AirHint found the following cheapest return flights from Seoul (ICN) to Bucharest (OTP) in October 2025 (see full year).

Return flights

14 Oct - 21 Oct	MIAT Mongolian Airlines
15 Oct - 06 Nov	Air France
22 Oct - 25 Oct	China Eastern
21 Oct - 26 Oct	LOT
10 Oct - 14 Oct	China Eastern
15 Oct - 31 Oct	LOT
23 Oct - 08 Nov	LOT
21 Oct - 24 Oct	LOT
15 Oct - 24 Oct	LOT
13 Oct - 16 Oct	Emirates
30 Oct - 06 Nov	Emirates
31 Oct - 03 Nov	Emirates
30 Oct - 08 Nov	Emirates
31 Oct - 02 Nov	LOT
31 Oct - 01 Nov	Emirates
22 Oct - 24 Oct	Lufthansa
07 Oct - 14 Oct	Emirates

Also check the deals for one-way flights from Seoul to Bucharest 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 Bucharest in October from $677

Return flights