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

Return flights

06 Jul - 10 Jul	Jeju Air
20 Jul - 24 Jul	Jeju Air
02 Jul - 05 Jul	Jeju Air
21 Jul - 10 Aug	T'way Air
27 Jul - 10 Aug	T'way Air
27 Jul - 03 Aug	T'way Air
31 Jul - 03 Aug	T'way Air
01 Jul - 06 Jul	Jeju Air
19 Jul - 27 Jul	Jeju Air
22 Jul - 28 Jul	Jeju Air
16 Jul - 20 Jul	T'way Air
17 Jul - 20 Jul	T'way Air
02 Jul - 10 Jul	T'way Air
03 Jul - 13 Jul	T'way Air
31 Jul - 05 Aug	T'way Air
26 Jul - 21 Aug	T'way Air
29 Jul - 04 Aug	Jeju Air
30 Jul - 04 Aug	Jeju Air
28 Jul - 01 Aug	T'way Air
24 Jul - 01 Aug	T'way Air

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

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 July from 230€

Return flights