YAFT.LIVE

UAL837

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

For travellers

Arrival · Tokyo / Narita (NRT)

Terminal T1-South · Gate 33
Scheduled 29 Sep 15:00 · Estimated 29 Sep 15:06 · +6 min
Board status: ARRIVED
Landed 29 Sep 05:21 (estimated)

Board data from narita, updated 5598 min ago; times local to each airport.

Flight

Status
Incomplete (signal lost)
Departure
San Francisco International Airport (SFO) — San Francisco, United States
Departed
2026-09-28 19:51 UTC
Arrival
Narita International Airport (NRT) — Tokyo / Narita, Japan (scheduled)
Scheduled arrival
2026-09-29 06:00 UTC
Estimated arrival
2026-09-29 06:06 UTC
Also flies as
UA837
Codeshares
NH7013
Distance flown
385 km
Straight-line distance
8228 km

Aircraft

Registration
N2748U
Type
Boeing 777-300ER
Seats
350 total (204 Economy, 62 Economy Plus, 24 Premium Plus, 60 Polaris)

Altitude & speed

Max altitude
30,000 ft
Max ground speed
503 kt
Tracked
30m · 385 km
Altitude (ft, max 30,000)
016,20032,4000m
Ground speed (kt, max 503)
02725430m
Altitude (ft, max 30,000)
016,20032,4000m
Ground speed (kt, max 503)
02725430m

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
2026-10-03 09:03 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N37319 Boeing 737 MAX 8 In progress ~2428 km est.
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
2026-09-16 19:45 UTC UAL837 SFO → NRT
San Francisco → Tokyo / Narita
 N2243U Boeing 777-300ER Incomplete (signal lost) ~8327 km est. (324 km recorded)
2026-09-16 09:00 UTC UAL837 NRT → KHH
Tokyo / Narita → Kaohsiung City
 N17306 Boeing 737 MAX 8 Completed 2779 km
2026-09-16 05:10 UTC UAL837 ? → NRT
? → Tokyo / Narita
 N2135U Boeing 777-300ER Completed 447 km

← Back to the live map