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

Return flights

28 Dec - 14 Jan	Scandinavian Airlines
02 Dec - 16 Dec	LOT
30 Dec - 12 Jan	Scandinavian Airlines
28 Dec - 14 Jan	T'way Air	direct
01 Dec - 31 Dec	Ryanair
03 Dec - 10 Dec	Finnair
05 Dec - 10 Dec	Finnair
01 Dec - 09 Dec	Finnair
30 Dec - 15 Jan	Finnair
29 Dec - 12 Jan	Finnair
11 Dec - 25 Dec	Finnair
01 Dec - 17 Dec	LOT
05 Dec - 28 Dec	Finnair
07 Dec - 31 Dec	Finnair
03 Dec - 17 Dec	Finnair
14 Dec - 16 Jan	LOT
10 Dec - 07 Jan	MIAT Mongolian Airlines
14 Dec - 11 Jan	Finnair
18 Dec - 07 Jan	T'way Air	direct
26 Dec - 07 Jan	T'way Air	direct

Also check the deals for one-way flights from Frankfurt to Seoul 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 Frankfurt to Seoul in December from 647€

Return flights