Need help booking?
Unpublished phone-only deals available
GMP to KMJ: distance & flight time
Seoul (Gimpo International Airport) → Kumamoto (Kumamoto Airport)
399 mi
642 km · 346 nm
1h 31m
estimated nonstop flight time
Same time
time difference · heading southeast
See live GMP→KMJ fares Phone-only fares on this route — call free
Flight time details
399 miles nonstop takes roughly 1h 31m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- GMP — Gimpo International Airport · Seoul, South Korea
- KMJ — Kumamoto Airport · Kumamoto, Japan
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near GMP
- ICN · Incheon International Airport20 mi away
- SSN · Seoul Air Base (K-16)19 mi away
- SWU · Suwon Airport25 mi away
- OSN · Osan Air Base35 mi away
Near KMJ
- HSG · Saga Airport39 mi away
- AXJ · Amakusa Airport47 mi away
- NGS · Nagasaki Airport55 mi away
- FUK · Fukuoka Airport57 mi away
Frequently asked questions
How far is GMP from KMJ?
The flight distance from Seoul (GMP) to Kumamoto (KMJ) is 399 miles (642 km, 346 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GMP to KMJ?
A nonstop flight takes about 1h 31m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the cheapest way to fly from GMP to KMJ?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GMP–KMJ that never appear on search engines, with no booking fees.