AirHint found the following cheapest one-way flights from Seoul (GMP) to Istanbul (IST) in August 2025 (see full year).

One-Way flights

27 Aug	China Southern
22 Aug	China Southern
11 Aug	China Southern
20 Aug	China Southern
13 Aug	China Southern
18 Aug	China Southern
31 Aug	Asiana Airlines
29 Aug	China Southern
06 Aug	China Southern
17 Aug	Asiana Airlines

Also check the deals for return 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 one-way flights from Seoul to Istanbul in August from 267€

One-Way flights