Apparatus

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flight_takeoff Flight

UAL878

Operated by United Airlines

Live map

Live map filtered to UAL878. Shown when the flight is currently airborne.

Route airports View route page →

Departure

HKG VHHH VFR

Hong Kong International Airport

Hong Kong, HK

Local time
16:24 GMT+8
Timezone
Asia/Hong_Kong
Type
Large Airport
Elevation
28 ft
Coordinates
22.3118, 113.9149

cloud Weather

Wind
280° / 7 kt
Visibility
6 SM
Ceiling
FEW 2,000 ft
Temp / Dew
32°C / 24°C
Altimeter
29.73 inHg

Obs: 2026-05-30T08:00:00.000Z

Raw METAR / TAF 
METAR VHHH 300800Z 28007KT 9999 FEW020 32/24 Q1007 NOSIG

TAF VHHH 300800Z 3009/3115 10010KT 9999 FEW015 TX32/3106Z TN28/3022Z TEMPO 3009/3011 27010KT TEMPO 3010/3014 4000 SHRA FEW010CB SCT020 TEMPO 3020/3024 VRB05KT 3500 SHRA FEW010CB SCT020 TEMPO 3103/3109 25010KT

flight Live Traffic

flight_takeoff 6 Departures
flight_land 13 Arrivals

Arrival

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
01:24 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
280° / 9 kt
Visibility
10 SM
Ceiling
OVC 1,000 ft
Temp / Dew
13°C / 11°C
Altimeter
30.11 inHg

Obs: 2026-05-30T07:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300756Z 28009KT 10SM OVC010 13/11 A3011 RMK AO2 SLP196 T01280106 401720122

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 294 Departures
flight_land 254 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A1F5FF HKG → SFO May 29, 14:55 UTCMay 29, 15:45 UTC50m - -
2026-05-29 A1F5FF HKG → SFO May 29, 14:51 UTCMay 30, 03:18 UTC12h 27m +21m +17m
2026-05-28 A28DC8 HKG → SFO May 28, 14:51 UTCMay 29, 02:47 UTC11h 56m +21m -19m
2026-05-28 A28DC8 HKG → SFO May 28, 14:45 UTCMay 28, 18:25 UTC3h 40m - -
2026-05-27 A21679 HKG → SFO May 27, 14:51 UTCMay 28, 03:17 UTC12h 26m +21m -13m
2026-05-27 A21679 HKG → SFO May 27, 14:50 UTCMay 28, 03:30 UTC12h 40m - -
2026-05-26 A1F622 HKG → SFO May 26, 14:51 UTCMay 27, 02:42 UTC11h 51m +21m -26m
2026-05-26 A1F622 HKG → SFO May 26, 14:40 UTCMay 27, 02:29 UTC11h 50m - -
2026-05-25 A21DC4 HKG → SFO May 25, 14:51 UTCMay 26, 03:15 UTC12h 24m +21m +4m
2026-05-25 A21DC4 HKG → SFO May 25, 14:50 UTCMay 26, 03:30 UTC12h 40m - -
2026-05-24 A1CB0F HKG → SFO May 24, 14:45 UTCMay 25, 02:35 UTC11h 50m - -
2026-05-24 A1CB0F HKG → SFO May 24, 14:51 UTCMay 25, 02:33 UTC11h 42m +21m +6m
2026-05-23 A290D0 HKG → SFO May 23, 18:05 UTCMay 24, 05:45 UTC11h 41m - -
2026-05-22 A2E014 HKG → SFO May 22, 20:05 UTCMay 23, 07:55 UTC11h 49m - -
2026-05-21 A21DC4 HKG → SFO May 21, 14:40 UTCMay 22, 02:35 UTC11h 55m - -
2026-05-20 A21679 HKG → SFO May 20, 14:51 UTCMay 21, 02:45 UTC11h 54m +21m +7m
2026-05-20 A21679 HKG → SFO May 20, 14:35 UTCMay 21, 02:15 UTC11h 40m - -
2026-05-19 A1C7E4 HKG → SFO May 19, 14:55 UTCMay 20, 02:40 UTC11h 45m - -
2026-05-18 A21656 HKG → SFO May 18, 14:50 UTCMay 19, 02:45 UTC11h 54m - -
2026-05-17 A2B501 HKG → SFO May 17, 14:50 UTCMay 18, 03:45 UTC12h 55m - -
2026-05-16 A2B8FE HKG → SFO May 16, 14:41 UTCMay 17, 03:00 UTC12h 20m - -
2026-05-15 A1F2B1 HKG → SFO May 15, 14:45 UTCMay 16, 02:40 UTC11h 54m - -
2026-05-14 A21633 HKG → SFO May 14, 14:51 UTCMay 15, 03:13 UTC12h 22m +21m -4m
2026-05-14 A21633 HKG → SFO May 14, 14:51 UTCMay 15, 03:16 UTC12h 25m +21m -1m
2026-05-14 A21633 HKG → SFO May 14, 14:45 UTCMay 14, 18:35 UTC3h 50m - -
2026-05-13 A1C82A HKG → SFO May 13, 14:45 UTCMay 14, 02:35 UTC11h 50m - -
2026-05-13 A1C82A HKG → SFO May 13, 14:51 UTCMay 14, 02:31 UTC11h 40m +21m -4m
2026-05-12 A21679 HKG → SFO May 12, 15:01 UTCMay 13, 02:55 UTC11h 55m - -
2026-05-11 A2B8FE HKG → SFO May 11, 14:51 UTCMay 12, 03:07 UTC12h 16m +21m -20m
2026-05-11 A2B8FE HKG → SFO May 11, 14:45 UTCMay 11, 17:30 UTC2h 46m - -

Performance history

Flights tracked
84 showing last 30
Avg arrival delay
-5m
On-time arrival
91% 91% on time
Aircraft used
15

Monthly activity 2 months

Month Flights tracked
May 2026 45
April 2026 39

UAL878 frequently asked

Where does flight UAL878 fly?
UAL878 (United Airlines) flies from HKG to SFO. View the full route page.
How long is flight UAL878?
Based on observed flights, UAL878 takes on average 10h 50m from takeoff to landing.
How often does UAL878 fly?
UAL878 has been observed flying several times a week in our tracking data. We've recorded 84 flights under this callsign.
Is flight UAL878 usually on time?
Across recent flights, UAL878 arrives 5 minutes early on average. 91% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL878?
UAL878 has been operated by 15 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL878 live?
Yes. When UAL878 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.