UAL857

Flight

Status

Incomplete (signal lost)

Departure

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

Est. departure time

2026-08-26 20:36 UTC (approx.)

Arrival

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

Distance flown

9635 km

Aircraft

Registration

N2331U

Type

Boeing 777-300ER

Seats

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

Altitude & speed

Max altitude

38,025 ft

Max ground speed

492 kt

Tracked

10h 57m · 9,551 km

Altitude (ft, max 38,025)

Ground speed (kt, max 492)

Altitude (ft, max 38,025)

Ground speed (kt, max 492)

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
2026-10-01 20:42 UTC	UAL857	SFO → PVG San Francisco → Shanghai	N2142U	Boeing 777-300ER	In progress	~9877 km est.
2026-09-30 20:29 UTC	UAL857	SFO → PVG San Francisco → Shanghai	N2333U	Boeing 777-300ER	Incomplete (signal lost)	9435 km
2026-09-29 20:18 UTC	UAL857	SFO → PVG San Francisco → Shanghai	N2748U	Boeing 777-300ER	Incomplete (signal lost)	9429 km
2026-09-28 20:59 UTC	UAL857	SFO → ? San Francisco → ?	N2250U	Boeing 777-300ER	Incomplete (signal lost)	9581 km
2026-09-27 20:47 UTC	UAL857	SFO → ? San Francisco → ?	N2136U	Boeing 777-300ER	Incomplete (signal lost)	9574 km
2026-09-26 20:38 UTC	UAL857	SFO → ? San Francisco → ?	N2748U	Boeing 777-300ER	Incomplete (signal lost)	9773 km
2026-09-25 21:05 UTC	UAL857	SFO → ? San Francisco → ?	N2138U	Boeing 777-300ER	Incomplete (signal lost)	9571 km
2026-09-24 20:51 UTC	UAL857	SFO → ? San Francisco → ?	N2639U	Boeing 777-300ER	Incomplete (signal lost)	9663 km
2026-09-23 20:20 UTC	UAL857	SFO → ? San Francisco → ?	N2250U	Boeing 777-300ER	Incomplete (signal lost)	9564 km
2026-09-22 20:46 UTC	UAL857	SFO → ? San Francisco → ?	N2136U	Boeing 777-300ER	Incomplete (signal lost)	9716 km
2026-09-21 20:47 UTC	UAL857	SFO → ? San Francisco → ?	N2747U	Boeing 777-300ER	Incomplete (signal lost)	9579 km
2026-09-20 20:26 UTC	UAL857	SFO → ? San Francisco → ?	N2639U	Boeing 777-300ER	Incomplete (signal lost)	9557 km
2026-09-19 20:31 UTC	UAL857	SFO → ? San Francisco → ?	N2138U	Boeing 777-300ER	Incomplete (signal lost)	9654 km
2026-09-18 20:32 UTC	UAL857	SFO → ? San Francisco → ?	N2341U	Boeing 777-300ER	Incomplete (signal lost)	9693 km
2026-09-17 19:27 UTC	UAL857	SFO → ? San Francisco → ?	N2737U	Boeing 777-300ER	Incomplete (signal lost)	9611 km
2026-09-16 20:54 UTC	UAL857	SFO → ? San Francisco → ?	N2135U	Boeing 777-300ER	Incomplete (signal lost)	9593 km
2026-09-15 20:38 UTC	UAL857	SFO → ? San Francisco → ?	N2737U	Boeing 777-300ER	Incomplete (signal lost)	9693 km
2026-09-14 20:52 UTC	UAL857	SFO → ? San Francisco → ?	N2748U	Boeing 777-300ER	Incomplete (signal lost)	9640 km
2026-09-13 22:29 UTC	UAL857	SFO → ? San Francisco → ?	N2135U	Boeing 777-300ER	Incomplete (signal lost)	9722 km
2026-09-12 20:30 UTC	UAL857	SFO → ? San Francisco → ?	N2140U	Boeing 777-300ER	Incomplete (signal lost)	9669 km
2026-09-11 20:25 UTC	UAL857	SFO → ? San Francisco → ?	N2138U	Boeing 777-300ER	Incomplete (signal lost)	9581 km
2026-09-10 20:50 UTC	UAL857	SFO → ? San Francisco → ?	N2140U	Boeing 777-300ER	Incomplete (signal lost)	9576 km
2026-09-09 20:54 UTC	UAL857	SFO → ? San Francisco → ?	N2136U	Boeing 777-300ER	Incomplete (signal lost)	9620 km
