Flight
UAL8121 29 Mar 2026
UAL8121, operated by United Airlines, on 29 Mar 2026: Seattle Tacoma International (KSEA) to Moffett Federal Afld (KNUQ). Scheduled and actual times are local to each airport (hover for UTC).
Flight
PlaneTrack receiver network| Route | KSEA SEATTLE TACOMA INTERNATIONAL → KNUQ MOFFETT FEDERAL AFLD |
| Status | Completed (receiver network) |
| First seen airborne | 15:23 PDT |
| Last seen | 16:58 PDT |
| Duration | 1h 35m |
| Aircraft | N472UA |
| Max altitude | 39,050 ft |
| Distance tracked | 602 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.