AirHint found the following cheapest return flights from Busan (PUS) to Istanbul (IST) in October 2025 (see full year).

Return flights

16 Oct - 19 Oct	Air China
18 Oct - 24 Oct	Air China
23 Oct - 27 Oct	Singapore Airlines
17 Oct - 22 Oct	Korean Air
17 Oct - 20 Oct	Korean Air
13 Oct - 22 Oct	Korean Air
16 Oct - 21 Oct	Asiana Airlines
15 Oct - 21 Oct	Asiana Airlines
13 Oct - 21 Oct	Asiana Airlines
17 Oct - 21 Oct	Asiana Airlines
20 Oct - 03 Nov	Korean Air
29 Oct - 04 Nov	Philippine Airlines
31 Oct - 08 Nov	Philippine Airlines

Also check the deals for one-way flights from Busan 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 Busan to Istanbul in October from 539€

Return flights