | 6:47 PM | Arrived |
| Thu, Jul 2 | London (LHR) | San Francisco (SFO) | 789 | 4:22 PM | 6:26 PM | Scheduled |
| Fri, Jul 3 | London (LHR) | San Francisco (SFO) | 789 | 4:15 PM | 7:10 PM | Scheduled |
| Sat, Jul 4 | London (LHR) | San Francisco (SFO) | 789 | 4:15 PM | 7:10 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 33% (Late on average 45 minutes), and the on-time arrival rate is 90% (Early on average 5 minutes).
On-Time Departures
Punctuality
33%
Late on average 45 minutes
Early
0%
On time
33%
30 mins late
53%
60 mins late
3%
90 mins late
10%
Canceled
1%
On-Time Arrivals
Punctuality
90%
Early on average 5 minutes
Early
77%
On time
13%
30 mins late
7%
60 mins late
0%
90 mins late
3%
Canceled
1%
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