JL639 TokyoHND · 19:10 KumamotoKMJ · 20:55
JL639 by Japan Airlines flies from Tokyo (HND) to Kumamoto (KMJ) for the Fri, Sep 25 departure.
departs HND · on schedule
board checked 4m ago · checking again in 45s
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation1 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at HND and KMJ 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.
Other Tokyo to Kumamoto flights today
same route · Japan AirlinesIf JL639 is cancelled, these are the other Japan Airlines nonstop flights from Tokyo to Kumamoto on the same day, with scheduled departure times in HND local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How JL639 actually runs
Pro Flight Search has tracked every published board update for JL639 across the HND and KMJ boards: schedule changes, gate pushes and actual clocks. Usually departs ~14 min late. Based on 12 confirmed departures · 8/12 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how JL639 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: JA611J, JA655J, JA610J, JA657J.
Board clocks recorded as HND and KMJ published them.
Planning around JL639? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — JL639 Tokyo to Kumamoto on-time performance, measured from the HND and KMJ airport boards.
https://proflightsearch.com/flight/JL639
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