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

One-Way flights

29 Aug	China Eastern
26 Aug	Etihad Airways
22 Aug	Centrum Air
28 Aug	China Eastern
27 Aug	China Eastern
31 Aug	China Eastern
21 Aug	China Eastern
30 Aug	China Eastern
23 Aug	China Eastern
26 Aug	Turkish Airlines	direct

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 $295

One-Way flights