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
20:44 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
36 ft
Coordinates
39.8719, -75.2411

cloud Weather

Wind
180° / 5 kt
Visibility
10 SM
Ceiling
FEW 4,500 ft, FEW 9,000 ft, BKN 26,000 ft
Temp / Dew
27°C / 22°C
Altimeter
30.02 inHg

Obs: 2026-08-28T23:54:00.000Z

Raw METAR / TAF 
METAR KPHL 282354Z 18005KT 10SM FEW045 FEW090 BKN260 27/22 A3002 RMK AO2 SLP166 T02670222 10306 20267 53007 $

TAF KPHL 282320Z 2900/3006 01004KT P6SM FEW250 FM291300 04007KT P6SM FEW250

flight Live Traffic

flight_takeoff 159 Departures
flight_land 111 Arrivals

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
17:44 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
260° / 19 kt
Visibility
10 SM
Ceiling
FEW 400 ft, SCT 1,200 ft, BKN 18,000 ft, BKN 20,000 ft
Temp / Dew
17°C / 13°C
Altimeter
29.99 inHg

Obs: 2026-08-28T23:56:00.000Z

Raw METAR / TAF 
METAR KSFO 282356Z 26019KT 10SM FEW004 SCT012 BKN180 BKN200 17/13 A2999 RMK AO2 PK WND 26026/2316 SLP155 T01720128 10183 20161 56014 $

TAF KSFO 282335Z 2900/3006 28016KT P6SM VCSH FEW012 BKN150 FM290300 28014KT P6SM FEW012 TEMPO 2904/2908 BKN012 FM290800 29008KT P6SM OVC012 FM291800 29015G25KT P6SM FEW015 FM300400 27015KT P6SM SCT010

flight Live Traffic

flight_takeoff 180 Departures
flight_land 164 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A1235B PHL → SFO Jul 26, 17:10 UTCJul 26, 17:55 UTC45m - -
2026-07-26 AA56F7 PHL → SFO Jul 26, 12:40 UTCJul 26, 14:25 UTC1h 45m - -
2026-07-25 AA4C1A PHL → SFO Jul 25, 12:55 UTCJul 25, 14:35 UTC1h 40m - -
2026-07-24 A12AE3 PHL → SFO Jul 24, 17:25 UTCJul 24, 18:15 UTC50m - -
2026-07-24 AA56DB PHL → SFO Jul 24, 12:45 UTCJul 24, 14:35 UTC1h 50m - -
2026-07-23 A9D5E4 PHL → SFO Jul 23, 17:25 UTCJul 23, 18:05 UTC40m - -
2026-07-23 A23A02 PHL → SFO Jul 23, 12:50 UTCJul 23, 14:30 UTC1h 40m - -
2026-07-22 AA7E2E PHL → SFO Jul 22, 17:20 UTCJul 22, 18:05 UTC45m - -
2026-07-22 AAA58B PHL → SFO Jul 22, 12:40 UTCJul 22, 14:30 UTC1h 50m - -
2026-07-21 A1240A PHL → SFO Jul 21, 17:05 UTCJul 21, 17:50 UTC45m - -
2026-07-21 A465DF PHL → SFO Jul 21, 13:00 UTCJul 21, 14:45 UTC1h 45m - -
2026-07-21 A465DF PHL → SFO Jul 21, 12:48 UTCJul 21, 14:44 UTC1h 56m +33m -2m
2026-07-20 A3A0ED PHL → SFO Jul 20, 17:10 UTCJul 20, 17:55 UTC45m - -
2026-07-20 A3A0ED PHL → SFO Jul 20, 17:13 UTCJul 20, 17:48 UTC35m +14m -5m
2026-07-20 A0ACF9 PHL → SFO Jul 20, 12:45 UTCJul 20, 14:30 UTC1h 45m - -
2026-07-19 AA5691 PHL → SFO Jul 19, 17:35 UTCJul 19, 18:20 UTC45m - -
2026-07-19 AC0BC4 PHL → SFO Jul 19, 13:00 UTCJul 19, 14:45 UTC1h 45m - -
2026-07-18 A43EA3 PHL → SFO Jul 18, 14:25 UTCJul 18, 16:10 UTC1h 45m - -
2026-07-17 AC0B7F - Jul 17, 17:09 UTCJul 17, 17:55 UTC45m - -
2026-07-17 AC0B7F DFW → IAH Jul 17, 17:13 UTCJul 17, 17:50 UTC37m +14m -3m
2026-07-17 A0ACFD ORD → DFW Jul 17, 12:55 UTCJul 17, 14:44 UTC1h 50m - -
2026-07-17 A0ACFD ORD → DFW Jul 17, 12:48 UTCJul 17, 14:40 UTC1h 52m +33m -2m
2026-07-16 A03618 - Jul 16, 17:10 UTCJul 16, 17:49 UTC40m - -
2026-07-16 A03618 DFW → IAH Jul 16, 17:13 UTCJul 16, 17:48 UTC35m +14m -10m
2026-07-16 A3C775 ORD → DFW Jul 16, 12:48 UTCJul 16, 14:45 UTC1h 57m +33m +2m
2026-07-16 A3C775 ORD → DFW Jul 16, 13:00 UTCJul 16, 14:50 UTC1h 50m - -
2026-07-15 AA568E - Jul 15, 14:35 UTCJul 15, 16:20 UTC1h 45m - -
2026-07-14 A81005 - Jul 14, 17:15 UTCJul 14, 18:20 UTC1h 5m - -
2026-07-14 A05DBA ORD → DFW Jul 14, 12:55 UTCJul 14, 14:40 UTC1h 45m - -
2026-07-13 A2B0CD - Jul 13, 22:10 UTCJul 13, 23:05 UTC55m - -

Performance history

Flights tracked
262 showing last 30
Avg arrival delay
-3m
On-time arrival
100% 100% on time
Aircraft used
24

Monthly activity 4 months

Month Flights tracked
July 2026 63
June 2026 66
May 2026 64
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 18m 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 262 flights under this callsign.
Is flight UAL539 usually on time?
Across recent flights, UAL539 arrives 3 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL539?
UAL539 has been operated by 24 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.