Flight
UAL639 23 Sep 2026
UAL639, operated by United Airlines, on 23 Sep 2026: San Francisco International (KSFO) to San Antonio International (KSAT). Scheduled and actual times are local to each airport (hover for UTC).
Flight
PlaneTrack receiver network| Route | KSFO SAN FRANCISCO INTERNATIONAL → KSAT SAN ANTONIO INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 12:46 PDT |
| Last seen | 18:42 CDT |
| Duration | 3h 55m |
| Aircraft | N464UA |
| Max altitude | 39,050 ft |
| Distance tracked | 1,285 nm |
Punctuality, last 30 days
| Flights | 7 |
| On time | 2 (29%) |
| Average delay | -127 min |
| Worst delay | +185 min |
In the last 30 days UAL639 departed on time (within 15 minutes) on 2 of 7 flights (29%), with an average departure delay of -127 min and a worst delay of +185 min.
Schedule, departure and arrival times from the FAA SWIM feed; aircraft, altitude and distance from the PlaneTrack receiver network. On time means a departure within 15 minutes of schedule.