Apparatus

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flight_takeoff Flight

UAL853

Operated by United Airlines

Live map

Live map filtered to UAL853. Shown when the flight is currently airborne.

Route airports View route page →

Departure

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
14:14 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
280° / 17G26 kt
Visibility
10 SM
Ceiling
FEW 500 ft, SCT 1,000 ft, BKN 10,000 ft, BKN 20,000 ft
Temp / Dew
17°C / 13°C
Altimeter
30.03 inHg

Obs: 2026-08-28T20:56:00.000Z

Raw METAR / TAF 
METAR KSFO 282056Z 28017G26KT 10SM FEW005 SCT010 BKN100 BKN200 17/13 A3003 RMK AO2 PK WND 26026/2048 SLP169 T01720133 50005

TAF KSFO 282047Z 2821/2924 28016KT P6SM VCSH SCT010 BKN100 FM290600 28012KT P6SM FEW012 FM291000 29008KT P6SM SCT012 FM291800 29015KT P6SM FEW015

flight Live Traffic

flight_takeoff 181 Departures
flight_land 173 Arrivals

Arrival

TPE RCTP VFR

Taiwan Taoyuan International Airport

Taoyuan, TW

Local time
05:14 GMT+8
Timezone
Asia/Taipei
Type
Large Airport
Elevation
106 ft
Coordinates
25.0777, 121.2330

cloud Weather

Wind
40° / 5 kt
Visibility
6 SM
Ceiling
FEW 1,500 ft, BKN 3,500 ft, BKN 18,000 ft
Temp / Dew
28°C / 28°C
Altimeter
29.56 inHg

Obs: 2026-08-28T21:00:00.000Z

Raw METAR / TAF 
METAR RCTP 282100Z 04005KT 9999 FEW015 BKN035 BKN180 28/28 Q1001 NOSIG RMK A2957

TAF RCTP 281700Z 2818/2924 26005KT 9999 FEW015 BKN032 BECMG 2821/2823 33005KT TEMPO 2904/2908 30010KT 5000 SHRA FEW012 BKN020 BECMG 2908/2910 10005KT TEMPO 2919/2922 18005KT

flight Live Traffic

flight_takeoff 16 Departures
flight_land 6 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 AAA893 SFO → TPE Jul 26, 07:15 UTCJul 26, 19:40 UTC12h 25m - -
2026-07-25 AABD7F SFO → TPE Jul 25, 19:20 UTCJul 25, 19:35 UTC15m - -
2026-07-25 AABD7F SFO → TPE Jul 25, 07:35 UTCJul 25, 18:05 UTC10h 30m - -
2026-07-24 A75103 SFO → TPE Jul 24, 19:25 UTCJul 24, 19:50 UTC25m - -
2026-07-24 A75103 SFO → TPE Jul 24, 07:41 UTCJul 24, 19:40 UTC11h 59m +46m -11m
2026-07-24 A75103 SFO → TPE Jul 24, 07:45 UTCJul 24, 18:10 UTC10h 25m - -
2026-07-23 A1D546 SFO → TPE Jul 23, 19:20 UTCJul 23, 19:35 UTC15m - -
2026-07-23 A1D546 SFO → TPE Jul 23, 07:35 UTCJul 23, 18:00 UTC10h 25m - -
2026-07-22 AA4440 SFO → TPE Jul 22, 19:20 UTCJul 22, 19:35 UTC15m - -
2026-07-22 AA4440 SFO → TPE Jul 22, 16:30 UTCJul 22, 18:05 UTC1h 35m - -
2026-07-22 AA4440 SFO → TPE Jul 22, 07:26 UTCJul 22, 19:30 UTC12h 4m +31m -16m
2026-07-21 AAC4ED SFO → TPE Jul 21, 20:05 UTCJul 21, 20:20 UTC15m - -
2026-07-21 AAC4ED SFO → TPE Jul 21, 08:10 UTCJul 21, 18:45 UTC10h 35m - -
2026-07-20 AACC5B SFO → TPE Jul 20, 19:30 UTCJul 20, 19:55 UTC25m - -
2026-07-20 AACC5B SFO → TPE Jul 20, 07:45 UTCJul 20, 18:25 UTC10h 40m - -
2026-07-19 A1D8FD SFO → TPE Jul 19, 07:20 UTCJul 19, 19:30 UTC12h 10m - -
2026-07-18 AA92F8 SFO → TPE Jul 18, 07:26 UTCJul 18, 19:48 UTC12h 22m +31m +2m
2026-07-18 AA92F8 - Jul 18, 07:30 UTCJul 18, 08:00 UTC30m - -
2026-07-17 AAC4ED - Jul 17, 19:35 UTCJul 17, 20:00 UTC25m - -
2026-07-17 AAC4ED SFO → TPE Jul 17, 07:43 UTCJul 17, 19:57 UTC12h 14m +48m +10m
2026-07-17 AAC4ED - Jul 17, 07:55 UTCJul 17, 18:29 UTC10h 35m - -
2026-07-16 AA6B9F - Jul 16, 19:35 UTCJul 16, 19:50 UTC15m - -
2026-07-16 AA6B9F - Jul 16, 07:50 UTCJul 16, 18:25 UTC10h 35m - -
2026-07-14 A2007C - Jul 14, 19:40 UTCJul 14, 20:05 UTC25m - -
2026-07-14 A2007C SFO → TPE Jul 14, 07:39 UTCJul 14, 20:06 UTC12h 27m +44m -9m
2026-07-14 A2007C - Jul 14, 07:55 UTCJul 14, 18:35 UTC10h 40m - -
2026-07-13 AAB001 SFO → TPE Jul 13, 07:55 UTCJul 13, 20:00 UTC12h 5m - -
2026-07-12 A1B535 SFO → TPE Jul 12, 07:41 UTCJul 12, 19:43 UTC12h 2m +46m -4m
2026-07-12 A1B535 - Jul 12, 07:35 UTCJul 12, 08:01 UTC25m - -
2026-07-11 AABD7F SFO → TPE Jul 11, 10:10 UTCJul 11, 22:55 UTC12h 45m - -

Performance history

Flights tracked
196 showing last 30
Avg arrival delay
-5m
On-time arrival
100% 100% on time
Aircraft used
13

Monthly activity 4 months

Month Flights tracked
July 2026 48
June 2026 48
May 2026 53
April 2026 47

UAL853 frequently asked

Where does flight UAL853 fly?
UAL853 (United Airlines) flies from SFO to TPE. View the full route page.
How long is flight UAL853?
Based on observed flights, UAL853 takes on average 7h 5m from takeoff to landing.
How often does UAL853 fly?
UAL853 has been observed flying several times a week in our tracking data. We've recorded 196 flights under this callsign.
Is flight UAL853 usually on time?
Across recent flights, UAL853 arrives 5 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL853?
UAL853 has been operated by 13 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL853 live?
Yes. When UAL853 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.