AirHint found the following cheapest one-way flights from Seoul (GMP) to Cheju (CJU) in April 2026 (see full year).

One-Way flights

20 Apr	Asiana Airlines	direct
07 Apr	Asiana Airlines	direct
15 Apr	Asiana Airlines	direct
27 Apr	Asiana Airlines	direct
01 Apr	Asiana Airlines	direct
06 Apr	Asiana Airlines	direct
29 Apr	Asiana Airlines	direct
19 Apr	Asiana Airlines	direct
12 Apr	Asiana Airlines	direct
05 Apr	Asiana Airlines	direct

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

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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Cheapest one-way flights from Seoul to Cheju in April from $31

One-Way flights