Apparatus

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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

SNA KSNA VFR

John Wayne Orange County International Airport

Santa Ana, US

Local time
21:31 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
56 ft
Coordinates
33.6751, -117.8693

cloud Weather

Wind
220° / 4 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
17°C / 12°C
Altimeter
30.04 inHg

Obs: 2026-04-15T03:53:00.000Z

Raw METAR / TAF 
METAR KSNA 150353Z 22004KT 10SM CLR 17/12 A3004 RMK AO2 SLP171 T01720122 $

TAF KSNA 142320Z 1500/1524 22009KT P6SM SKC FM150300 VRB04KT P6SM FEW020 FM151100 VRB03KT P6SM BKN018 FM151700 VRB03KT P6SM SCT018 FM151900 21010KT P6SM SCT250

warning FAA Advisories

  • Closed: !SNA 04/027 SNA AD AP CLSD DLY 0630-1315 2604140630-2604151315 (Apr 14 at 06:30 UTC. – Apr 15 at 13:15 UTC.)

flight Live Traffic

flight_takeoff 46 Departures
flight_land 50 Arrivals

Arrival

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
22:31 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
360° / 10 kt
Visibility
10 SM
Ceiling
FEW 14,000 ft, SCT 22,000 ft
Temp / Dew
6°C / -1°C
Altimeter
29.90 inHg

Obs: 2026-04-15T03:53:00.000Z

Raw METAR / TAF 
METAR KDEN 150353Z 36010KT 10SM FEW140 SCT220 06/M01 A2990 RMK AO2 SLP093 T00561006

TAF KDEN 150258Z 1503/1606 34011KT P6SM SCT100 FM150600 21007KT P6SM SCT200 FM151400 27007KT P6SM SCT200 FM152100 31008KT P6SM SCT200 FM160300 23007KT P6SM SCT200

flight Live Traffic

flight_takeoff 656 Departures
flight_land 576 Arrivals

Recent history last 3

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-04-13 AB3DC3 BDL → IAD Apr 13, 19:50 UTCApr 13, 20:05 UTC15m - -
2026-04-13 AB3DC3 BDL → IAD Apr 13, 18:23 UTCApr 13, 20:27 UTC2h 4m +13m +7m
2026-04-12 A55EF3 BDL → IAD Apr 12, 18:25 UTCApr 12, 20:10 UTC1h 45m - -

Performance history

Flights tracked
3
Avg arrival delay
+7m
On-time arrival
100% 100% on time
Aircraft used
2

Monthly activity 1 month

Month Flights tracked
April 2026 3

UAL421 frequently asked

Where does flight UAL421 fly?
UAL421 (UAL) flies from SNA to DEN. View the full route page.
How long is flight UAL421?
Based on observed flights, UAL421 takes on average 1h 21m from takeoff to landing.
How often does UAL421 fly?
UAL421 has been observed flying occasionally in our tracking data. We've recorded 3 flights under this callsign.
Is flight UAL421 usually on time?
Across recent flights, UAL421 arrives with an average 7-minute delay. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL421?
UAL421 has been operated by 2 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.