United Airlines
Is UA3931 delayed?
Service date: · Scheduled departure date (America/Los_Angeles)
Arrived
8 min late
Official source · Updated
Departure
San Francisco
SFO
Actual
Scheduled 20:54
Sep 16
Arrival
Los Angeles
LAX
Actual
Scheduled 22:01
Sep 16
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 22 min early
IAH → SFO
- 29 min early
ORD → BUF
- 22 min early
TUL → DEN
- 8 min late
SFO → LAX
- 7 min late
ORD → SFO
Flight history and details
Aug 24, 2026 — Sep 23, 2026
- Observed arrivals
- 7
- Arrivals over 15 minutes late
- 0
- Observed cancellations
- 4
- Observed occurrences
- 11
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 23, 2026Arrived | Houston | San Francisco | -22 | |
| Sep 21, 2026Arrived | Chicago | Buffalo | -29 | |
| Sep 19, 2026Arrived | Tulsa | Denver | -22 | |
| Sep 16, 2026Arrived | San Francisco | Los Angeles | 8 | |
| Sep 14, 2026Arrived | Chicago | San Francisco | 7 | |
| Sep 11, 2026Cancelled | Barcelona | Newark | Not available | Not available |
| Sep 10, 2026Cancelled | Honolulu | Denver | Not available | Not available |
| Sep 10, 2026Cancelled | Lihue | Honolulu | Not available | Not available |
| Sep 9, 2026Cancelled | Denver | Lihue | Not available | Not available |
| Sep 7, 2026Arrived | Chicago | Denver | 0 | |
| Sep 5, 2026Arrived | Newark | Hartford | -8 |