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

Return flights

05 Aug - 05 Sep	KLM
25 Aug - 03 Sep	Emirates
28 Aug - 04 Sep	China Eastern
20 Aug - 24 Aug	Lufthansa
20 Aug - 31 Aug	Lufthansa
16 Aug - 25 Aug	SWISS
17 Aug - 24 Aug	Emirates
21 Aug - 28 Aug	Turkish Airlines
24 Aug - 28 Aug	Emirates
31 Aug - 30 Sep	Emirates
24 Aug - 31 Aug	LOT
20 Aug - 30 Aug	Turkish Airlines
06 Aug - 09 Aug	Turkish Airlines
02 Aug - 06 Aug	Air France
30 Aug - 07 Sep	Lufthansa
29 Aug - 06 Sep	Air France

Also check the deals for one-way flights from Seoul to Bucharest 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 Seoul to Bucharest in August from 597€

Return flights