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

Return flights

20 Apr - 22 Apr	Jeju Air
20 Apr - 28 Apr	Jeju Air
09 Apr - 14 Apr	Jeju Air
14 Apr - 17 Apr	Jeju Air
06 Apr - 28 Apr	Jeju Air
17 Apr - 22 Apr	Jeju Air
02 Apr - 15 Apr	Jeju Air
14 Apr - 16 Apr	Jeju Air
20 Apr - 23 Apr	Jeju Air
21 Apr - 23 Apr	Jeju Air
09 Apr - 10 May	Jeju Air
23 Apr - 10 May	Jeju Air
08 Apr - 16 May	Jeju Air
24 Apr - 07 May	Jeju Air
29 Apr - 05 May	T'way Air
03 Apr - 10 May	Jeju Air
28 Apr - 04 May	T'way Air
28 Apr - 05 May	T'way Air
30 Apr - 05 May	T'way Air
29 Apr - 04 May	T'way Air

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

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 April from 279€

Return flights