Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL939

Operated by UAL

Live map

Live map filtered to UAL939. Shown when the flight is currently airborne.

Route airports View route page →

Departure

LHR EGLL VFR

London Heathrow Airport

London, GB

Local time
08:59 GMT+1
Timezone
Europe/London
Type
Large Airport
Elevation
83 ft
Coordinates
51.4707, -0.4599

cloud Weather

Wind
90° / 3 kt
Visibility
6 SM
Ceiling
CLR
Temp / Dew
21°C / 9°C
Altimeter
30.15 inHg

Obs: 2026-05-30T07:50:00.000Z

Raw METAR / TAF 
METAR EGLL 300750Z AUTO 09003KT 040V210 9999 NCD 21/09 Q1021

TAF EGLL 300456Z 3006/3112 VRB04KT CAVOK BECMG 3014/3017 28010KT BECMG 3104/3107 BKN030 PROB30 TEMPO 3105/3108 BKN014

flight Live Traffic

flight_takeoff 24 Departures
flight_land 35 Arrivals

Arrival

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
00:59 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 216 Departures
flight_land 156 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 AB0F89 LHR → SFO May 29, 15:50 UTCMay 30, 02:10 UTC10h 20m - -
2026-05-28 A6679B LHR → SFO May 28, 15:55 UTCMay 29, 01:45 UTC9h 50m - -
2026-05-27 A7F4E7 LHR → SFO May 27, 15:39 UTCMay 28, 01:47 UTC10h 8m +24m +7m
2026-05-26 A7F4E9 LHR → SFO May 26, 15:35 UTCMay 26, 16:15 UTC40m - -
2026-05-26 A7F4E9 LHR → SFO May 26, 15:39 UTCMay 27, 01:42 UTC10h 3m +24m -4m
2026-05-25 A1BFAC LHR → SFO May 25, 16:00 UTCMay 26, 02:35 UTC10h 34m - -
2026-05-24 A7F4E9 LHR → SFO May 24, 15:35 UTCMay 24, 23:46 UTC8h 11m - -
2026-05-24 A7F4E9 LHR → SFO May 24, 15:39 UTCMay 25, 01:55 UTC10h 16m +24m +10m
2026-05-23 AB0F89 LHR → SFO May 23, 15:45 UTCMay 24, 02:00 UTC10h 16m - -
2026-05-22 A1BFAC LHR → SFO May 22, 16:00 UTCMay 22, 23:00 UTC7h 0m - -
2026-05-22 A1BFAC LHR → SFO May 22, 15:39 UTCMay 23, 01:55 UTC10h 16m +24m +27m
2026-05-21 AAA893 LHR → SFO May 21, 15:45 UTCMay 22, 02:00 UTC10h 15m - -
2026-05-20 AAA125 LHR → SFO May 20, 15:40 UTCMay 21, 01:55 UTC10h 15m - -
2026-05-19 A20433 LHR → SFO May 19, 15:55 UTCMay 20, 02:00 UTC10h 5m - -
2026-05-18 A75103 LHR → SFO May 18, 15:30 UTCMay 19, 01:50 UTC10h 19m - -
2026-05-18 A75103 LHR → SFO May 18, 15:39 UTCMay 19, 01:40 UTC10h 1m +24m -2m
2026-05-17 AAA4DC LHR → SFO May 17, 15:45 UTCMay 18, 01:50 UTC10h 5m - -
2026-05-16 A1FCC5 LHR → SFO May 16, 15:55 UTCMay 17, 01:50 UTC9h 55m - -
2026-05-15 AADB37 LHR → SFO May 15, 15:25 UTCMay 16, 01:50 UTC10h 25m - -
2026-05-14 AAC136 LHR → SFO May 14, 15:55 UTCMay 15, 02:40 UTC10h 45m - -
2026-05-13 A1B535 LHR → SFO May 13, 17:35 UTCMay 14, 04:15 UTC10h 40m - -
2026-05-12 AAC4ED LHR → SFO May 12, 15:30 UTCMay 12, 18:00 UTC2h 30m - -
2026-05-12 AAC4ED LHR → SFO May 12, 15:39 UTCMay 13, 02:03 UTC10h 24m +24m +6m
2026-05-11 AAA893 LHR → SFO May 11, 15:55 UTCMay 11, 22:35 UTC6h 40m - -
2026-05-10 A1F557 LHR → SFO May 10, 15:45 UTCMay 11, 02:55 UTC11h 10m - -
2026-05-09 A20433 LHR → SFO May 9, 15:45 UTCMay 9, 16:45 UTC1h 0m - -
2026-05-09 A20433 LHR → SFO May 9, 15:39 UTCMay 10, 01:53 UTC10h 14m +24m -8m
2026-05-09 A20433 LHR → SFO May 9, 15:39 UTCMay 10, 02:01 UTC10h 22m +24m on time
2026-05-08 AAD3C9 LHR → SFO May 8, 15:50 UTCMay 9, 02:15 UTC10h 25m - -
2026-05-08 AAD3C9 LHR → SFO May 8, 15:39 UTCMay 9, 02:08 UTC10h 29m +24m on time

Performance history

Flights tracked
87 showing last 30
Avg arrival delay
+4m
On-time arrival
89% 89% on time
Aircraft used
17

Monthly activity 2 months

Month Flights tracked
May 2026 39
April 2026 48

UAL939 frequently asked

Where does flight UAL939 fly?
UAL939 (UAL) flies from LHR to SFO. View the full route page.
How long is flight UAL939?
Based on observed flights, UAL939 takes on average 9h 7m from takeoff to landing.
How often does UAL939 fly?
UAL939 has been observed flying several times a week in our tracking data. We've recorded 87 flights under this callsign.
Is flight UAL939 usually on time?
Across recent flights, UAL939 arrives with an average 4-minute delay. 89% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL939?
UAL939 has been operated by 17 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL939 live?
Yes. When UAL939 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.