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

Return flights

26 Aug - 18 Sep	Finnair
27 Aug - 10 Sep	Finnair
26 Aug - 11 Sep	Finnair
31 Aug - 15 Sep	China Eastern
27 Aug - 07 Sep	Finnair
29 Aug - 07 Sep	Finnair
27 Aug - 14 Sep	Finnair
26 Aug - 09 Sep	Finnair
29 Aug - 19 Sep	Finnair
01 Aug - 17 Aug	Oman Air
28 Aug - 04 Sep	Finnair
18 Aug - 26 Aug	Air China
18 Aug - 27 Aug	Air China
20 Aug - 28 Aug	Air China
26 Aug - 30 Aug	Air India
27 Aug - 31 Aug	Air India
25 Aug - 31 Aug	Air China
10 Aug - 17 Aug	Air Astana
21 Aug - 28 Aug	Air India
17 Aug - 30 Aug	Etihad Airways

Also check the deals for one-way flights from Frankfurt to Seoul in August.

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 August from 666€

Return flights