Flight
UAL421
Flight history and live tracking for UAL421, 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.
Next flight
| Date | Sun 23 Aug 2026 |
| Route | KIAD WASHINGTON DULLES INTERNATIONAL → KORD CHICAGO OHARE INTERNATIONAL |
| Scheduled departure | 22:27 EDT |
| Also scheduled | Sun 23 Aug 15:40 MDT |
Scheduled and estimated times from the FAA SWIM feed, local to each airport.
Route
| Airline | United Airlines |
| Observed route | KSNA → KDEN |
Flight history 125 flights since Sep 2025
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-08-22 | KIAD WASHINGTON DULLES INTERNATIONAL | KORD CHICAGO OHARE INTERNATIONAL | 23:12 EDT | 23:36 CDT | 1h 24m | N47330 |
| 2026-08-21 | KDEN DENVER INTERNATIONAL | KIAD WASHINGTON DULLES INTERNATIONAL | 16:12 MDT | 21:08 EDT | 2h 56m | N14521 |
| 2026-08-21 | KIAD WASHINGTON DULLES INTERNATIONAL | KORD CHICAGO OHARE INTERNATIONAL | 23:10 EDT | 23:40 CDT | 1h 30m | N14240 |
| 2026-08-20 | KDEN DENVER INTERNATIONAL | KIAD WASHINGTON DULLES INTERNATIONAL | 16:15 MDT | 21:01 EDT | 2h 46m | N14527 |
| 2026-08-19partial | ? | ? | 00:00Z | N44550 | ||
| 2026-08-18partial | ? | ? | 00:00Z | N54570 | ||
| 2026-08-17partial | ? | ? | 00:40Z | N14566 | ||
| 2026-08-16partial | ? | ? | 00:00Z | N14520 | ||
| 2026-08-15partial | ? | ? | 00:00Z | N14517 | ||
| 2026-08-14partial | ? | ? | 00:00Z | N54525 | ||
| 2026-08-13partial | ? | ? | 00:00Z | N74532 | ||
| 2026-08-12partial | ? | ? | 00:00Z | N14528 | ||
| 2026-08-11estimated | ? | ? | 22:19Z | 23:58Z | 1h 38m | N14528 |
Earlier flights (112) - back to 2025-09-19
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-07-23partial | ? | ? | 00:00Z | A3D2E5 | ||
| 2026-07-22partial | ? | ? | 00:00Z | A3D326 | ||
| 2026-07-21partial | ? | ? | 00:00Z | A0B801 | ||
| 2026-07-20partial | ? | ? | 00:00Z | A6EDA1 | ||
| 2026-07-19partial | ? | ? | 00:00Z | A0B7BB | ||
| 2026-07-18partial | ? | ? | 00:00Z | A0B802 | ||
| 2026-07-17partial | ? | ? | 00:00Z | A24573 | ||
| 2026-07-16partial | ? | ? | 00:00Z | A24573 | ||
| 2026-07-15partial | ? | ? | 00:00Z | A2454F | ||
| 2026-07-14partial | ? | ? | 00:00Z | A6ED61 | ||
| 2026-07-13partial | KIAD | ? | 20:00 EDT | A0B802 | ||
| 2026-07-12partial | KIKK | ? | 19:00 CDT | A0B86C | ||
| 2026-07-11partial | KIAD | ? | 20:00 EDT | A56050 | ||
| 2026-07-10partial | ? | ? | 00:00Z | A0B7BA | ||
| 2026-07-09partial | ? | ? | 00:13Z | A0B7FD | ||
| 2026-07-08partial | KIKK | ? | 19:02 CDT | A0B88B | ||
| 2026-07-07partial | KMDW | ? | 19:00 CDT | A24508 | ||
| 2026-07-06partial | KIAD | ? | 20:00 EDT | A0B841 | ||
| 2026-07-05partial | KIKK | ? | 19:00 CDT | A0B846 | ||
| 2026-07-04partial | KIAD | ? | 20:06 EDT | A6ED3B | ||
| 2026-07-03partial | KIAD | ? | 20:00 EDT | A2452A | ||
| 2026-07-02partial | KIAD | ? | 20:00 EDT | A0B7D8 | ||
| 2026-07-01partial | KIAD | ? | 20:00 EDT | A0B7B7 | ||
| 2026-06-30partial | ? | ? | 00:00Z | A245B7 | ||
| 2026-06-29partial | KIAD | ? | 20:00 EDT | N68823 | ||
| 2026-06-28partial | KIAD | ? | 20:00 EDT | A0B7D9 | ||
| 2026-06-27partial | KIAD | ? | 20:00 EDT | A0B841 | ||
