Flight
UAL1423 23 Sep 2026
UAL1423, operated by United Airlines, on 23 Sep 2026: Philadelphia International (KPHL) to Denver International (KDEN). Scheduled and actual times are local to each airport (hover for UTC).
Flight
PlaneTrack receiver network| Route | KPHL PHILADELPHIA INTERNATIONAL → KDEN DENVER INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 08:12 EDT |
| Last seen | 10:02 MDT |
| Duration | 3h 49m |
| Aircraft | N78509 |
| Max altitude | 36,000 ft |
| Distance tracked | 1,349 nm |
Punctuality, last 30 days
| Flights | 16 |
| On time | 8 (50%) |
| Average delay | +16 min |
| Worst delay | +34 min |
In the last 30 days UAL1423 departed on time (within 15 minutes) on 8 of 16 flights (50%), with an average departure delay of +16 min and a worst delay of +34 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.