United Airlines
Is UA3900 delayed?
Yes — UA3900 landed in Sacramento 88 min late, at 15:46 on Sep 24 (as of Sep 24, 15:47 UTC). Over its last 6 recorded arrivals, 2 landed more than 15 min late.
88 min late
Official source · Updated
Departure
San Francisco
SFO
Actual
Scheduled 06:49
Sep 24
Arrival
Sacramento
SMF
Actual
Scheduled 14:18
Sep 24
Times shown in airport local time
Service date: · Scheduled departure date (America/Los_Angeles)
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.
- 88 min late
San Francisco → Sacramento
- 10 min early
Omaha → Denver
- 7 min early
Los Angeles → San Francisco
- 25 min late
Chicago → Los Angeles
- On schedule (5 min behind)
San Francisco → Los Angeles
Flight history and details
Aug 29, 2026 — Sep 28, 2026
- Observed arrivals
- 6
- Arrivals over 15 minutes late
- 2
- Observed cancellations
- 3
- 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 24, 2026Arrived | San Francisco | Sacramento | 88 | |
| Sep 22, 2026Arrived | Omaha | Denver | -10 | |
| Sep 21, 2026Cancelled | Dulles | Houston | Not available | Not available |
| Sep 19, 2026Arrived | Los Angeles | San Francisco | -7 | |
| Sep 18, 2026Arrived | Chicago | Los Angeles | 25 | |
| Sep 13, 2026Cancelled | Dublin | Newark | Not available | Not available |
| Sep 10, 2026Arrived | San Francisco | Los Angeles | 5 | |
| Sep 7, 2026Cancelled | Zurich | Newark | Not available | Not available |
| Sep 6, 2026Arrived | San Francisco | Honolulu | -51 |