Flight
DAL21 25 Sep 2026
DAL21, operated by Delta Air Lines, on 25 Sep 2026: Heathrow (EGLL) to Seattle Tacoma International (KSEA). Scheduled and actual times are local to each airport (hover for UTC).
Flight
FAA SWIM schedule| Route | EGLL HEATHROW → KSEA SEATTLE TACOMA INTERNATIONAL |
| Status | Completed, departure delayed +35 min |
| Scheduled departure | 17:45 BST |
| Actual departure | 18:20 BST delayed +35 min |
| Actual arrival | 19:57 PDT |
| Duration | 9h 37m |
| Aircraft | N404DX A339 |
| Max altitude | 40,000 ft |
Punctuality, last 30 days
| Flights | 8 |
| On time | 4 (50%) |
| Average delay | -345 min |
| Worst delay | +35 min |
In the last 30 days DAL21 departed on time (within 15 minutes) on 4 of 8 flights (50%), with an average departure delay of -345 min and a worst delay of +35 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.