AirHint found the following cheapest return flights from Seoul (GMP) to Singapore (SIN) in July 2025 (see full year).

Return flights

30 Jul - 04 Aug	China Eastern
22 Jul - 28 Jul	Peach
22 Jul - 01 Aug	Asiana Airlines
25 Jul - 01 Aug	Asiana Airlines
26 Jul - 30 Jul	Peach
24 Jul - 28 Jul	Jeju Air
24 Jul - 29 Jul	Jeju Air
31 Jul - 05 Aug	Jeju Air
31 Jul - 09 Aug	Korean Air
26 Jul - 02 Aug	Peach
31 Jul - 04 Aug	Jeju Air
29 Jul - 02 Aug	Jeju Air
31 Jul - 07 Aug	Jeju Air
25 Jul - 29 Jul	EVA Air
25 Jul - 28 Jul	EVA Air
25 Jul - 27 Jul	Korean Air
31 Jul - 06 Aug	Jeju Air
29 Jul - 31 Jul	Jeju Air
23 Jul - 31 Jul	Korean Air
23 Jul - 28 Jul	Jeju 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 233€

Return flights