Cheapest return flights from Seoul to Cheju in September from $41

AirHint found the following cheapest return flights from Seoul (GMP) to Cheju (CJU) in September 2025 (see full year).

Return flights

10 Sep - 24 Sep T'way Air direct
09 Sep - 24 Sep Jeju Air direct
03 Sep - 24 Sep Jin Air direct
16 Sep - 24 Sep Jeju Air direct
23 Sep - 24 Sep Jeju Air direct
08 Sep - 24 Sep Jin Air direct
15 Sep - 24 Sep Jeju Air direct
17 Sep - 24 Sep Jin Air direct
22 Sep - 24 Sep Jin Air direct
02 Sep - 10 Sep Jeju Air direct
10 Sep - 01 Oct T'way Air direct
16 Sep - 01 Oct Jeju Air direct
23 Sep - 01 Oct Jeju Air direct
15 Sep - 01 Oct Jeju Air direct
29 Sep - 01 Oct Jin Air direct
17 Sep - 01 Oct Jin Air direct
24 Sep - 01 Oct Jin Air direct
22 Sep - 01 Oct Jin Air direct
30 Sep - 01 Oct Jeju Air direct
28 Sep - 01 Oct Jin Air direct

Also check the deals for one-way flights from Seoul to Cheju in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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