YAFT.LIVE

UAL837

SFO → NRT · Boeing 777-300ER · United Airlines

For travellers

Departure · San Francisco (SFO)

Terminal ITM · Gate G10
Scheduled 03 Oct 11:55 · Departed 03 Oct 12:11 · +16 min
Board status: Departed
Airborne since 03 Oct 12:41 (ADS-B)

Arrival · Tokyo / Narita (NRT)

Terminal T1-South · Gate 31
Scheduled 15:00 · Estimated 14:57
Board status: ARRIVED
Landed 09:25 (estimated)

Board data from narita, sfo, updated 54 min ago; times local to each airport.

Flight

Status
Incomplete (signal lost)
Departure
San Francisco International Airport (SFO) — San Francisco, United States
Scheduled departure
2026-10-03 18:55 UTC
Departed
2026-10-03 19:41 UTC
Arrival
Narita International Airport (NRT) — Tokyo / Narita, Japan (scheduled)
Scheduled arrival
2026-10-04 06:00 UTC
Estimated arrival
2026-10-04 05:57 UTC
Also flies as
UA837
Codeshares
NH7013
Distance flown
4215 km
Straight-line distance
8228 km

Aircraft

Registration
N2645U
Type
Boeing 777-300ER
Seats
350 total (204 Economy, 62 Economy Plus, 24 Premium Plus, 60 Polaris)

Altitude & speed

Max altitude
32,025 ft
Max ground speed
506 kt
Tracked
4h 45m · 4,209 km
Altitude (ft, max 32,025)
017,29434,5870m1h 0m2h 0m3h 0m4h 0m
Ground speed (kt, max 506)
02735460m1h 0m2h 0m3h 0m4h 0m
Altitude (ft, max 32,025)
017,29434,5870m2h 0m4h 0m
Ground speed (kt, max 506)
02735460m2h 0m4h 0m

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

DepartedFlightRouteRegAircraftStatusDistance
2026-10-04 09:02 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17326 Boeing 737 MAX 8 In progress ~2428 km est.
2026-10-04 05:22 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2645U Boeing 777-300ER Completed 350 km
2026-10-03 19:41 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2645U Boeing 777-300ER Incomplete (signal lost) ~8497 km est. (4215 km recorded)
2026-10-03 09:03 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N37319 Boeing 737 MAX 8 Completed 2622 km
2026-10-03 05:10 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2333U Boeing 777-300ER Completed 431 km
2026-10-02 19:15 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2333U Boeing 777-300ER Incomplete (signal lost) ~8312 km est. (461 km recorded)
2026-10-02 09:15 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17303 Boeing 737 MAX 8 Completed 2626 km
2026-10-02 05:18 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2332U Boeing 777-300ER Completed 423 km
2026-10-01 19:27 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2332U Boeing 777-300ER Incomplete (signal lost) ~8316 km est. (354 km recorded)
2026-10-01 08:55 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N37319 Boeing 737 MAX 8 Completed 2593 km
2026-10-01 05:20 UTC UAL837 ? → ? N2341U Boeing 777-300ER Incomplete (signal lost) 406 km
2026-09-30 19:29 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2341U Boeing 777-300ER Incomplete (signal lost) ~8285 km est. (326 km recorded)
2026-09-30 09:13 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17322 Boeing 737 MAX 8 Completed 2597 km
2026-09-30 05:04 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2737U Boeing 777-300ER Completed 407 km
2026-09-29 19:19 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2737U Boeing 777-300ER Incomplete (signal lost) ~8306 km est. (350 km recorded)
2026-09-29 09:26 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N37319 Boeing 737 MAX 8 Completed 2685 km
2026-09-29 05:14 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2748U Boeing 777-300ER Completed 547 km
2026-09-28 19:51 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2748U Boeing 777-300ER Incomplete (signal lost) ~8318 km est. (385 km recorded)
2026-09-28 09:23 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17316 Boeing 737 MAX 8 Completed 2561 km
2026-09-28 05:48 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2138U Boeing 777-300ER Completed (landing presumed) 516 km
2026-09-27 19:19 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2138U Boeing 777-300ER Incomplete (signal lost) ~8319 km est. (320 km recorded)
2026-09-27 09:39 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17309 Boeing 737 MAX 8 Completed 2582 km
2026-09-27 05:51 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2136U Boeing 777-300ER Completed 339 km
2026-09-26 19:53 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2136U Boeing 777-300ER Incomplete (signal lost) ~8601 km est. (4384 km recorded)
2026-09-26 09:17 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17306 Boeing 737 MAX 8 Completed 2829 km
2026-09-26 05:20 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2250U Boeing 777-300ER Completed 381 km
2026-09-25 19:35 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2250U Boeing 777-300ER Incomplete (signal lost) ~8601 km est. (4387 km recorded)
2026-09-25 10:47 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17309 Boeing 737 MAX 8 Completed 2573 km
2026-09-25 07:34 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2331U Boeing 777-300ER Completed 504 km
2026-09-24 22:47 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2331U Boeing 777-300ER Incomplete (signal lost) ~8539 km est. (4306 km recorded)
2026-09-24 09:00 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N27304 Boeing 737 MAX 8 Completed 2564 km
2026-09-24 05:02 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2747U Boeing 777-300ER Completed 429 km
2026-09-23 19:22 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2747U Boeing 777-300ER Incomplete (signal lost) ~8312 km est. (321 km recorded)
2026-09-23 09:13 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17322 Boeing 737 MAX 8 Completed 2582 km
2026-09-23 06:00 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2333U Boeing 777-300ER Completed 520 km
2026-09-22 19:46 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2333U Boeing 777-300ER Incomplete (signal lost) ~8676 km est. (4426 km recorded)
2026-09-22 09:19 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N27304 Boeing 737 MAX 8 Completed 2561 km
2026-09-22 04:50 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2138U Boeing 777-300ER Completed 458 km
2026-09-21 19:41 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2138U Boeing 777-300ER Incomplete (signal lost) ~8302 km est. (331 km recorded)
2026-09-20 09:15 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17316 Boeing 737 MAX 8 Completed 2678 km
2026-09-20 05:16 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2737U Boeing 777-300ER Completed 487 km
2026-09-19 20:13 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2737U Boeing 777-300ER Incomplete (signal lost) ~8336 km est. (828 km recorded)
2026-09-19 09:12 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N37319 Boeing 737 MAX 8 Completed 2713 km
2026-09-19 04:36 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2250U Boeing 777-300ER Completed 479 km
2026-09-18 19:05 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2250U Boeing 777-300ER Incomplete (signal lost) ~8552 km est. (4240 km recorded)
2026-09-18 09:02 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17316 Boeing 737 MAX 8 Completed 2834 km
2026-09-18 05:28 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2352U Boeing 777-300ER Completed 388 km
2026-09-17 20:01 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2352U Boeing 777-300ER Incomplete (signal lost) ~8331 km est. (356 km recorded)
2026-09-17 09:14 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17309 Boeing 737 MAX 8 Completed 2639 km
2026-09-17 05:01 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2243U Boeing 777-300ER Completed 452 km

← Back to the live map