| 2026-06-26partial | KIAD | ? | 20:00 EDT | A0B7B8 | ||
| 2026-06-25partial | KIAD | ? | 20:00 EDT | N67815 | ||
| 2026-06-24partial | KIAD | ? | 20:00 EDT | N14545 | ||
| 2026-06-23partial | KIAD | ? | 20:00 EDT | A0B866 | ||
| 2026-06-22partial | KIAD | ? | 20:00 EDT | A245B7 | ||
| 2026-06-21partial | KIAD | ? | 20:00 EDT | A0B844 | ||
| 2026-06-20partial | KIAD | ? | 20:00 EDT | A0B88D | ||
| 2026-06-19partial | KIAD | ? | 20:00 EDT | A24508 | ||
| 2026-06-18partial | KMKL | ? | 19:00 CDT | A6EDE5 | ||
| 2026-06-17partial | ? | ? | 00:00Z | A0B88A | ||
| 2026-06-16partial | KIAD | ? | 20:00 EDT | A0B844 | ||
| 2026-06-15partial | KIAD | ? | 20:00 EDT | A24508 | ||
| 2026-06-14partial | KIAD | ? | 20:00 EDT | A2452F | ||
| 2026-06-13partial | KIAD | ? | 20:00 EDT | A0B845 | ||
| 2026-06-12partial | KIAD | ? | 20:00 EDT | A2452A | ||
| 2026-06-11estimated | ? | ? | 22:40Z | 23:58Z | 1h 17m | A2452A |
| 2026-05-29partial | KIAD | ? | 20:00 EDT | AA07F9 | ||
| 2026-05-28partial | KHUF | ? | 20:00 EDT | A0B88A | ||
| 2026-05-27partial | KIAD | ? | 20:00 EDT | A55FE9 | ||
| 2026-05-26partial | KIAD | ? | 20:00 EDT | A0B7DE | ||
| 2026-05-25partial | KIKK | ? | 19:00 CDT | A0B7BA | ||
| 2026-05-24partial | KIAD | ? | 20:00 EDT | A2452F | ||
| 2026-05-23partial | KIAD | ? | 20:00 EDT | A0B86C | ||
| 2026-05-22partial | ? | ? | 00:00Z | A0B889 | ||
| 2026-05-21 | KDEN | ? | 15:48 MDT | 23:58Z | 2h 09m | A0B889 |
| 2026-05-20partial | KDEN | ? | 19:16 MDT | N460UA | ||
| 2026-05-19 | KSNA | KBKF | 21:30 PDT | 16:12 MDT | 17h 41m | N459UA |
| 2026-05-12 | KSNA | KDEN | 11:10 PDT | 14:12 MDT | 2h 02m | N430UA |
| 2026-05-11 | KSNA | KDEN | 11:23 PDT | 14:22 MDT | 1h 58m | N448UA |
| 2026-05-10 | KSNA | KDEN | 11:15 PDT | 14:22 MDT | 2h 06m | N443UA |
| 2026-05-09 | KSNA | KDEN | 11:05 PDT | 14:04 MDT | 1h 59m | N494UA |
| 2026-05-08 | KSNA | KDEN | 11:07 PDT | 16:13 MDT | 4h 05m | N478UA |
| 2026-05-07 | KSNA | KDEN | 11:15 PDT | 14:20 MDT | 2h 04m | N480UA |
| 2026-05-06 | KSNA | KDEN | 10:59 PDT | 14:22 MDT | 2h 22m | N438UA |
| 2026-05-05 | KSNA | KDEN | 11:09 PDT | 14:00 MDT | 1h 50m | N442UA |
| 2026-05-04 | KSNA | KDEN | 11:17 PDT | 14:08 MDT | 1h 50m | N480UA |
| 2026-05-03 | KSNA | KDEN | 11:06 PDT | 14:02 MDT | 1h 55m | N454UA |
| 2026-05-02 | KSNA | KDEN | 11:04 PDT | 14:04 MDT | 1h 59m | N495UA |
| 2026-05-01 | KSNA | KDEN | 11:10 PDT | 14:10 MDT | 1h 59m | N432UA |
| 2026-04-30 | KSNA | KDEN | 11:04 PDT | 14:20 MDT | 2h 15m | N477UA |
| 2026-04-29 | KSNA | KDEN | 11:06 PDT | 16:08 MDT | 4h 02m | N834UA |
| 2026-04-28 | KSNA | KDEN | 11:22 PDT | 17:30 MDT | 5h 08m | N896UA |
| 2026-04-27 | KSNA | KDEN | 11:15 PDT | 16:11 MDT | 3h 56m | N847UA |
| 2026-04-26 | KSNA | KDEN | 11:00 PDT | 17:05 MDT | 5h 04m | N853UA |
| 2026-04-25 | KSNA | KDEN | 11:18 PDT | 16:07 MDT | 3h 48m | N836UA |
| 2026-04-24 | KSNA | KDEN | 11:14 PDT | 14:06 MDT | 1h 52m | N459UA |
| 2026-04-23estimated | KIKK | KDEN | 13:05 CDT | 14:12 MDT | 2h 06m | N840UA |
| 2026-04-22estimated | KIKK | KDEN | 13:09 CDT | 14:02 MDT | 1h 52m | N818UA |
