AirHint found the following cheapest return flights from Seoul (GMP) to Istanbul (IST) in August 2026 (see full year).

Return flights

30 Aug - 05 Sep	China Southern
25 Aug - 06 Sep	Air China
17 Aug - 21 Aug	Air China
19 Aug - 30 Aug	Air China
20 Aug - 28 Aug	Air China
30 Aug - 10 Sep	China Southern
31 Aug - 10 Sep	China Southern
22 Aug - 28 Aug	Air China
28 Aug - 03 Sep	China Southern
26 Aug - 06 Sep	Air China
21 Aug - 27 Aug	China Southern
09 Aug - 13 Aug	China Southern
21 Aug - 29 Aug	China Southern
23 Aug - 27 Aug	China Southern
17 Aug - 24 Aug	China Southern
24 Aug - 29 Aug	China Southern
10 Aug - 10 Sep	Asiana Airlines
30 Aug - 09 Sep	ANA
29 Aug - 05 Sep	ANA

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 547€

Return flights