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

Return flights

27 May - 30 May	Air China
22 May - 24 May	Air China
16 May - 20 May	Air China
09 May - 13 May	Air China
10 May - 13 May	Air China
22 May - 25 May	Air China
01 May - 05 May	Air China
07 May - 13 May	Air China
01 May - 06 May	Air China
03 May - 06 May	Air China

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

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 May from $533

Return flights