Flight
UAL2121 4 Apr 2026
UAL2121, operated by United Airlines, on 4 Apr 2026, 3 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 3partial
PlaneTrack receiver network| Route | Route not recorded |
| Status | Partial record (receiver network) |
| First seen airborne | 00:00Z |
| Aircraft | N69839 |
| Max altitude | 35,025 ft |
| Distance tracked | 879 nm |
Leg 2 of 3
PlaneTrack receiver network| Route | KSFO SAN FRANCISCO INTERNATIONAL → KDEN DENVER INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 12:54 PDT |
| Last seen | 16:08 MDT |
| Duration | 2h 13m |
| Aircraft | N69835 |
| Max altitude | 31,000 ft |
| Distance tracked | 838 nm |
Leg 3 of 3estimated
PlaneTrack receiver network| Route | KDEN DENVER INTERNATIONAL → KGRR GERALD R FORD INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 17:30 MDT |
| Last seen | 19:58 EDT |
| Duration | 0h 27m |
| Aircraft | N69835 |
| Max altitude | 5,025 ft |
| Distance tracked | 879 nm |
Punctuality, last 30 days
| Flights | 7 |
| On time | 6 (86%) |
| Average delay | -1204 min |
| Worst delay | +37 min |
In the last 30 days UAL2121 departed on time (within 15 minutes) on 6 of 7 flights (86%), with an average departure delay of -1204 min and a worst delay of +37 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.