AirHint found the following cheapest return flights from Frankfurt (FRA) to Seoul (ICN) in September 2026 (see full year).

Return flights

25 Sep - 09 Oct	Air China
19 Sep - 10 Oct	Air China
22 Sep - 29 Oct	Air China
01 Sep - 10 Oct	Air China
22 Sep - 05 Oct	Air China
20 Sep - 05 Oct	Air China
17 Sep - 07 Oct	Air China
16 Sep - 07 Oct	Air China
14 Sep - 07 Oct	Air China
15 Sep - 07 Oct	Air China
04 Sep - 13 Sep	MIAT Mongolian Airlines
13 Sep - 28 Sep	Ryanair
04 Sep - 17 Sep	Air China
01 Sep - 09 Sep	Air China
18 Sep - 30 Sep	Air China
07 Sep - 19 Sep	Air China
10 Sep - 27 Sep	Air China
07 Sep - 12 Sep	Air China
01 Sep - 08 Sep	Air China
08 Sep - 12 Sep	Air China

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

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 September from 572€

Return flights