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

Return flights

03 Dec - 12 Dec	Air China
03 Dec - 10 Jan	Lufthansa
04 Dec - 09 Dec	Air China
04 Dec - 07 Dec	Lufthansa
16 Dec - 08 Jan	Lufthansa
13 Dec - 10 Jan	Lufthansa
15 Dec - 10 Jan	Lufthansa
02 Dec - 14 Dec	Air China
02 Dec - 09 Dec	Lufthansa
06 Dec - 10 Dec	Air France
07 Dec - 14 Dec	LOT
08 Dec - 16 Dec	LOT
06 Dec - 08 Dec	Lufthansa
22 Dec - 31 Dec	LOT
23 Dec - 01 Jan	LOT
22 Dec - 27 Jan	Emirates
17 Dec - 23 Jan	Lufthansa
19 Dec - 19 Jan	Emirates
23 Dec - 02 Jan	LOT
23 Dec - 03 Jan	LOT

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 482€

Return flights