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

Return flights

01 Dec - 12 Dec	Ryanair
01 Dec - 10 Dec	Ryanair
01 Dec - 14 Dec	Ryanair
01 Dec - 15 Dec	Ryanair
01 Dec - 31 Dec	Ryanair
14 Dec - 14 Jan	Scandinavian Airlines
01 Dec - 13 Dec	LOT
02 Dec - 16 Dec	LOT
01 Dec - 11 Dec	Finnair
02 Dec - 11 Dec	Finnair
03 Dec - 14 Dec	Finnair
31 Dec - 11 Jan	Finnair
30 Dec - 11 Jan	Finnair
12 Dec - 18 Jan	Finnair
08 Dec - 07 Jan	Finnair
29 Dec - 12 Jan	Finnair
26 Dec - 18 Jan	Finnair
11 Dec - 01 Jan	Finnair
10 Dec - 02 Jan	Finnair
14 Dec - 14 Jan	Lufthansa	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 600€

Return flights