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

Return flights

13 May - 22 May	Vietnam Airlines
13 May - 20 May	Scoot	direct
16 May - 23 May	Scoot	direct
20 May - 25 May	Scoot	direct
15 May - 18 May	Scoot
15 May - 20 May	Scoot
06 May - 12 May	Scoot
12 May - 20 May	AirAsia X
12 May - 19 May	AirAsia X
12 May - 16 May	AirAsia X
28 May - 08 Jun	AirAsia X
28 May - 07 Jun	AirAsia X
28 May - 14 Jun	AirAsia X
28 May - 15 Jun	AirAsia X
19 May - 08 Jun	AirAsia X
19 May - 07 Jun	AirAsia X
12 May - 01 Jun	AirAsia X
28 May - 06 Jun	AirAsia X
28 May - 10 Jun	AirAsia X
28 May - 09 Jun	AirAsia X

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 188€

Return flights