Flight
UAL8121 29 Aug 2026
UAL8121, operated by United Airlines, on 29 Aug 2026: San Francisco International (KSFO) to Chicago Ohare International (KORD). Scheduled and actual times are local to each airport (hover for UTC).
Flight
PlaneTrack receiver network| Route | KSFO SAN FRANCISCO INTERNATIONAL → KORD CHICAGO OHARE INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 10:05 PDT |
| Last seen | 15:58 CDT |
| Duration | 3h 52m |
| Aircraft | N75851 |
| Max altitude | 35,025 ft |
| Distance tracked | 1,600 nm |
Punctuality, last 30 days
| Flights | 6 |
| On time | 1 (17%) |
| Average delay | +53 min |
| Worst delay | +156 min |
In the last 30 days UAL8121 departed on time (within 15 minutes) on 1 of 6 flights (17%), with an average departure delay of +53 min and a worst delay of +156 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.