Apparatus

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flight_takeoff Flight

UAL423

Operated by UAL

Live map

Live map filtered to UAL423. Shown when the flight is currently airborne.

Route airports View route page →

Departure

ATH LGAV VFR

Athens Eleftherios Venizelos International Airport

Spata-Artemida, GR

Local time
13:53 GMT+3
Timezone
Europe/Athens
Type
Large Airport
Elevation
308 ft
Coordinates
37.9364, 23.9445

cloud Weather

Wind
120° / 9 kt
Visibility
6 SM
Ceiling
FEW 2,500 ft
Temp / Dew
26°C / 6°C
Altimeter
30.06 inHg

Obs: 2026-05-30T10:20:00.000Z

Raw METAR / TAF 
METAR LGAV 301020Z 12009KT 9999 FEW025 26/06 Q1018 NOSIG

TAF LGAV 300500Z 3006/3106 03008KT 9999 FEW025 BECMG 3010/3012 12008KT BECMG 3014/3016 20008KT BECMG 3021/3023 27008KT

flight Live Traffic

flight_takeoff 17 Departures
flight_land 17 Arrivals

Arrival

ORD KORD VFR

Chicago O'Hare International Airport

Chicago, US

Local time
05:53 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
680 ft
Coordinates
41.9786, -87.9048

cloud Weather

Wind
20° / 6 kt
Visibility
10 SM
Ceiling
BKN 25,000 ft
Temp / Dew
14°C / 11°C
Altimeter
30.01 inHg

Obs: 2026-05-30T09:51:00.000Z

Raw METAR / TAF 
METAR KORD 300951Z 02006KT 10SM BKN250 14/11 A3001 RMK AO2 SLP160 T01390106 $

TAF KORD 300905Z 3009/3112 07007KT P6SM BKN250 FM301500 08014KT P6SM BKN250 FM310600 13008KT P6SM BKN250

flight Live Traffic

flight_takeoff 453 Departures
flight_land 625 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A0F427 YYZ → DEN May 29, 10:00 UTCMay 29, 20:25 UTC10h 25m - -
2026-05-28 A07DC8 YYZ → DEN May 28, 10:10 UTCMay 28, 20:33 UTC10h 23m +35m +11m
2026-05-28 A07DC8 YYZ → DEN May 28, 10:05 UTCMay 28, 12:00 UTC1h 55m - -
2026-05-27 A05626 YYZ → DEN May 27, 09:50 UTCMay 27, 20:15 UTC10h 25m - -
2026-05-26 A0566A YYZ → DEN May 26, 20:50 UTCMay 26, 21:00 UTC10m - -
2026-05-26 A0566A YYZ → DEN May 26, 10:25 UTCMay 26, 20:33 UTC10h 8m +50m -10m
2026-05-26 A0566A YYZ → DEN May 26, 10:34 UTCMay 26, 18:30 UTC7h 55m - -
2026-05-25 A07DCD YYZ → DEN May 25, 10:20 UTCMay 25, 20:55 UTC10h 34m - -
2026-05-24 A0A522 YYZ → DEN May 24, 09:55 UTCMay 24, 20:13 UTC10h 18m +20m -33m
2026-05-24 A0A522 YYZ → DEN May 24, 09:55 UTCMay 24, 20:47 UTC10h 52m +20m +1m
2026-05-24 A0A522 YYZ → DEN May 24, 09:55 UTCMay 24, 13:45 UTC3h 50m - -
2026-05-23 A05669 YYZ → DEN May 23, 10:25 UTCMay 23, 21:20 UTC10h 56m - -
2026-05-22 A07DC9 YYZ → DEN May 22, 09:50 UTCMay 22, 20:20 UTC10h 30m - -
2026-05-21 A05629 YYZ → DEN May 21, 09:50 UTCMay 21, 20:50 UTC11h 0m - -
2026-05-20 A05646 YYZ → DEN May 20, 09:55 UTCMay 20, 20:19 UTC10h 24m +20m +2m
2026-05-20 A05646 YYZ → DEN May 20, 09:45 UTCMay 20, 20:35 UTC10h 50m - -
2026-05-19 A0A54D YYZ → DEN May 19, 11:45 UTCMay 19, 22:35 UTC10h 50m - -
2026-05-18 A11BA0 YYZ → DEN May 18, 10:30 UTCMay 18, 21:09 UTC10h 39m +20m +18m
2026-05-18 A11BA0 YYZ → DEN May 18, 10:30 UTCMay 18, 21:25 UTC10h 54m - -
2026-05-17 A0A522 YYZ → DEN May 17, 09:50 UTCMay 17, 20:45 UTC10h 55m - -
2026-05-16 A11BC8 YYZ → DEN May 16, 09:56 UTCMay 16, 20:35 UTC10h 40m - -
2026-05-15 A05669 YYZ → DEN May 15, 09:55 UTCMay 15, 20:40 UTC10h 45m +20m +7m
2026-05-15 A05669 YYZ → DEN May 15, 10:00 UTCMay 15, 12:15 UTC2h 15m - -
2026-05-14 A05628 YYZ → DEN May 14, 09:50 UTCMay 14, 20:25 UTC10h 35m - -
2026-05-12 A05626 YYZ → DEN May 12, 09:50 UTCMay 12, 21:20 UTC11h 30m - -
2026-05-11 A05646 YYZ → DEN May 11, 09:55 UTCMay 11, 20:43 UTC10h 48m +20m -3m
2026-05-11 A05646 YYZ → DEN May 11, 10:15 UTCMay 11, 20:55 UTC10h 41m - -
2026-05-10 A07DCD YYZ → DEN May 10, 09:55 UTCMay 10, 20:25 UTC10h 30m - -
2026-05-09 A07DC8 YYZ → DEN May 9, 09:55 UTCMay 9, 20:40 UTC10h 45m - -
2026-05-08 A0A522 YYZ → DEN May 8, 10:12 UTCMay 8, 20:51 UTC10h 39m +37m +12m

Performance history

Flights tracked
84 showing last 30
Avg arrival delay
+1m
On-time arrival
89% 89% on time
Aircraft used
14

Monthly activity 2 months

Month Flights tracked
May 2026 45
April 2026 39

UAL423 frequently asked

Where does flight UAL423 fly?
UAL423 (UAL) flies from ATH to ORD. View the full route page.
How long is flight UAL423?
Based on observed flights, UAL423 takes on average 9h 26m from takeoff to landing.
How often does UAL423 fly?
UAL423 has been observed flying several times a week in our tracking data. We've recorded 84 flights under this callsign.
Is flight UAL423 usually on time?
Across recent flights, UAL423 arrives with an average 1-minute delay. 89% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL423?
UAL423 has been operated by 14 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL423 live?
Yes. When UAL423 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.