Is UA643 delayed?
Each route and date is shown separately. Confirm that both airports match your booking.
Service date: · Scheduled departure date (America/Los_Angeles)
14 min early
This update may be out of date. Check with your airline.
Update time unavailable
Departure
San Francisco
SFO
Actual
Aug 20
Arrival
Santa Ana
SNA
Estimated
Aug 20
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
- Not available
Service date: · Scheduled departure date (America/Los_Angeles)
Cancelled
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Las Vegas
LAS
Estimated
Aug 20
Arrival
San Francisco
SFO
Estimated
Aug 20
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
- Not available
Service date: · Scheduled departure date (America/Los_Angeles)
Cancelled
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Las Vegas
LAS
Scheduled
Aug 20
Arrival
—
—
Scheduled
Not available
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Not available
- Estimated
- Not available
- Actual
- Not available
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 14 min early
SNA → IAH
- 25 min early
SFO → SNA
- 26 min early
LAS → SFO
- 20 min early
SNA → IAH
- 22 min early
LAS → SFO
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 49
- Arrivals over 15 minutes late
- 2
- Observed cancellations
- 2
- Observed occurrences
- 72
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 15, 2026Arrived | Santa Ana | Houston | -14 | |
| Sep 15, 2026Arrived | San Francisco | Santa Ana | -25 | |
| Sep 15, 2026Arrived | Las Vegas | San Francisco | -26 | |
| Sep 14, 2026Arrived | Santa Ana | Houston | -20 | |
| Sep 14, 2026Arrived | Las Vegas | San Francisco | -22 | |
| Sep 13, 2026Arrived | Santa Ana | Houston | 0 | |
| Sep 13, 2026Arrived | Las Vegas | San Francisco | -20 | |
| Sep 12, 2026Arrived | Santa Ana | Houston | -16 | |
| Sep 12, 2026Arrived | San Francisco | Santa Ana | -2 | |
| Sep 12, 2026Arrived | Las Vegas | San Francisco | -22 | |
| Sep 11, 2026Arrived | Santa Ana | Houston | -22 | |
| Sep 11, 2026Arrived | Las Vegas | San Francisco | -26 | |
| Sep 10, 2026Arrived | Santa Ana | Houston | 0 | |
| Sep 10, 2026Arrived | San Francisco | Santa Ana | -14 | |
| Sep 10, 2026Arrived | Las Vegas | San Francisco | -26 | |
| Sep 9, 2026Arrived | Santa Ana | Houston | -20 | |
| Sep 9, 2026Arrived | San Francisco | Santa Ana | 66 | |
| Sep 9, 2026Arrived | Las Vegas | San Francisco | -22 | |
| Sep 8, 2026Arrived | Santa Ana | Houston | 7 | |
| Sep 8, 2026Arrived | San Francisco | Santa Ana | -25 | |
| Sep 8, 2026Arrived | Las Vegas | San Francisco | -25 | |
| Sep 7, 2026Arrived | Santa Ana | Houston | 4 | |
| Sep 7, 2026Arrived | San Francisco | Santa Ana | -21 | |
| Sep 7, 2026Arrived | Las Vegas | San Francisco | -26 | |
| Sep 6, 2026Arrived | Santa Ana | Houston | -10 | |
| Sep 6, 2026Arrived | San Francisco | Santa Ana | -14 | |
| Sep 6, 2026Arrived | Las Vegas | San Francisco | -26 | |
| Sep 5, 2026Arrived | Santa Ana | Houston | 101 | |
| Sep 5, 2026Arrived | San Francisco | Santa Ana | -18 | |
| Sep 5, 2026Arrived | Las Vegas | San Francisco | -21 | |
| Sep 4, 2026Arrived | Santa Ana | Houston | -2 | |
| Sep 4, 2026Arrived | San Francisco | Santa Ana | -16 | |
| Sep 4, 2026Arrived | Las Vegas | San Francisco | -15 | |
| Sep 3, 2026Arrived | Las Vegas | San Francisco | -31 | |
| Sep 2, 2026Arrived | San Francisco | Santa Ana | -34 | |
| Sep 2, 2026Arrived | Las Vegas | San Francisco | -30 | |
| Sep 1, 2026Arrived | Las Vegas | San Francisco | -30 | |
| Aug 31, 2026Arrived | Las Vegas | San Francisco | -29 | |
| Aug 30, 2026Arrived | Las Vegas | San Francisco | -22 | |
| Aug 29, 2026Arrived | Las Vegas | San Francisco | -21 | |
| Aug 28, 2026Arrived | Las Vegas | San Francisco | -18 | |
| Aug 27, 2026Arrived | Las Vegas | San Francisco | -29 | |
| Aug 26, 2026Arrived | Las Vegas | San Francisco | -25 | |
| Aug 25, 2026Arrived | Las Vegas | San Francisco | -26 | |
| Aug 24, 2026Arrived | Las Vegas | San Francisco | -27 | |
| Aug 23, 2026Arrived | Las Vegas | San Francisco | -25 | |
| Aug 21, 2026Arrived | Las Vegas | San Francisco | -22 | |
| Aug 20, 2026Cancelled | Las Vegas | San Francisco | Not available | Not available |
| Aug 20, 2026Cancelled | Las Vegas | Not available | Not available |