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

Return flights

30 Dec - 21 Jan	Ryanair
31 Dec - 15 Jan	Ryanair
29 Dec - 28 Jan	T'way Air
30 Dec - 19 Jan	Ryanair
29 Dec - 28 Jan	T'way Air	direct
29 Dec - 26 Jan	T'way Air	direct
29 Dec - 15 Jan	T'way Air
29 Dec - 17 Jan	T'way Air
29 Dec - 18 Jan	Ryanair
30 Dec - 18 Jan	Etihad Airways
24 Dec - 29 Dec	Ryanair
24 Dec - 28 Dec	Ryanair
25 Dec - 29 Dec	Asiana Airlines	direct
25 Dec - 30 Dec	Asiana Airlines	direct
25 Dec - 27 Dec	Asiana Airlines	direct
23 Dec - 29 Dec	T'way Air	direct
23 Dec - 28 Dec	Ryanair
22 Dec - 28 Dec	Ryanair
24 Dec - 29 Dec	T'way Air	direct
22 Dec - 29 Dec	Ryanair

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 526€

Return flights