JL639 TokyoHND · 18:55 KumamotoKMJ · 20:45
JL639 by Japan Airlines flies from Tokyo (HND) to Kumamoto (KMJ) for the Thu, Oct 29 departure.
departs HND · on schedule
board checked 3m 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 operationmedian arrival +20 min · 0 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions 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.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastTokyo to Kumamoto with Japan Airlines · Fri 30 Oct, local date
- Chance a departure is cancelled
- 1.1%0.9× usual
- Chance a departure leaves 60+ min late
- 1.9%1.4× usual
Forecast weather: 87% chance of rain at Kumamoto
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 8 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
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 lands ~10 min late. Based on 13 confirmed landings · 7/13 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 operationBoard 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
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — JL639 Tokyo to Kumamoto on-time performance, measured from the HND and KMJ airport boards.
https://proflightsearch.com/flight/JL639
.