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

Return flights

19 Oct - 25 Oct	Air China
14 Oct - 21 Oct	Air China
12 Oct - 23 Oct	Air China
21 Oct - 25 Oct	Air China
17 Oct - 25 Oct	Air China
17 Oct - 01 Nov	Air China
24 Oct - 06 Nov	Air China
19 Oct - 30 Oct	Air China
12 Oct - 22 Oct	Air China
15 Oct - 25 Oct	Air China
15 Oct - 22 Oct	Air China
16 Oct - 22 Oct	Etihad Airways
25 Oct - 05 Nov	Etihad Airways
27 Oct - 17 Nov	China Southern
26 Oct - 05 Nov	China Southern
26 Oct - 03 Nov	China Southern
25 Oct - 01 Nov	Etihad Airways
18 Oct - 01 Nov	Etihad Airways
26 Oct - 02 Nov	Singapore Airlines
26 Oct - 06 Nov	Singapore Airlines

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

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 October from 463€

Return flights