Flight
DAL21 10 Sep 2026
DAL21, operated by Delta Air Lines, on 10 Sep 2026: Slave Lake (CYZH) to Seattle Tacoma International (KSEA), 2 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 2estimated
PlaneTrack receiver network| Route | CYZH SLAVE LAKE → KSEA SEATTLE TACOMA INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 19:15 MDT 9 Sep |
| Last seen | 20:00 PDT 9 Sep |
| Duration | 1h 44m |
| Aircraft | N411DX |
| Max altitude | 40,000 ft |
| Distance tracked | 548 nm |
Leg 2 of 2estimated
PlaneTrack receiver network| Route | EGLL HEATHROW → KSEA SEATTLE TACOMA INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 05:07 BST |
| Last seen | 12:22 PDT |
| Duration | 15h 14m |
| Aircraft | N411DX |
| Max altitude | 38,000 ft |
| Distance tracked | 4,158 nm |
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.