Flight
DAL20 30 Sep 2026
DAL20, operated by Delta Air Lines, on 30 Sep 2026: Seattle Tacoma International (KSEA) to Heathrow (EGLL). Scheduled and actual times are local to each airport (hover for UTC).
Flight
FAA SWIM schedule| Route | KSEA SEATTLE TACOMA INTERNATIONAL → EGLL HEATHROW |
| Status | Completed (arrival not recorded), departed on time (-139 min) |
| Scheduled departure | 21:50 PDT 29 Sep |
| Actual departure | 19:31 PDT 29 Sep on time |
| Estimated arrival | 14:49 BST |
| Aircraft | N407DX A339 |
Punctuality, last 30 days
| Flights | 6 |
| On time | 3 (50%) |
| Average delay | -36 min |
| Worst delay | +28 min |
In the last 30 days DAL20 departed on time (within 15 minutes) on 3 of 6 flights (50%), with an average departure delay of -36 min and a worst delay of +28 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.