YAFT.LIVE

UAL421

DEN → IAD · Airbus A321 Neo · United Airlines

For travellers

Departure · Denver (DEN)

Gate B25
Scheduled 29 Sep 15:45 · Departed 29 Sep 15:43
Board status: Off block
Airborne since 29 Sep 15:43 (ADS-B)

Board data from den, updated 3072 min ago; times local to each airport.

Flight

Status
Completed
Arrival confirmed via
ADS-B (callsign change)
Departure
Denver International Airport (DEN) — Denver, United States
Scheduled departure
2026-09-29 21:45 UTC
Departed
2026-09-29 21:43 UTC
Arrival
Washington Dulles International Airport (IAD) — Washington, DC, United States
Also flies as
UA421
Distance flown
2410 km
Straight-line distance
2332 km
Approach distance
117 km

Aircraft

Registration
N14559
Type
Airbus A321 Neo
CO2 (EMEP est., total)
54.2 t (184 kg/pax Economy, 543 kg/pax Business)

Altitude & speed

Max altitude
35,000 ft
Max ground speed
512 kt
Tracked
4h 46m · 2,406 km
Altitude (ft, max 35,000)
018,90037,8000m1h 0m2h 0m3h 0m4h 0m
Ground speed (kt, max 512)
02765530m1h 0m2h 0m3h 0m4h 0m
Altitude (ft, max 35,000)
018,90037,8000m2h 0m4h 0m
Ground speed (kt, max 512)
02765530m2h 0m4h 0m

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-02 05:05 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N34535 Airbus A321 Neo Completed 1044 km
2026-10-01 22:58 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N34535 Airbus A321 Neo Completed 2374 km
2026-10-01 17:49 UTC UAL421 SJC → DEN
San Jose → Denver
 N69826 Boeing 737-900 Completed 1709 km
2026-10-01 02:36 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N14566 Airbus A321 Neo Completed 995 km
2026-09-30 21:42 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14512 Airbus A321 Neo Completed 2514 km
2026-09-30 02:52 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N54570 Airbus A321 Neo Completed 1016 km
2026-09-29 21:43 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14559 Airbus A321 Neo Completed 2410 km
2026-09-29 02:50 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N54525 Airbus A321 Neo Completed 1039 km
2026-09-28 22:12 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14569 Airbus A321 Neo Completed 2532 km
2026-09-28 02:58 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N61882 Boeing 737-900 Completed 1056 km
2026-09-27 21:43 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14528 Airbus A321 Neo Completed 2430 km
2026-09-27 02:15 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N78438 Boeing 737-900 Completed 1042 km
2026-09-26 21:45 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N17550 Boeing 737 MAX 9 Completed 2437 km
2026-09-26 00:39 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14511 Airbus A321 Neo Completed 2533 km
2026-09-25 02:24 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N14559 Airbus A321 Neo Completed 1032 km
2026-09-24 21:44 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14564 Airbus A321 Neo Completed 2513 km
2026-09-24 02:56 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N36472 Boeing 737-900 Completed 1036 km
2026-09-23 21:37 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14557 Airbus A321 Neo Completed 2404 km
2026-09-23 02:56 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N76532 Boeing 737-800 Completed 1035 km
2026-09-22 21:59 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14531 Airbus A321 Neo Completed 2419 km
2026-09-22 02:54 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N77430 Boeing 737-900 Completed 1035 km
2026-09-21 21:41 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14531 Airbus A321 Neo Completed 2406 km
2026-09-21 03:27 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N68452 Boeing 737-900 Completed 1040 km
2026-09-20 22:01 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14548 Airbus A321 Neo Completed 2404 km
2026-09-20 02:41 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N38473 Boeing 737-900 Completed 1615 km
2026-09-19 21:36 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N34562 Airbus A321 Neo Completed 2596 km
2026-09-19 03:08 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N79541 Boeing 737-800 Completed 1084 km
2026-09-18 21:47 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N34547 Airbus A321 Neo Completed 2631 km
2026-09-18 04:34 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N87531 Boeing 737-800 Completed 1107 km
2026-09-17 21:34 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14509 Airbus A321 Neo Completed 2510 km
2026-09-17 02:21 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N24211 Boeing 737-800 Completed 1105 km
2026-09-16 21:37 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14576 Airbus A321 Neo Completed 2535 km
2026-09-16 02:17 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N35236 Boeing 737-800 Completed 1151 km
2026-09-15 21:36 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N54543 Airbus A321 Neo Completed 2496 km
2026-09-15 02:24 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N17460 Boeing 737 MAX 9 Completed 1075 km
2026-09-14 21:36 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N44501 Airbus A321 Neo Completed 2518 km
2026-09-14 03:09 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N39415 Boeing 737-900 Completed 1060 km
2026-09-13 21:35 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N64572 Airbus A321 Neo Completed 2649 km
2026-09-13 02:53 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N36476 Boeing 737-900 Completed 1047 km
2026-09-12 21:50 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14515 Airbus A321 Neo Completed 2597 km
2026-09-12 02:22 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N75435 Boeing 737-900 Completed 1092 km
2026-09-11 21:47 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14565 Airbus A321 Neo Completed 2605 km
2026-09-11 02:29 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N37468 Boeing 737-900 Completed 1093 km
2026-09-10 21:35 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14576 Airbus A321 Neo Completed 2591 km
2026-09-10 02:23 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N37474 Boeing 737-900 Completed 1152 km
2026-09-09 21:49 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14567 Airbus A321 Neo Completed 2662 km
2026-09-08 02:21 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N17373 Boeing 737 MAX 8 Completed 1080 km
2026-09-07 21:40 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14521 Airbus A321 Neo Completed 2529 km
2026-09-07 02:50 UTC UAL421 IAD → ORD
Washington, DC → Chicago
 N47281 Boeing 737 MAX 8 Completed 1094 km
2026-09-06 21:31 UTC UAL421 DEN → IAD
Denver → Washington, DC
 N14506 Airbus A321 Neo Completed 2506 km

← Back to the live map