Flight
UAL521 27 Sep 2026
UAL521, operated by United Airlines, on 27 Sep 2026: George Bush Intcntl Houston (KIAH) to General Edward Lawrence Logan International (KBOS). Scheduled and actual times are local to each airport (hover for UTC).
Flight
FAA SWIM schedule| Route | KIAH GEORGE BUSH INTCNTL HOUSTON → KBOS GENERAL EDWARD LAWRENCE LOGAN INTERNATIONAL |
| Status | Completed, departure delayed +228 min |
| Scheduled departure | 18:35 CDT |
| Actual departure | 22:23 CDT delayed +228 min |
| Actual arrival | 02:36 EDT 28 Sep |
| Duration | 3h 13m |
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.