2026-09-07 20:51 UTC	UAL857	SFO → ? San Francisco → ?	N2534U	Boeing 777-300ER	Incomplete (signal lost)	9648 km
2026-09-06 22:36 UTC	UAL857	SFO → ? San Francisco → ?	N2135U	Boeing 777-300ER	Incomplete (signal lost)	9639 km
2026-09-05 21:04 UTC	UAL857	SFO → ? San Francisco → ?	N2332U	Boeing 777-300ER	Incomplete (signal lost)	9586 km
2026-09-04 20:59 UTC	UAL857	SFO → ? San Francisco → ?	N2333U	Boeing 777-300ER	Incomplete (signal lost)	9646 km
2026-09-03 20:55 UTC	UAL857	SFO → ? San Francisco → ?	N2748U	Boeing 777-300ER	Incomplete (signal lost)	9652 km
2026-09-02 20:52 UTC	UAL857	SFO → ? San Francisco → ?	N2251U	Boeing 777-300ER	Incomplete (signal lost)	9687 km
2026-09-01 20:54 UTC	UAL857	SFO → ? San Francisco → ?	N2748U	Boeing 777-300ER	Incomplete (signal lost)	9570 km
2026-09-01 02:02 UTC	UAL857	SFO → ? San Francisco → ?	N2332U	Boeing 777-300ER	Incomplete (signal lost)	9611 km
2026-08-30 21:13 UTC	UAL857	SFO → ? San Francisco → ?	N2749U	Boeing 777-300ER	Incomplete (signal lost)	9624 km
2026-08-29 20:47 UTC	UAL857	SFO → ? San Francisco → ?	N2644U	Boeing 777-300ER	Incomplete (signal lost)	9517 km
2026-08-29 00:48 UTC	UAL857	SFO → ? San Francisco → ?	N2136U	Boeing 777-300ER	Incomplete (signal lost)	9624 km
2026-08-27 21:06 UTC	UAL857	SFO → ? San Francisco → ?	N2644U	Boeing 777-300ER	Incomplete (signal lost)	9625 km
2026-08-26 20:53 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2331U	Boeing 777-300ER	Incomplete (signal lost)	~19030 km est. (9635 km recorded)
2026-08-25 22:56 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2644U	Boeing 777-300ER	Incomplete (signal lost)	~19120 km est. (9668 km recorded)
2026-08-24 20:59 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2639U	Boeing 777-300ER	Incomplete (signal lost)	~18986 km est. (9592 km recorded)
2026-08-23 22:21 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2644U	Boeing 777-300ER	Incomplete (signal lost)	~19025 km est. (9633 km recorded)
2026-08-22 22:23 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2534U	Boeing 777-300ER	Completed	~19078 km est. (9633 km recorded)
2026-08-21 23:30 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2644U	Boeing 777-300ER	Completed	~19966 km est. (10573 km recorded)
2026-08-19 22:51 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2644U	Boeing 777-300ER	Completed	~19987 km est. (10641 km recorded)
2026-08-16 20:22 UTC	UAL857	SFO → ? San Francisco → ?	N2138U	Boeing 777-300ER	Completed	10535 km
2026-08-15 20:26 UTC	UAL857	SFO → ? San Francisco → ?	N2251U	Boeing 777-300ER	Incomplete (signal lost)	10960 km
2026-08-14 20:29 UTC	UAL857	SFO → ? San Francisco → ?	N2747U	Boeing 777-300ER	Completed	10755 km
2026-08-14 07:24 UTC	UAL857	MNL → ? Manila → ?	N2251U	Boeing 777-300ER	Incomplete (signal lost)	0 km
2026-08-12 21:00 UTC	UAL857	SFO → ? San Francisco → ?	N2333U	Boeing 777-300ER	Incomplete (signal lost)	9629 km
2026-08-11 20:37 UTC	UAL857	SFO → ? San Francisco → ?	N2534U	Boeing 777-300ER	Incomplete (signal lost)	10594 km
2026-08-10 21:34 UTC	UAL857	? → ?	N2748U	Boeing 777-300ER	Incomplete (signal lost)	9617 km
2026-08-10 21:19 UTC	UAL857	SFO → SFO San Francisco → San Francisco	N2748U	Boeing 777-300ER	Completed	~2 km est. (0 km recorded)