Flight
UAL821 29 Mar 2026
UAL821, operated by United Airlines, on 29 Mar 2026, 3 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 3estimated
PlaneTrack receiver network| Route | Route not recorded |
| Status | Completed (receiver network) |
| First seen airborne | 02:34Z |
| Last seen | 03:28Z |
| Duration | 0h 54m |
| Aircraft | N29984 |
| Max altitude | 39,000 ft |
Leg 2 of 3estimated
PlaneTrack receiver network| Route | Route not recorded |
| Status | Completed (receiver network) |
| First seen airborne | 06:10Z |
| Last seen | 10:56Z |
| Duration | 4h 45m |
| Aircraft | N29984 |
| Max altitude | 39,100 ft |
Leg 3 of 3estimated
PlaneTrack receiver network| Route | VHHH HONG KONG INTERNATIONAL → PHJR Kalaeloa Airport |
| Status | Completed (receiver network) |
| First seen airborne | 22:15 HKT |
| Last seen | 07:46 HST |
| Duration | 3h 30m |
| Aircraft | N23983 |
| Max altitude | 35,000 ft |
| Distance tracked | 4,823 nm |
Punctuality, last 30 days
| Flights | 1 |
| On time | 0 (0%) |
| Average delay | +741 min |
| Worst delay | +741 min |
In the last 30 days UAL821 departed on time (within 15 minutes) on 0 of 1 flight (0%), with an average departure delay of +741 min and a worst delay of +741 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.