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
21:12 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
13 ft
Coordinates
40.6394, -73.7793

cloud Weather

Wind
190° / 11 kt
Visibility
10 SM
Ceiling
FEW 7,000 ft, SCT 11,000 ft, BKN 15,000 ft
Temp / Dew
17°C / 13°C
Altimeter
29.73 inHg

Obs: 2026-05-30T00:51:00.000Z

Raw METAR / TAF 
METAR KJFK 300051Z 19011KT 10SM FEW070 SCT110 BKN150 17/13 A2973 RMK AO2 SLP067 T01720128 $

TAF KJFK 292337Z 3000/3106 19015G27KT P6SM SCT070 BKN100 TEMPO 3000/3002 -SHRA FM300200 24012G21KT P6SM BKN070 BKN100 FM300400 27015G23KT P6SM BKN070 BKN100 FM300500 31017G25KT P6SM SCT070 BKN100 FM301100 34022G32KT P6SM BKN040 BKN100 FM302200 36017G26KT P6SM SCT040 BKN100 FM310200 03007KT P6SM FEW040 FEW100

flight Live Traffic

flight_takeoff 228 Departures
flight_land 236 Arrivals

Arrival

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
18:12 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 14G20 kt
Visibility
10 SM
Ceiling
FEW 400 ft, BKN 1,800 ft, BKN 3,700 ft
Temp / Dew
16°C / 11°C
Altimeter
30.08 inHg

Obs: 2026-05-30T00:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300056Z 27014G20KT 10SM FEW004 BKN018 BKN037 16/11 A3008 RMK AO2 SLP186 T01560111

TAF KSFO 292320Z 3000/3106 27012KT P6SM BKN025 FM300400 26010KT P6SM OVC010 FM300900 26005KT P6SM BKN015 FM301700 29010KT P6SM SKC FM302000 28018KT P6SM SKC

warning FAA Advisories

  • Ground Delay: low ceilings (avg 1 hour and 5 minutes)

flight Live Traffic

flight_takeoff 264 Departures
flight_land 282 Arrivals

Recent history last 14

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A5CC11 JFK → SFO May 29, 14:10 UTCMay 29, 16:25 UTC2h 15m - -
2026-05-29 A5CC11 JFK → SFO May 29, 08:56 UTCMay 29, 16:20 UTC7h 24m +16m -10m
2026-05-29 A5CC11 JFK → SFO May 29, 08:55 UTCMay 29, 09:05 UTC10m - -
2026-05-27 A441AB JFK → SFO May 27, 13:40 UTCMay 27, 16:05 UTC2h 25m - -
2026-05-27 A441AB JFK → SFO May 27, 08:56 UTCMay 27, 16:03 UTC7h 7m +16m -8m
2026-05-27 A441AB JFK → SFO May 27, 08:50 UTCMay 27, 09:00 UTC10m - -
2026-05-24 A5CC11 JFK → SFO May 24, 09:35 UTCMay 24, 09:40 UTC5m - -
2026-05-24 A5CC11 JFK → SFO May 24, 09:26 UTCMay 24, 16:36 UTC7h 10m +46m -3m
2026-05-22 A2B153 JFK → SFO May 22, 08:56 UTCMay 22, 15:50 UTC6h 54m +16m -7m
2026-05-22 A2B153 JFK → SFO May 22, 08:45 UTCMay 22, 09:10 UTC25m - -
2026-05-20 A12429 JFK → SFO May 20, 10:15 UTCMay 20, 16:05 UTC5h 50m - -
2026-05-20 A12429 JFK → SFO May 20, 09:06 UTCMay 20, 16:12 UTC7h 6m +26m +14m
2026-05-20 A12429 JFK → SFO May 20, 09:00 UTCMay 20, 09:15 UTC15m - -
2026-05-17 A441AC JFK → SFO May 17, 09:00 UTCMay 17, 16:01 UTC7h 0m - -

Performance history

Flights tracked
14
Avg arrival delay
-3m
On-time arrival
100% 100% on time
Aircraft used
5

Monthly activity 1 month

Month Flights tracked
May 2026 14

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 3h 53m 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 14 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 5 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.