Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL523

Operated by United Airlines

Live map

Live map filtered to UAL523. Shown when the flight is currently airborne.

Route airports View route page →

Departure

JFK KJFK VFR

John F. Kennedy International Airport

New York, US

Local time
15:52 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
13 ft
Coordinates
40.6394, -73.7793

cloud Weather

Wind
300° / 5 kt
Visibility
10 SM
Ceiling
FEW 6,000 ft, SCT 25,000 ft
Temp / Dew
26°C / 9°C
Altimeter
30.21 inHg

Obs: 2026-08-29T18:51:00.000Z

Raw METAR / TAF 
METAR KJFK 291851Z 30005KT 10SM FEW060 SCT250 26/09 A3021 RMK AO2 SLP230 T02560094 $

TAF KJFK 291732Z 2918/3024 VRB05KT P6SM FEW050 SCT250 FM291900 20009KT P6SM FEW050 SCT250 FM300400 23006KT P6SM FEW150 SCT250 FM301400 20010KT P6SM SCT070 SCT150 BKN250 FM301900 19015KT P6SM BKN070 BKN150 BKN250 PROB30 3019/3024 6SM -SHRA BR

flight Live Traffic

flight_takeoff 198 Departures
flight_land 285 Arrivals

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
12:52 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
300° / 13 kt
Visibility
10 SM
Ceiling
FEW 800 ft
Temp / Dew
21°C / 12°C
Altimeter
30.01 inHg

Obs: 2026-08-29T18:56:00.000Z

Raw METAR / TAF 
METAR KSFO 291856Z 30013KT 10SM FEW008 21/12 A3001 RMK AO2 SLP161 T02110117 $

TAF KSFO 291738Z 2918/3024 30010KT P6SM FEW006 FM292000 29016KT P6SM FEW006 FM300000 28016G25KT P6SM SKC FM300600 28014KT P6SM SKC FM301200 27010KT P6SM BKN013 FM301800 27012KT P6SM SCT015

flight Live Traffic

flight_takeoff 259 Departures
flight_land 195 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A441AB JFK → SFO Jul 26, 10:55 UTCJul 26, 16:50 UTC5h 55m - -
2026-07-26 A441AB JFK → SFO Jul 26, 09:46 UTCJul 26, 16:45 UTC6h 59m +66m +9m
2026-07-26 A441AB JFK → SFO Jul 26, 09:40 UTCJul 26, 09:50 UTC10m - -
2026-07-24 A2B45B JFK → SFO Jul 24, 10:10 UTCJul 24, 15:55 UTC5h 45m - -
2026-07-24 A2B45B JFK → SFO Jul 24, 08:55 UTCJul 24, 09:05 UTC10m - -
2026-07-22 A2B17A EWR → EWR Jul 22, 00:30 UTCJul 22, 15:35 UTC15h 5m - -
2026-07-19 A126EA FNC → EWR Jul 19, 12:11 UTCJul 19, 18:57 UTC6h 46m +211m -6m
2026-07-19 A126EA - Jul 19, 12:05 UTCJul 19, 12:25 UTC20m - -
2026-07-17 A12709 FNC → EWR Jul 17, 08:54 UTCJul 17, 15:55 UTC7h 0m - -
2026-07-15 A126E6 FNC → EWR Jul 15, 09:05 UTCJul 15, 16:05 UTC7h 0m - -
2026-07-12 A2B136 - Jul 12, 09:00 UTCJul 12, 09:20 UTC20m - -
2026-07-12 A2B136 FNC → EWR Jul 12, 08:56 UTCJul 12, 16:01 UTC7h 5m +16m -5m
2026-07-12 A2B136 FNC → EWR Jul 12, 08:56 UTCJul 12, 16:00 UTC7h 4m +16m -6m
2026-07-10 A44187 FNC → EWR Jul 10, 10:16 UTCJul 10, 17:21 UTC7h 5m +96m +5m
2026-07-10 A44187 FNC → EWR Jul 10, 10:15 UTCJul 10, 17:30 UTC7h 15m - -
2026-07-08 A2B196 - Jul 8, 10:15 UTCJul 8, 16:10 UTC5h 55m - -
2026-07-08 A2B196 - Jul 8, 09:00 UTCJul 8, 09:05 UTC5m - -
2026-07-05 A7598C FNC → EWR Jul 5, 08:55 UTCJul 5, 15:45 UTC6h 50m - -
2026-07-03 A12429 - Jul 3, 14:35 UTCJul 3, 15:45 UTC1h 10m - -
2026-07-03 A12429 - Jul 3, 08:55 UTCJul 3, 09:05 UTC10m - -
2026-07-01 A43EA7 FNC → EWR Jul 1, 09:00 UTCJul 1, 15:35 UTC6h 35m - -
2026-06-28 A2B196 - Jun 28, 13:49 UTCJun 28, 16:05 UTC2h 15m - -
2026-06-28 A2B196 - Jun 28, 08:50 UTCJun 28, 09:10 UTC20m - -
2026-06-26 A44187 - Jun 26, 14:15 UTCJun 26, 16:39 UTC2h 25m - -
2026-06-26 A44187 FNC → EWR Jun 26, 08:56 UTCJun 26, 16:38 UTC7h 42m +16m on time
2026-06-26 A44187 - Jun 26, 09:00 UTCJun 26, 09:10 UTC10m - -
2026-06-24 A126C3 FNC → EWR Jun 24, 09:06 UTCJun 24, 16:01 UTC6h 55m +26m -7m
2026-06-24 A126C3 FNC → EWR Jun 24, 09:06 UTCJun 24, 16:01 UTC6h 55m +26m -7m
2026-06-24 A126C3 - Jun 24, 09:05 UTCJun 24, 09:24 UTC20m - -
2026-06-21 A75966 FNC → EWR Jun 21, 08:56 UTCJun 21, 15:52 UTC6h 56m +16m -7m

Performance history

Flights tracked
60 showing last 30
Avg arrival delay
-3m
On-time arrival
100% 100% on time
Aircraft used
14

Monthly activity 3 months

Month Flights tracked
July 2026 21
June 2026 24
May 2026 15

UAL523 frequently asked

Where does flight UAL523 fly?
UAL523 (United Airlines) flies from JFK to SFO. View the full route page.
How long is flight UAL523?
Based on observed flights, UAL523 takes on average 4h 37m from takeoff to landing.
How often does UAL523 fly?
UAL523 has been observed flying several times a week in our tracking data. We've recorded 60 flights under this callsign.
Is flight UAL523 usually on time?
Across recent flights, UAL523 arrives 3 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL523?
UAL523 has been operated by 14 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL523 live?
Yes. When UAL523 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.