UA837 San FranciscoSFO · 12:25 TokyoNRT · 15:00
UA837 by United Airlines flies from San Francisco (SFO) to Tokyo (NRT) for the Tue, Aug 18 departure.
en route from SFO to NRT
board checked 5m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 13:10 · typical taxi-out at SFO ≈ 13 min. No receiver coverage over open ocean.
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at SFO and NRT are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How UA837 actually runs
Pro Flight Search has tracked every published board update for UA837 across the SFO and NRT boards: schedule changes, gate pushes and actual clocks. Usually lands ~27 min late. Based on 4 confirmed landings · 2/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA837 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N2142U, N2748U, N2644U.
Board clocks recorded as SFO and NRT published them.
Planning around UA837? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA837 San Francisco to Tokyo on-time performance, measured from the SFO and NRT airport boards.
https://proflightsearch.com/flight/UA837
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