Flight
UAL639 21 Sep 2026
UAL639, operated by United Airlines, on 21 Sep 2026. Scheduled and actual times are local to each airport (hover for UTC).
Flightpartial
PlaneTrack receiver network| Route | KBOS GENERAL EDWARD LAWRENCE LOGAN INTERNATIONAL → ? |
| Status | Partial record (receiver network) |
| First seen airborne | 20:25 EDT 20 Sep |
| Aircraft | N77543 |
| Max altitude | 36,000 ft |
Punctuality, last 30 days
| Flights | 8 |
| On time | 3 (38%) |
| Average delay | -281 min |
| Worst delay | +185 min |
In the last 30 days UAL639 departed on time (within 15 minutes) on 3 of 8 flights (38%), with an average departure delay of -281 min and a worst delay of +185 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.