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

Return flights

24 Aug - 03 Sep	China Southern
12 Aug - 19 Aug	Qatar Airways
13 Aug - 24 Aug	Qatar Airways
24 Aug - 04 Sep	China Southern
15 Aug - 24 Aug	Qatar Airways
14 Aug - 23 Aug	Qatar Airways
06 Aug - 13 Aug	Qatar Airways
09 Aug - 16 Aug	Air Astana
06 Aug - 17 Aug	Air Astana
10 Aug - 16 Aug	Air Astana
27 Aug - 03 Sep	Air Astana
03 Aug - 09 Aug	Air Astana
10 Aug - 14 Aug	Air Astana
23 Aug - 02 Sep	Air Astana
27 Aug - 03 Sep	Asiana Airlines	direct
24 Aug - 04 Sep	Korean Air	direct
23 Aug - 02 Sep	Turkish Airlines	direct
24 Aug - 03 Sep	Turkish Airlines	direct

Also check the deals for one-way flights from Istanbul to Seoul 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 Istanbul to Seoul in August from $680

Return flights