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Flights between Seoul (ICN) and Kumamoto (KMJ)

Incheon International Airport, South Korea ↔ Kumamoto Airport, Japan

A direct route between Seoul and Kumamoto appears in the OpenFlights route network.

This reflects historical scheduled service and may be out of date — it is not a live timetable.

Airlines that have operated this route include:

Asiana Airlines (OZ)
Distance
652 km
405 miles
Est. flight time
1h 19m
great-circle estimate
Time difference
None
varies with DST
View this route on the live map →Search fares on Skyscanner ↗

Climate

Typical monthly temperatures in South Korea

Jan
3°
8/-2
20mm
Feb
6°
11/1
25mm
Mar
11°
16/6
50mm
Apr
18°
23/13
70mm
May
23°
28/18
100mm
Jun
27°
32/22
130mm
Jul
29°
34/24
350mm
Aug
30°
35/25
290mm
Sep
26°
31/21
170mm
Oct
20°
25/15
50mm
Nov
12°
17/7
50mm
Dec
5°
10/0
25mm

Mean °C (high/low below), avg. rainfall mm · country-level monthly normals, not airport-specific.

Typical monthly temperatures in Japan

Jan
10°
15/5
50mm
Feb
10°
15/5
60mm
Mar
13°
18/8
110mm
Apr
18°
23/13
130mm
May
23°
28/18
130mm
Jun
26°
31/21
170mm
Jul
30°
35/25
150mm
Aug
31°
36/26
170mm
Sep
27°
32/22
220mm
Oct
22°
27/17
200mm
Nov
17°
22/12
95mm
Dec
12°
17/7
50mm

Mean °C (high/low below), avg. rainfall mm · country-level monthly normals, not airport-specific.

Travel advisories

South Korea: Normal precautions (UK FCDO) ↗Japan: Normal precautions (UK FCDO) ↗

Common questions

How far is Seoul from Kumamoto?

Seoul (ICN) and Kumamoto (KMJ) are around 652 km (405 miles) apart — an estimated 1h 19m by air. Distances and flight times are great-circle estimates.

Which airlines have operated the ICN–KMJ route?

Airlines recorded operating this route in the OpenFlights network include Asiana Airlines. This reflects historical scheduled service and may be out of date.

What is the time difference between Seoul and Kumamoto?

Both airports keep the same time — no time difference.

When is it warmest in Japan?

Across Japan, the warmest month on average is August, with mean temperatures around 31°C. These are country-level monthly climate normals, not airport-specific.

Are there travel advisories for South Korea and Japan?

The UK FCDO currently rates South Korea as Normal precautions; The UK FCDO rates Japan as Normal precautions. Check the official sources before you travel.

Distances and flight times are great-circle estimates, not booked block times.