Apparatus

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flight_takeoff Flight

UAL539

Operated by United Airlines

Live map

Live map filtered to UAL539. Shown when the flight is currently airborne.

Route airports View route page →

Departure

PHL KPHL VFR

Philadelphia International Airport

Philadelphia, US

Local time
03:30 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
36 ft
Coordinates
39.8719, -75.2411

cloud Weather

Wind
250° / 9 kt
Visibility
10 SM
Ceiling
SCT 10,000 ft
Temp / Dew
18°C / 12°C
Altimeter
29.73 inHg

Obs: 2026-05-30T06:54:00.000Z

Raw METAR / TAF 
METAR KPHL 300654Z 25009KT 10SM SCT100 18/12 A2973 RMK AO2 SLP067 T01830122 $

TAF KPHL 300520Z 3006/3112 27012KT P6SM BKN100 FM300900 32018G26KT P6SM SCT100 FM301500 35020G30KT P6SM SCT060 FM302100 01011KT P6SM FEW060 FM310400 VRB03KT P6SM SKC

flight Live Traffic

flight_takeoff 46 Departures
flight_land 57 Arrivals

Arrival

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
00:30 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 10 kt
Visibility
10 SM
Ceiling
OVC 1,000 ft
Temp / Dew
13°C / 11°C
Altimeter
30.11 inHg

Obs: 2026-05-30T06:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300656Z 27010KT 10SM OVC010 13/11 A3011 RMK AO2 SLP195 T01280106

TAF KSFO 300520Z 3006/3112 26009KT P6SM OVC008 FM301000 27006KT P6SM OVC012 FM301800 28012KT P6SM SKC FM302300 27022KT P6SM SKC FM310600 28012KT P6SM SKC

flight Live Traffic

flight_takeoff 235 Departures
flight_land 165 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 AA7E79 PHL → SFO May 29, 17:10 UTCMay 29, 17:50 UTC40m - -
2026-05-29 AC0B7F PHL → SFO May 29, 13:00 UTCMay 29, 14:55 UTC1h 55m - -
2026-05-28 AA56D5 PHL → SFO May 28, 17:15 UTCMay 28, 18:00 UTC45m - -
2026-05-28 A3C775 PHL → SFO May 28, 13:10 UTCMay 28, 15:05 UTC1h 55m - -
2026-05-27 AA5690 PHL → SFO May 27, 17:30 UTCMay 27, 18:20 UTC50m - -
2026-05-27 A23A02 PHL → SFO May 27, 12:50 UTCMay 27, 15:05 UTC2h 15m - -
2026-05-26 A12797 PHL → SFO May 26, 17:20 UTCMay 26, 17:59 UTC40m - -
2026-05-26 AA7E7A PHL → SFO May 26, 13:00 UTCMay 26, 14:50 UTC1h 50m - -
2026-05-25 A5D927 PHL → SFO May 25, 17:55 UTCMay 25, 18:40 UTC45m - -
2026-05-25 A416BE PHL → SFO May 25, 12:48 UTCMay 25, 14:38 UTC1h 50m +33m +8m
2026-05-25 A416BE PHL → SFO May 25, 12:45 UTCMay 25, 14:40 UTC1h 55m - -
2026-05-24 A0ACF9 PHL → SFO May 24, 13:45 UTCMay 24, 15:40 UTC1h 55m - -
2026-05-23 A3A0CA PHL → SFO May 23, 12:35 UTCMay 23, 15:05 UTC2h 30m - -
2026-05-22 AA739D PHL → SFO May 22, 17:55 UTCMay 22, 18:35 UTC40m - -
2026-05-22 A43E7F PHL → SFO May 22, 13:20 UTCMay 22, 15:15 UTC1h 55m - -
2026-05-22 A43E7F PHL → SFO May 22, 13:25 UTCMay 22, 15:10 UTC1h 45m +70m +13m
2026-05-21 AC15D1 PHL → SFO May 21, 17:15 UTCMay 21, 17:55 UTC40m - -
2026-05-21 AA7E56 PHL → SFO May 21, 12:45 UTCMay 21, 14:40 UTC1h 55m - -
2026-05-20 AAF9EA PHL → SFO May 20, 18:00 UTCMay 20, 18:40 UTC40m - -
2026-05-20 A4423B PHL → SFO May 20, 12:40 UTCMay 20, 15:00 UTC2h 20m - -
2026-05-19 AAF9EA PHL → SFO May 19, 17:00 UTCMay 19, 17:40 UTC40m - -
2026-05-19 AAF9EA PHL → SFO May 19, 17:09 UTCMay 19, 17:38 UTC29m +14m +12m
2026-05-19 A5CC12 PHL → SFO May 19, 12:40 UTCMay 19, 15:35 UTC2h 55m - -
2026-05-18 A46D26 PHL → SFO May 18, 17:35 UTCMay 18, 18:15 UTC40m - -
2026-05-18 A126E6 PHL → SFO May 18, 12:35 UTCMay 18, 14:40 UTC2h 5m - -
2026-05-17 ABB440 PHL → SFO May 17, 17:10 UTCMay 17, 17:55 UTC45m - -
2026-05-17 A5CF19 PHL → SFO May 17, 12:35 UTCMay 17, 14:35 UTC2h 0m - -
2026-05-16 AC64CF PHL → SFO May 16, 17:05 UTCMay 16, 17:45 UTC40m - -
2026-05-16 AC64CF PHL → SFO May 16, 17:09 UTCMay 16, 17:45 UTC36m +14m +12m
2026-05-15 A44560 PHL → SFO May 15, 17:15 UTCMay 15, 17:55 UTC40m - -

Performance history

Flights tracked
130 showing last 30
Avg arrival delay
+11m
On-time arrival
100% 100% on time
Aircraft used
25

Monthly activity 2 months

Month Flights tracked
May 2026 61
April 2026 69

UAL539 frequently asked

Where does flight UAL539 fly?
UAL539 (United Airlines) flies from PHL to SFO. View the full route page.
How long is flight UAL539?
Based on observed flights, UAL539 takes on average 1h 22m from takeoff to landing.
How often does UAL539 fly?
UAL539 has been observed flying several times a week in our tracking data. We've recorded 130 flights under this callsign.
Is flight UAL539 usually on time?
Across recent flights, UAL539 arrives with an average 11-minute delay. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL539?
UAL539 has been operated by 25 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL539 live?
Yes. When UAL539 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.