Is UA939 delayed?
Service date: · Scheduled departure date (Europe/London)
Arrived
40 min late
Official source · Updated
Departure
London
LHR
Actual
Scheduled 16:15
Aug 28
Arrival
San Francisco
SFO
Actual
Scheduled 19:10
Aug 28
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 41 min early
LHR → SFO
- 10 min early
LHR → SFO
- 3 min late
LHR → SFO
- 39 min late
LHR → SFO
- 12 min early
LHR → SFO
Flight history and details
Aug 18, 2026 — Sep 17, 2026
- Observed arrivals
- 27
- Arrivals over 15 minutes late
- 3
- Observed cancellations
- 1
- Observed occurrences
- 30
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 16, 2026Arrived | London | San Francisco | -41 | |
| Sep 15, 2026Arrived | London | San Francisco | -10 | |
| Sep 14, 2026Arrived | London | San Francisco | 3 | |
| Sep 13, 2026Arrived | London | San Francisco | 39 | |
| Sep 12, 2026Arrived | London | San Francisco | -12 | |
| Sep 11, 2026Arrived | London | San Francisco | -3 | |
| Sep 10, 2026Arrived | London | San Francisco | 13 | |
| Sep 9, 2026Arrived | London | San Francisco | -17 | |
| Sep 7, 2026Arrived | London | San Francisco | -1 | |
| Sep 6, 2026Arrived | London | San Francisco | -6 | |
| Sep 5, 2026Arrived | London | San Francisco | -2 | |
| Sep 4, 2026Arrived | London | San Francisco | 13 | |
| Sep 3, 2026Arrived | London | San Francisco | -7 | |
| Sep 2, 2026Arrived | London | San Francisco | 1 | |
| Sep 1, 2026Arrived | London | San Francisco | 8 | |
| Aug 31, 2026Arrived | London | San Francisco | 9 | |
| Aug 30, 2026Arrived | London | San Francisco | -12 | |
| Aug 29, 2026Arrived | London | San Francisco | -6 | |
| Aug 28, 2026Arrived | London | San Francisco | 40 | |
| Aug 27, 2026Arrived | London | San Francisco | 3 | |
| Aug 26, 2026Arrived | London | San Francisco | -2 | |
| Aug 25, 2026Arrived | London | San Francisco | -13 | |
| Aug 24, 2026Arrived | London | San Francisco | -15 | |
| Aug 23, 2026Arrived | London | San Francisco | -10 | |
| Aug 22, 2026Arrived | London | San Francisco | 2 | |
| Aug 21, 2026Arrived | London | San Francisco | 386 | |
| Aug 20, 2026Cancelled | London | San Francisco | Not available | Not available |
| Aug 19, 2026Arrived | London | San Francisco | -6 |