Flight
UAL2121
Flight history and live tracking for UAL2121, 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 | KDEN → KGRR |
Last 30 days
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-08-18estimated | KDEN | KGRR | 18:02 MDT | 08:23 EDT | 12h 20m | N38417 |
| 2026-08-17estimated | KDEN | KGRR | 18:40 MDT | 22:30 EDT | 1h 49m | N68891 |
| 2026-08-16estimated | KDEN | KGRR | 20:13 MDT | 00:20 EDT | 2h 06m | N36447 |
| 2026-08-14estimated | KDEN | KGRR | 22:07 MDT | 08:12 EDT | 8h 04m | N68802 |
| 2026-08-13estimated | KDEN | KGRR | 20:20 MDT | 08:09 EDT | 9h 48m | N78448 |
| 2026-08-12estimated | KDEN | KGRR | 18:38 MDT | 08:11 EDT | 11h 32m | N81449 |
| 2026-07-23estimated | KDEN | KGRR | 21:45 MDT | 01:44 EDT | 1h 58m | N62884 |
| 2026-07-22estimated | KDEN | KGRR | 18:19 MDT | 22:18 EDT | 1h 58m | N17244 |
| 2026-07-21estimated | KDEN | KGRR | 18:23 MDT | 22:34 EDT | 2h 10m | N65832 |
| 2026-07-20estimated | KDEN | KGRR | 18:20 MDT | 22:54 EDT | 2h 33m | N37465 |
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]