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

Return flights

09 Sep - 16 Sep	Wizz Air Malta
09 Sep - 13 Sep	Turkish Airlines
04 Sep - 18 Sep	KLM
08 Sep - 23 Sep	Air France
09 Sep - 24 Oct	Lufthansa
01 Sep - 07 Sep	Turkish Airlines
30 Sep - 17 Oct	KLM
20 Sep - 24 Sep	Ryanair
13 Sep - 20 Sep	TAROM
05 Sep - 12 Sep	Air France
10 Sep - 17 Sep	Air France
07 Sep - 15 Sep	SWISS
26 Sep - 01 Oct	TAROM

Also check the deals for one-way flights from Bucharest to Seoul in September.

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 Bucharest to Seoul in September from 597€

Return flights