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

Return flights

03 Dec - 08 Dec	Air France
04 Dec - 08 Dec	Air France
08 Dec - 11 Dec	Air France
04 Dec - 10 Dec	Air France
03 Dec - 09 Dec	Air France
03 Dec - 10 Dec	Air France
07 Dec - 11 Dec	KLM
18 Dec - 21 Dec	Air China
15 Dec - 30 Dec	Air China
13 Dec - 16 Jan	Air France
11 Dec - 16 Jan	Air France
03 Dec - 07 Dec	Air China
10 Dec - 04 Jan	Air China
02 Dec - 06 Jan	Air France
11 Dec - 15 Jan	Air France
19 Dec - 12 Jan	T'way Air	direct
27 Dec - 12 Jan	T'way Air	direct
12 Dec - 16 Jan	T'way Air	direct
29 Dec - 12 Jan	T'way Air	direct
18 Dec - 02 Jan	Air China

Also check the deals for one-way flights from Seoul to Frankfurt 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 Frankfurt in December from 490€

Return flights