Cheapest return GMP–CJU flights, May

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

Return flights

27 May - 11 Jun Eastar Jet direct
27 May - 17 Jun Eastar Jet direct
12 May - 10 Jun Jeju Air direct
05 May - 30 Jun Jin Air direct
18 May - 25 Jun Jeju Air direct
19 May - 04 Jun Eastar Jet direct
27 May - 16 Jun Eastar Jet direct
27 May - 10 Jun Eastar Jet direct
13 May - 10 Jun Jeju Air direct
28 May - 18 Jun T'way Air direct
19 May - 28 May Eastar Jet direct
27 May - 28 May Eastar Jet direct
18 May - 28 May Eastar Jet direct
05 May - 28 May Jeju Air direct
12 May - 20 May Jin Air direct
26 May - 28 May Jin Air direct
19 May - 21 May Jin Air direct
19 May - 20 May Eastar Jet direct
05 May - 20 May T'way Air direct
06 May - 14 May Jeju Air direct

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

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