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

Return flights

11 May - 28 May	AirAsia
16 May - 18 May	Air Macau
15 May - 18 May	Air Macau
14 May - 19 May	AirAsia
11 May - 19 May	AirAsia
12 May - 19 May	AirAsia
11 May - 21 May	AirAsia
07 May - 14 May	AirAsia
07 May - 12 May	AirAsia
07 May - 15 May	AirAsia
27 May - 01 Jun	Hainan Airlines
31 May - 10 Jun	Scoot	direct
29 May - 02 Jun	Vietnam Airlines
28 May - 01 Jun	Vietnam Airlines
28 May - 08 Jun	Vietnam Airlines
28 May - 09 Jun	Vietnam Airlines
28 May - 07 Jun	Vietnam Airlines
28 May - 06 Jun	Vietnam Airlines
27 May - 03 Jun	Vietnam Airlines
27 May - 04 Jun	Vietnam Airlines

Also check the deals for one-way flights from Singapore to Seoul 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 Singapore to Seoul in May from $237

Return flights