AirHint found the following cheapest return flights from Seoul (ICN) to Istanbul (IST) in August 2025 (see full year).

Return flights

26 Aug - 02 Sep	Etihad Airways
20 Aug - 28 Aug	Emirates
18 Aug - 28 Aug	Emirates
20 Aug - 04 Sep	Emirates
27 Aug - 09 Sep	Emirates
11 Aug - 26 Aug	Emirates
18 Aug - 26 Aug	Emirates
20 Aug - 26 Aug	Emirates
11 Aug - 21 Aug	Emirates
06 Aug - 12 Aug	Emirates
06 Aug - 28 Aug	Emirates
25 Aug - 28 Aug	Emirates
20 Aug - 02 Sep	Emirates
11 Aug - 27 Aug	Emirates
27 Aug - 08 Sep	Emirates
06 Aug - 03 Sep	Emirates
12 Aug - 30 Sep	Emirates
27 Aug - 01 Sep	Emirates
27 Aug - 03 Sep	Emirates
25 Aug - 01 Sep	Emirates

Also check the deals for one-way flights from Seoul to Istanbul in August.

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 Istanbul in August from 450€

Return flights