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

Return flights

27 Oct - 05 Nov	Etihad Airways
27 Oct - 04 Nov	Etihad Airways
14 Oct - 20 Oct	Air China
15 Oct - 30 Oct	Air China
19 Oct - 23 Oct	Air China
14 Oct - 23 Oct	Air China
12 Oct - 16 Oct	Air China
17 Oct - 30 Oct	Air China
13 Oct - 20 Oct	Air China
18 Oct - 25 Oct	Etihad Airways
20 Oct - 29 Oct	Etihad Airways
11 Oct - 19 Oct	China Southern
23 Oct - 03 Nov	China Southern
05 Oct - 05 Nov	Qatar Airways
30 Oct - 06 Nov	Qatar Airways
28 Oct - 04 Nov	Qatar Airways
11 Oct - 13 Nov	Qatar Airways
24 Oct - 02 Nov	Qatar Airways
26 Oct - 04 Nov	China Southern
31 Oct - 07 Nov	Etihad Airways

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 481€

Return flights