Flight
UAL1139 21 Sep 2026
UAL1139, operated by United Airlines, on 21 Sep 2026, 2 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 2partial
PlaneTrack receiver network| Route | KDEN DENVER INTERNATIONAL → ? |
| Status | Partial record (receiver network) |
| First seen airborne | 19:20 MDT 20 Sep |
| Aircraft | A12B31 |
| Max altitude | 35,025 ft |
Leg 2 of 2partial
PlaneTrack receiver network| Route | KDEN DENVER INTERNATIONAL → ? |
| Status | Partial record (receiver network) |
| First seen airborne | 16:20 MDT |
| Aircraft | N24212 |
| Max altitude | 35,000 ft |
Punctuality, last 30 days
| Flights | 8 |
| On time | 4 (50%) |
| Average delay | +13 min |
| Worst delay | +22 min |
In the last 30 days UAL1139 departed on time (within 15 minutes) on 4 of 8 flights (50%), with an average departure delay of +13 min and a worst delay of +22 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.