Flight
UAL8121
Flight history and live tracking for UAL8121, operated by United Airlines. Recent flights from the PlaneTrack independent receiver network, with departure and arrival times, aircraft used, and a real-time position feed.
Route
| Airline | United Airlines |
| Observed route | KSFO → KSEA |
Last 30 days
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-08-17estimated | KSFO | KSEA | 18:40 PDT | 04:30 PDT | 9h 49m | N37466 |
| 2026-08-15estimated | KLAS | ? | 00:18 PDT | 15:43Z | 8h 25m | N17422 |
| 2026-07-23 | ? | KLGA | 00:28Z | 22:38 EDT | 2h 09m | N57286 |
Times are local to each airport. Hover for UTC. Flights marked estimated were completed with route prediction or partial coverage.
Data access
Live positions and 365-day history for this flight are available through the PlaneTrack API (commercial use from $29/month) and as one-off CSV extracts from our own receiver network archive. Questions: [email protected]