AirHint found the following cheapest return flights from Seoul (GMP) to Singapore (SIN) in June 2025 (see full year).

Return flights

30 Jun - 02 Jul	Jeju Air
30 Jun - 06 Jul	Jeju Air
30 Jun - 05 Jul	Jeju Air
30 Jun - 16 Jul	Jeju Air
25 Jun - 28 Jun	Jeju Air
24 Jun - 28 Jun	Jeju Air
30 Jun - 04 Jul	Jeju Air
25 Jun - 26 Jun	Jeju Air
24 Jun - 26 Jun	Jeju Air
27 Jun - 30 Jun	Jeju Air
25 Jun - 02 Jul	Jeju Air
26 Jun - 02 Jul	Jeju Air
24 Jun - 01 Jul	Jeju Air
29 Jun - 30 Jun	Jeju Air
24 Jun - 25 Jun	Jeju Air
25 Jun - 30 Jun	Jeju Air
27 Jun - 02 Jul	Jeju Air
23 Jun - 28 Jun	Jeju Air
27 Jun - 01 Jul	Jeju Air
23 Jun - 25 Jun	Jeju Air

Also check the deals for one-way flights from Seoul to Singapore in June.

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 Singapore in June from $323

Return flights