Flight
UAL399 20 May 2026
UAL399, operated by United Airlines, on 20 May 2026. Scheduled and actual times are local to each airport (hover for UTC).
Flightpartial
PlaneTrack receiver network| Route | KIAH GEORGE BUSH INTCNTL HOUSTON → ? |
| Status | Partial record (receiver network) |
| First seen airborne | 19:49 CDT 19 May |
| Aircraft | N878UA |
| Max altitude | 36,050 ft |
Punctuality, last 30 days
| Flights | 7 |
| On time | 5 (71%) |
| Average delay | +17 min |
| Worst delay | +56 min |
In the last 30 days UAL399 departed on time (within 15 minutes) on 5 of 7 flights (71%), with an average departure delay of +17 min and a worst delay of +56 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.