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

Return flights

15 Dec - 10 Jan	Lufthansa
05 Dec - 09 Dec	Lufthansa
22 Dec - 31 Dec	LOT
24 Dec - 31 Dec	LOT
23 Dec - 31 Dec	LOT
06 Dec - 13 Dec	LOT
10 Dec - 15 Dec	Air France
29 Dec - 05 Jan	LOT
22 Dec - 01 Jan	LOT
15 Dec - 27 Dec	LOT
15 Dec - 28 Dec	LOT
15 Dec - 29 Dec	LOT
31 Dec - 06 Jan	LOT
19 Dec - 16 Jan	Lufthansa
22 Dec - 30 Dec	LOT
29 Dec - 06 Jan	Lufthansa
24 Dec - 03 Jan	Turkish Airlines
26 Dec - 02 Jan	Lufthansa

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

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 December from 490€

Return flights