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

Return flights

13 May - 20 May	Scoot	direct
13 May - 18 May	Scoot	direct
25 May - 28 May	Vietnam Airlines
22 May - 26 May	Vietnam Airlines
04 May - 08 May	Vietnam Airlines
11 May - 15 May	Vietnam Airlines
06 May - 09 May	Vietnam Airlines
05 May - 11 May	Vietnam Airlines
17 May - 20 May	Vietnam Airlines
16 May - 19 May	Vietnam Airlines
30 May - 21 Jun	Vietnam Airlines
30 May - 21 Jun	Korean Air	direct

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 $208

Return flights