Flight
UAL543 22 May 2026
UAL543, operated by United Airlines, on 22 May 2026, 3 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 3estimated
PlaneTrack receiver network| Route | KSFO SAN FRANCISCO INTERNATIONAL → ? |
| Status | Completed (receiver network) |
| First seen airborne | 17:00 PDT 21 May |
| Last seen | 00:44Z |
| Duration | 0h 44m |
| Aircraft | N844UA |
| Max altitude | 37,025 ft |
Leg 2 of 3estimated
PlaneTrack receiver network| Route | KBUF BUFFALO NIAGARA INTERNATIONAL → KORD CHICAGO OHARE INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 22:57 EDT 21 May |
| Last seen | 07:42 CDT |
| Duration | 9h 44m |
| Aircraft | N844UA |
| Max altitude | 28,000 ft |
| Distance tracked | 410 nm |
Leg 3 of 3
PlaneTrack receiver network| Route | KORD CHICAGO OHARE INTERNATIONAL → KSFO SAN FRANCISCO INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 12:12 CDT |
| Last seen | 14:18 PDT |
| Duration | 4h 06m |
| Aircraft | N781UA |
| Max altitude | 36,000 ft |
| Distance tracked | 1,600 nm |
Punctuality, last 30 days
| Flights | 14 |
| On time | 6 (43%) |
| Average delay | +27 min |
| Worst delay | +69 min |
In the last 30 days UAL543 departed on time (within 15 minutes) on 6 of 14 flights (43%), with an average departure delay of +27 min and a worst delay of +69 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.