Air SeoulRS
Flights RS9285 varies Mo Sa
live
Direct flights from Jeju City (CJU) to Kumamoto (KMJ): 2 nonstop departures observed each week across 1 airline. No cancellations were recorded across the 2 tracked flights. The nonstop covers 413 km, an estimated 1 hour 2 minutes in the air. Measured by Pro Flight Search from live flight boards at Jeju City and Kumamoto. Updated 2 November 2026 at 14:23 UTC.
CJU
Jeju City
busy · +22
KMJ
Kumamoto
smooth · +0
413 km · ~1h 02m est.
Running clean · 1 airline · 2x weekly · nonstop
85 / 100
route health from live CJU and KMJ delay boards
0 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Flight time~1h 02mestimated from route distance
Weekly departures2x1 direct airline on the leg
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the Jeju City to Kumamoto route actually runs
Pro Flight Search records official board updates for nonstop CJU to KMJ flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
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Suggested citation
Pro Flight Search: Jeju City (CJU) to Kumamoto (KMJ) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/CJU-KMJ
CJU to KMJ questions
Is CJU–KMJ running on time right now?
Smooth skies ahead. The departure side at CJU is the weaker end, route health score 85/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from CJU to KMJ?
Great-circle distance is 413 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 59–65 min gate-to-gate on this route.
How often does CJU–KMJ fly?
Air Seoul runs the route with about 2 flights a week (mon, sat). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at CJU and arrival-side delay at KMJ, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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