Flight
UAL521 26 Sep 2026
UAL521, operated by United Airlines, on 26 Sep 2026: George Bush Intcntl Houston (KIAH) to General Edward Lawrence Logan International (KBOS), 2 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 2
FAA SWIM schedule| Route | KIAH GEORGE BUSH INTCNTL HOUSTON → KBOS GENERAL EDWARD LAWRENCE LOGAN INTERNATIONAL |
| Status | Completed |
| Actual departure | 19:02 CDT 25 Sep |
| Actual arrival | 23:26 EDT 25 Sep |
| Duration | 3h 24m |
| Aircraft | N37415 B39M |
| Max altitude | 37,000 ft |
| Distance tracked | 1,386 nm |
Leg 2 of 2
FAA SWIM schedule| Route | KIAH GEORGE BUSH INTCNTL HOUSTON → KMCO ORLANDO INTERNATIONAL |
| Status | Completed, departure delayed +16 min |
| Scheduled departure | 08:30 CDT |
| Actual departure | 08:46 CDT delayed +16 min |
| Actual arrival | 11:36 EDT |
| Duration | 1h 50m |
| Aircraft | N17289 B38M |
Punctuality, last 30 days
| Flights | 7 |
| On time | 3 (43%) |
| Average delay | -496 min |
| Worst delay | +228 min |
In the last 30 days UAL521 departed on time (within 15 minutes) on 3 of 7 flights (43%), with an average departure delay of -496 min and a worst delay of +228 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.