| 2026-04-21estimated | KIKK | KDEN | 13:15 CDT | 14:18 MDT | 2h 02m | N840UA |
| 2026-04-20estimated | KIKK | KDEN | 13:14 CDT | 16:10 MDT | 3h 56m | N829UA |
| 2026-04-19estimated | KIKK | KDEN | 13:19 CDT | 14:22 MDT | 2h 02m | N818UA |
| 2026-04-18estimated | KIKK | KDEN | 13:11 CDT | 14:14 MDT | 2h 02m | N836UA |
| 2026-04-17 | KSNA | KDEN | 11:27 PDT | 14:28 MDT | 2h 00m | N494UA |
| 2026-04-16estimated | ? | ? | 18:09Z | 20:12Z | 2h 02m | N473UA |
| 2026-04-15estimated | ? | ? | 18:18Z | 20:20Z | 2h 01m | N498UA |
| 2026-04-14 | KSNA | KDEN | 12:34 PDT | 15:26 MDT | 1h 51m | N484UA |
| 2026-04-13estimated | ? | ? | 19:30Z | 20:00Z | 0h 29m | N823UA |
| 2026-04-12estimated | KIKK | KDEN | 14:09 CDT | 14:16 MDT | 1h 07m | N445UA |
| 2026-04-11 | KSNA | KDEN | 11:22 PDT | 14:22 MDT | 1h 59m | N488UA |
| 2026-04-05estimated | KIKK | KDEN | 13:14 CDT | 14:26 MDT | 2h 12m | N830UA |
| 2026-04-04estimated | KIKK | KDEN | 13:19 CDT | 14:18 MDT | 1h 58m | N873UA |
| 2026-04-03estimated | KIKK | KDEN | 13:17 CDT | 14:24 MDT | 2h 06m | N820UA |
| 2026-04-02 | KSNA | KDEN | 11:21 PDT | 14:16 MDT | 1h 54m | N834UA |
| 2026-03-31estimated | KIKK | KDEN | 13:28 CDT | 14:30 MDT | 2h 01m | N881UA |
| 2026-03-30estimated | KSNA | KBKF | 11:28 PDT | 14:24 MDT | 1h 55m | N820UA |
| 2026-03-29partial | ? | ? | 00:01Z | N497UA | ||
| 2026-03-28estimated | ? | ? | 18:19Z | 23:56Z | 5h 36m | N47275 |
| 2026-03-16 | ? | KSDF | 00:35Z | 09:10 EDT | 12h 34m | N844UA |
| 2026-03-15partial | KIKK | ? | 19:00 CDT | N829UA | ||
| 2026-03-14partial | KDEN | ? | 18:30 MDT | N834UA | ||
| 2026-03-13partial | ? | ? | 02:11Z | N804UA | ||
| 2025-10-02 | ? | KMKE | 00:00Z | 20:44 CDT | 1h 43m | AAA5AE |
| 2025-10-01 | ? | KMKE | 00:00Z | 20:42 CDT | 1h 42m | AA56D4 |
| 2025-09-30 | KDEN Denver International | KMKE | 19:28 MDT | 22:23 CDT | 1h 55m | A94BFC |
| 2025-09-29 | KDEN Denver International | KMKE | 18:23 MDT | 21:17 CDT | 1h 53m | A05DD8 |
| 2025-09-28 | KDEN Denver International | KMKE | 18:10 MDT | 21:08 CDT | 1h 57m | A43E5C |
| 2025-09-27 | KDEN Denver International | KMKE | 18:10 MDT | 20:58 CDT | 1h 48m | A1235B |
| 2025-09-26 | ? | KMKE | 00:00Z | 20:50 CDT | 1h 49m | AA56B4 |
| 2025-09-25 | KDEN Denver International | ? | 18:23 MDT | 01:29Z | 1h 06m | A92361 |
| 2025-09-24 | KDEN Denver International | ? | 18:23 MDT | 01:29Z | 1h 06m | A46D4F |
| 2025-09-23 | KDEN Denver International | KMKE | 18:50 MDT | 21:57 CDT | 2h 06m | A6C247 |
| 2025-09-22 | KDEN Denver International | KMKE | 18:18 MDT | 21:04 CDT | 1h 46m | A6C247 |
| 2025-09-21 | KDEN Denver International | KMKE | 18:08 MDT | 20:52 CDT | 1h 44m | A923A8 |
| 2025-09-20 | KDEN Denver International | KMKE | 18:08 MDT | 20:53 CDT | 1h 44m | A837A3 |
| 2025-09-19 | KDEN Denver International | KMKE | 18:03 MDT | 20:59 CDT | 1h 56m | A92384 |
Times are local to each airport. Hover for UTC. Flights marked estimated were completed with route prediction or partial coverage; partial records have a confirmed departure but no reliable arrival fix.
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]