Informational Guide to San Francisco Airport (SFO) - NON OFFICIAL

UA877 United Airlines - Flight Status

Below, you can find details about United Airlines flight UA877, which currently operates between the airports of San Francisco - San Francisco International Airport (Airport Code SFO) and Hong Kong - Hong Kong International Airport (Airport Code HKG).
This flight data pertains specifically to the flight's details for Thursday, December 18, 2025.

UA877 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Flight Status

UA877 United Airlines to Hong Kong

En Route - Delayed
Delay: 22 minutes
Flight Status for Thursday December 18, 2025
This flight is also scheduled for Today (December 19, 2025). See it here
This flight is also scheduled for Tomorrow (December 20, 2025). See it here

Airline information

United Airlines
United Airlines
Equipment: Boeing 777-300ER

Departure

San Francisco (SFO)
December 18, 2025
San Francisco International Airport
Departed at:
11:24 pm
Terminal:
IN - International
Gate:
G10
Scheduled Departure Time: 11:15 pm

Arrival

Hong Kong (HKG)
December 20, 2025
Hong Kong International Airport
Estimated Arrival Time:
07:07 am
Terminal:
1
Gate:
-
Scheduled Arrival Time: 06:45 am
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.airport-sfo.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.

Additional Information

Which is the frequency of flight UA877?
The flight UA877 is scheduled to flight on daily basis.

Which is the distance of flight UA877?
The distance between the two airports is 6915 miles.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in San Francisco: 2025-12-19 14:28:59
Current Time in Hong Kong: 2025-12-20 06:28:59

Alternative Flights

The following airlines serves the same route between San Francisco and Hong Kong:

Cathay Pacific
- Flight Number: CX873.
- Flight Number: CX879. (On Time performance: 85 - Average Delay: 6 minutes)
- Flight Number: CX893.

United Airlines
- Flight Number: UA869. (On Time performance: 75 - Average Delay: -31 minutes)

Punctuality and delays

It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from December 02, 2024 to November 30, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Note: We have excluded some months from the graph, since the quantity and quality of the data is not representative enough.

Last Past Flights UA877

Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
20 December
11:24 pm
San Francisco (SFO)
07:07 am
Hong Kong (HKG)
15h 43min
Boeing 777-300
Boeing 777-300
- Delayed
Friday
19 December
11:52 pm
San Francisco (SFO)
07:38 am
Hong Kong (HKG)
15h 46min
Boeing 777-300
Boeing 777-300
- Delayed
Thursday
18 December
11:12 pm
San Francisco (SFO)
07:09 am
Hong Kong (HKG)
15h 57min
Boeing 777-300
Boeing 777-300
- Delayed
Wednesday
17 December
11:44 pm
San Francisco (SFO)
07:13 am
Hong Kong (HKG)
15h 29min
Boeing 777-300
Boeing 777-300
- Delayed
Tuesday
16 December
12:21 am
San Francisco (SFO)
07:38 am
Hong Kong (HKG)
15h 17min
Boeing 777-300
Boeing 777-300
- Delayed
Monday
15 December
11:14 pm
San Francisco (SFO)
06:42 am
Hong Kong (HKG)
15h 28min
Boeing 777-300
Boeing 777-300
- On-time
Sunday
14 December
11:20 pm
San Francisco (SFO)
05:47 am
Hong Kong (HKG)
14h 27min
Boeing 777-300
Boeing 777-300
- On-time
Saturday
13 December
11:28 pm
San Francisco (SFO)
06:04 am
Hong Kong (HKG)
14h 36min
Boeing 777-300
Boeing 777-300
- On-time
Friday
12 December
11:15 pm
San Francisco (SFO)
06:45 am
Hong Kong (HKG)
15h 30min
Boeing 777-200
Boeing 777-200
Thursday
11 December
12:25 am
()
07:57 am
Hong Kong (HKG)
Boeing 777-300
Boeing 777-300
- DIVERTED