Cheapest one-way flights from Seoul to Cheju in September from $21

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

One-Way flights

10 Sep T'way Air direct
09 Sep Jeju Air direct
02 Sep Jeju Air direct
03 Sep Jin Air direct
08 Sep Jin Air direct
16 Sep Jeju Air direct
15 Sep Jeju Air direct
23 Sep Jeju Air direct
24 Sep T'way Air direct
29 Sep Jin Air direct

Also check the deals for return flights from Seoul to Cheju in September.

Skyscanner

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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