Flight
UAL1523 28 Sep 2026
UAL1523, operated by United Airlines, on 28 Sep 2026: Seattle Tacoma International (KSEA) to Washington Dulles International (KIAD). Scheduled and actual times are local to each airport (hover for UTC).
Flight
FAA SWIM schedule| Route | KSEA SEATTLE TACOMA INTERNATIONAL → KIAD WASHINGTON DULLES INTERNATIONAL |
| Status | Completed, departure delayed +18 min |
| Scheduled departure | 08:25 PDT |
| Actual departure | 08:43 PDT delayed +18 min |
| Actual arrival | 16:12 EDT |
| Duration | 4h 29m |
| Aircraft | N37540 B39M |
| Max altitude | 35,025 ft |
| Distance tracked | 1,998 nm |
Punctuality, last 30 days
| Flights | 7 |
| On time | 1 (14%) |
| Average delay | +18 min |
| Worst delay | +30 min |
In the last 30 days UAL1523 departed on time (within 15 minutes) on 1 of 7 flights (14%), with an average departure delay of +18 min and a worst delay of +30 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.