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

Return flights

04 Sep - 07 Sep	Wizz Air Malta
09 Sep - 14 Oct	Air France
17 Sep - 15 Oct	KLM
06 Sep - 24 Sep	Turkish Airlines
16 Sep - 14 Oct	Air France
16 Sep - 15 Oct	Air France
17 Sep - 16 Oct	KLM
15 Sep - 24 Sep	Wizz Air Malta
04 Sep - 11 Sep	Ryanair
01 Sep - 09 Sep	Ryanair
18 Sep - 17 Oct	KLM
19 Sep - 25 Sep	Wizz Air Malta
19 Sep - 17 Oct	Air France
18 Sep - 16 Oct	KLM
01 Sep - 06 Sep	Ryanair
18 Sep - 10 Oct	KLM
04 Sep - 12 Sep	Qatar Airways
02 Sep - 13 Sep	Air France
19 Sep - 18 Oct	Air France
10 Sep - 17 Sep	Air France

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 618€

Return flights