Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL421

Operated by UAL

Live map

Live map filtered to UAL421. Shown when the flight is currently airborne.

Route airports View route page →

Departure

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
04:42 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
170° / 14 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
19°C / 9°C
Altimeter
30.22 inHg

Obs: 2026-07-14T09:53:00.000Z

Raw METAR / TAF 
METAR KDEN 140953Z 17014KT 10SM CLR 19/09 A3022 RMK AO2 SLP137 T01890094

TAF KDEN 140843Z 1409/1512 16014G24KT P6SM SKC FM141100 19011KT P6SM SKC FM141300 23006KT P6SM SKC FM141500 VRB06KT P6SM FEW110 FM141700 10011KT P6SM FEW110 FM142100 13014G22KT P6SM FEW110 FM150400 16014G22KT P6SM FEW110

flight Live Traffic

flight_takeoff 264 Departures
flight_land 270 Arrivals

Arrival

IAD KIAD VFR

Washington Dulles International Airport

Dulles, US

Local time
06:42 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
312 ft
Coordinates
38.9445, -77.4558

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
18°C / 18°C
Altimeter
30.17 inHg

Obs: 2026-07-14T09:52:00.000Z

Raw METAR / TAF 
METAR KIAD 140952Z 00000KT 10SM CLR 18/18 A3017 RMK AO2 SLP214 T01830178 $

TAF KIAD 140841Z 1409/1512 18005KT P6SM SKC FM141600 22006KT P6SM FEW050

flight Live Traffic

flight_takeoff 142 Departures
flight_land 214 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-13 A6ED61 DEN → IAD Jul 13, 22:25 UTCJul 14, 01:30 UTC3h 5m - -
2026-07-12 A0B802 DEN → IAD Jul 12, 21:55 UTCJul 13, 00:50 UTC2h 55m - -
2026-07-11 A0B86C DEN → IAD Jul 11, 22:15 UTCJul 12, 01:15 UTC3h 0m - -
2026-07-10 A56050 DEN → IAD Jul 10, 21:59 UTCJul 11, 00:46 UTC2h 47m +19m -8m
2026-07-10 A56050 DEN → IAD Jul 10, 22:00 UTCJul 11, 00:50 UTC2h 50m - -
2026-07-09 A0B7BA DEN → IAD Jul 9, 23:00 UTCJul 10, 02:15 UTC3h 15m - -
2026-07-08 A0B7FD DEN → IAD Jul 8, 23:25 UTCJul 9, 02:30 UTC3h 5m - -
2026-07-07 A0B88B DEN → IAD Jul 7, 22:20 UTCJul 8, 01:25 UTC3h 5m - -
2026-07-06 A24508 DEN → IAD Jul 6, 22:15 UTCJul 7, 01:15 UTC3h 0m - -
2026-07-05 A0B841 DEN → IAD Jul 5, 22:00 UTCJul 6, 01:00 UTC3h 0m - -
2026-07-04 A0B846 DEN → IAD Jul 4, 22:20 UTCJul 5, 01:20 UTC3h 0m - -
2026-07-03 A6ED3B DEN → IAD Jul 3, 23:35 UTCJul 4, 02:35 UTC3h 0m - -
2026-07-02 A2452A DEN → IAD Jul 2, 22:00 UTCJul 3, 01:05 UTC3h 5m - -
2026-07-01 A0B7D8 DEN → IAD Jul 1, 21:59 UTCJul 2, 00:46 UTC2h 47m +19m -17m
2026-07-01 A0B7D8 DEN → IAD Jul 1, 21:55 UTCJul 2, 00:50 UTC2h 55m - -
2026-06-30 A0B7B7 DEN → IAD Jun 30, 22:45 UTCJul 1, 01:35 UTC2h 50m - -
2026-06-29 A245B7 DEN → IAD Jun 29, 22:44 UTCJun 30, 01:30 UTC2h 46m - -
2026-06-28 A923A9 DEN → IAD Jun 28, 22:04 UTCJun 29, 01:00 UTC2h 55m - -
2026-06-27 A0B7D9 DEN → IAD Jun 27, 22:09 UTCJun 28, 00:59 UTC2h 50m - -
2026-06-26 A0B841 DEN → IAD Jun 26, 21:59 UTCJun 27, 00:50 UTC2h 50m - -
2026-06-25 A0B7B8 DEN → IAD Jun 25, 21:55 UTCJun 26, 00:35 UTC2h 40m - -
2026-06-24 A8FC09 DEN → IAD Jun 24, 22:04 UTCJun 25, 00:49 UTC2h 45m - -
2026-06-24 A8FC09 DEN → IAD Jun 24, 22:04 UTCJun 25, 00:55 UTC2h 51m +24m -5m
2026-06-23 A0B845 DEN → IAD Jun 23, 22:19 UTCJun 24, 01:09 UTC2h 50m - -
2026-06-22 A0B866 DEN → IAD Jun 22, 22:10 UTCJun 23, 00:54 UTC2h 45m - -
2026-06-21 A245B7 DEN → IAD Jun 21, 22:10 UTCJun 22, 01:05 UTC2h 55m - -
2026-06-20 A0B844 DEN → IAD Jun 20, 23:25 UTCJun 21, 02:15 UTC2h 50m - -
2026-06-19 A0B88D DEN → IAD Jun 19, 22:14 UTCJun 20, 00:54 UTC2h 40m - -
2026-06-18 A24508 DEN → IAD Jun 18, 22:15 UTCJun 19, 00:55 UTC2h 39m - -
2026-06-17 A6EDE5 DEN → IAD Jun 17, 22:20 UTCJun 18, 01:20 UTC3h 0m - -

Performance history

Flights tracked
112 showing last 30
Avg arrival delay
-10m
On-time arrival
100% 100% on time
Aircraft used
24

Monthly activity 4 months

Month Flights tracked
July 2026 15
June 2026 34
May 2026 37
April 2026 26

UAL421 frequently asked

Where does flight UAL421 fly?
UAL421 (UAL) flies from DEN to IAD. View the full route page.
How long is flight UAL421?
Based on observed flights, UAL421 takes on average 2h 54m from takeoff to landing.
How often does UAL421 fly?
UAL421 has been observed flying daily in our tracking data. We've recorded 112 flights under this callsign.
Is flight UAL421 usually on time?
Across recent flights, UAL421 arrives 10 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL421?
UAL421 has been operated by 24 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL421 live?
Yes. When UAL421 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.