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

One-Way flights

21 Apr	Asiana Airlines	direct
22 Apr	Asiana Airlines	direct
14 Apr	Asiana Airlines	direct
20 Apr	Asiana Airlines	direct
08 Apr	Asiana Airlines	direct
26 Apr	Asiana Airlines	direct
19 Apr	Asiana Airlines	direct
02 Apr	Asiana Airlines	direct
09 Apr	Asiana Airlines	direct
03 Apr	Korean Air	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 26€

One-Way flights