UAL878

For travellers

Departure · Hong Kong (HKG)

Terminal T1 · Gate 42

Scheduled 23 Sep 22:30 · Departed 23 Sep 22:31

Board status: Final Call

Airborne since 23 Sep 22:46 (ADS-B)

Board data from hongkong, updated 13212 min ago; times local to each airport.

Flight

Status

Completed

Arrival confirmed via

ADS-B (ground reading)

Departure

Hong Kong International Airport (HKG) — Hong Kong, Hong Kong

Scheduled departure

2026-09-23 14:30 UTC

Departed

2026-09-23 14:46 UTC

Arrival

San Francisco International Airport (SFO) — San Francisco, United States

Also flies as

UA878

Distance flown

11459 km

Straight-line distance

11128 km

Approach distance

100 km

Aircraft

Registration

N2138U

Type

Boeing 777-300ER

Seats

350 total (204 Economy, 62 Economy Plus, 24 Premium Plus, 60 Polaris)

CO2 (EMEP est., total)

797.3 t (5079 kg/pax Business, 2082 kg/pax Premium Economy, 1661 kg/pax Economy)

Altitude & speed

Max altitude

35,000 ft

Max ground speed

555 kt

Tracked

12h 10m · 11,451 km

Altitude (ft, max 35,000)

Ground speed (kt, max 555)

Altitude (ft, max 35,000)

Ground speed (kt, max 555)

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

Departed	Flight	Route	Reg	Aircraft	Status	Distance
2026-10-02 14:40 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2644U	Boeing 777-300ER	In progress	~11128 km est.
2026-10-02 02:26 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed	524 km
2026-10-01 14:44 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed (landing confirmed by airport data)	~11447 km est. (1704 km recorded)
2026-09-30 22:27 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2243U	Boeing 777-300ER	Completed	934 km
2026-09-30 14:40 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2243U	Boeing 777-300ER	Completed (landing confirmed by airport data)	~11379 km est. (3356 km recorded)
2026-09-30 01:18 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2332U	Boeing 777-300ER	Completed	890 km
2026-09-29 14:36 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2332U	Boeing 777-300ER	Completed (landing confirmed by airport data)	~11406 km est. (3479 km recorded)
2026-09-28 14:46 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed	11968 km
2026-09-27 14:40 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2639U	Boeing 777-300ER	Completed	11856 km
2026-09-26 14:47 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2749U	Boeing 777-300ER	Completed	11479 km
2026-09-25 14:51 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2333U	Boeing 777-300ER	Completed	11447 km
2026-09-24 14:48 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2748U	Boeing 777-300ER	Completed	11524 km
2026-09-23 14:46 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2138U	Boeing 777-300ER	Completed	11459 km
2026-09-22 14:53 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2341U	Boeing 777-300ER	Completed	11592 km
2026-09-21 14:40 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2250U	Boeing 777-300ER	Completed	11545 km
2026-09-20 14:48 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2243U	Boeing 777-300ER	Completed	11860 km
2026-09-19 14:52 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2748U	Boeing 777-300ER	Completed	11611 km
2026-09-18 14:44 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2644U	Boeing 777-300ER	Completed	11642 km
2026-09-17 14:41 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2333U	Boeing 777-300ER	Completed	11604 km
2026-09-16 14:36 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2250U	Boeing 777-300ER	Completed	11528 km
2026-09-15 14:33 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2333U	Boeing 777-300ER	Completed	11631 km
2026-09-14 14:55 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2136U	Boeing 777-300ER	Completed	11668 km
2026-09-13 14:54 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2250U	Boeing 777-300ER	Completed	11559 km
2026-09-12 14:38 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2341U	Boeing 777-300ER	Completed	11562 km
2026-09-11 14:43 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2135U	Boeing 777-300ER	Completed	11575 km
2026-09-10 14:41 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2737U	Boeing 777-300ER	Completed	11556 km
2026-09-09 14:38 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2138U	Boeing 777-300ER	Completed	11551 km
2026-09-08 14:24 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	—	—	From schedule	~11128 km est.
2026-09-07 14:47 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2333U	Boeing 777-300ER	Completed	11518 km
2026-09-06 14:39 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed	11636 km
2026-09-05 14:57 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2251U	Boeing 777-300ER	Completed	11590 km
2026-09-04 14:46 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2534U	Boeing 777-300ER	Completed	11657 km
2026-09-03 14:38 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2644U	Boeing 777-300ER	Completed	11698 km
2026-09-02 14:43 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2250U	Boeing 777-300ER	Completed	11583 km
2026-09-01 14:47 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed	11553 km
2026-08-31 14:47 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2846U	Boeing 777-300ER	Completed	11667 km
2026-08-30 15:05 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N225UA	Boeing 777-200ER	Completed	11616 km
2026-08-29 15:07 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2352U	Boeing 777-300ER	Completed	11596 km
2026-08-28 14:33 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed	11511 km
2026-08-26 15:05 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2251U	Boeing 777-300ER	Completed	11526 km
2026-08-25 14:54 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2645U	Boeing 777-300ER	Completed	11704 km
2026-08-24 18:43 UTC	UAL878	HKG → HNL Hong Kong → Honolulu	N2251U	Boeing 777-300ER	Completed	9415 km
2026-08-23 15:00 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2331U	Boeing 777-300ER	Completed	11503 km
2026-08-22 14:51 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2846U	Boeing 777-300ER	Completed	12541 km
2026-08-21 14:46 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2140U	Boeing 777-300ER	Completed	12255 km
2026-08-20 14:39 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2142U	Boeing 777-300ER	Completed	15061 km
2026-08-19 14:44 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2534U	Boeing 777-300ER	Completed	14498 km
2026-08-18 14:56 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2737U	Boeing 777-300ER	Completed	16942 km
2026-08-17 14:48 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2644U	Boeing 777-300ER	Completed	12672 km
2026-08-16 14:32 UTC	UAL878	HKG → SFO Hong Kong → San Francisco	N2250U	Boeing 777-300ER	Completed	12316 km