Flight
DAL21 29 Sep 2026
DAL21, operated by Delta Air Lines, on 29 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, departed on time (-946 min) |
| Scheduled departure | 17:45 BST |
| Actual departure | 01:59 BST on time |
| Actual arrival | 19:13 PDT |
| Duration | 25h 14m |
| Aircraft | N408DX A339 |
| Max altitude | 40,000 ft |
Punctuality, last 30 days
| Flights | 7 |
| On time | 3 (43%) |
| Average delay | -252 min |
| Worst delay | +35 min |
In the last 30 days DAL21 departed on time (within 15 minutes) on 3 of 7 flights (43%), with an average departure delay of -252 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.