AirHint found the following cheapest return flights from Seoul (ICN) to Cheju (CJU) in April 2026 (see full year).

Return flights

14 Apr - 16 Apr	China Southern
16 Apr - 18 Apr	China Southern
01 Apr - 08 Apr	T'way Air
09 Apr - 05 May	HK Express
01 Apr - 06 Apr	T'way Air
24 Apr - 24 Apr	Aero K Airlines
09 Apr - 11 Apr	T'way Air
19 Apr - 23 Apr	Peach
09 Apr - 13 Apr	Jeju Air
27 Apr - 04 May	Asiana Airlines
09 Apr - 12 Apr	T'way Air
28 Apr - 01 May	Asiana Airlines
02 Apr - 05 Apr	Jeju Air
27 Apr - 01 May	Korean Air
26 Apr - 01 May	Tigerair Taiwan
28 Apr - 08 May	Asiana Airlines
29 Apr - 06 May	China Eastern
27 Apr - 02 May	Asiana Airlines
26 Apr - 02 May	Asiana Airlines

Also check the deals for one-way 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 return flights from Seoul to Cheju in April from $279

Return flights