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Flights between Jeju City (CJU) and Seoul (ICN)

Jeju International Airport, South Korea ↔ Incheon International Airport, South Korea

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

Airlines currently operating this route:

Observed from recent schedules · as of 21 Jul 2026 — sampled, not a live timetable; confirm with the airline.

Jeju Air (7C)Jin Air (LJ)T'Way Air (TW)
Distance
440 km
273 miles
Est. flight time
1h 3m
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 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.

Common questions

How far is Jeju City from Seoul?

Jeju City (CJU) and Seoul (ICN) are around 440 km (273 miles) apart — an estimated 1h 3m by air. Distances and flight times are great-circle estimates.

Which airlines have operated the CJU–ICN route?

Airlines recorded operating this route in the OpenFlights network include Jeju Air, Jin Air, T'Way Air. This reflects historical scheduled service and may be out of date.

What is the time difference between Jeju City and Seoul?

Both airports keep the same time — no time difference.

When is it warmest in South Korea?

Across South Korea, the warmest month on average is August, with mean temperatures around 30°C. These are country-level monthly climate normals, not airport-specific.

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