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

Return flights

17 May - 18 May	AirAsia
14 May - 19 May	AirAsia
10 May - 17 May	AirAsia
11 May - 16 May	AirAsia
14 May - 21 May	AirAsia
14 May - 17 May	AirAsia
19 May - 10 Jun	AirAsia
12 May - 19 May	AirAsia
10 May - 14 May	AirAsia
07 May - 14 May	AirAsia
15 May - 30 Jun	Air Macau
07 May - 18 May	AirAsia
29 May - 02 Jun	Vietnam Airlines
20 May - 10 Jun	Vietnam Airlines
19 May - 11 Jun	AirAsia
16 May - 04 Jun	Vietnam Airlines
17 May - 04 Jun	Vietnam Airlines
26 May - 04 Jun	Vietnam Airlines
23 May - 05 Jun	Vietnam Airlines
27 May - 01 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 204€

Return flights