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

Return flights

03 Dec - 11 Dec	China Southern
10 Dec - 01 Jan	China Southern
03 Dec - 09 Dec	China Southern
10 Dec - 08 Jan	China Southern
08 Dec - 27 Jan	China Southern
17 Dec - 08 Jan	China Southern
24 Dec - 01 Jan	China Southern
17 Dec - 15 Jan	China Southern
17 Dec - 01 Jan	China Southern
17 Dec - 13 Jan	China Southern
24 Dec - 08 Jan	China Southern
24 Dec - 13 Jan	China Southern
01 Dec - 07 Dec	China Eastern
02 Dec - 08 Dec	Air China
03 Dec - 07 Dec	Air China
03 Dec - 08 Dec	Air China
04 Dec - 09 Dec	Air China
04 Dec - 08 Dec	Air China
03 Dec - 05 Dec	Air China
06 Dec - 09 Dec	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 $406

Return flights