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

Return flights

02 Sep - 10 Sep	China Southern
23 Sep - 28 Sep	MIAT Mongolian Airlines
15 Sep - 20 Sep	Air China
07 Sep - 22 Sep	Air China
07 Sep - 14 Sep	Air China
12 Sep - 16 Sep	Air China
17 Sep - 02 Oct	Air China
15 Sep - 19 Sep	Etihad Airways
16 Sep - 24 Sep	Etihad Airways
16 Sep - 23 Sep	Etihad Airways
15 Sep - 21 Sep	Etihad Airways
14 Sep - 12 Oct	Air China
16 Sep - 04 Oct	Air China
27 Sep - 25 Oct	Etihad Airways
20 Sep - 03 Oct	Air Astana
21 Sep - 05 Oct	Air Astana
20 Sep - 04 Oct	Air Astana
23 Sep - 03 Oct	Air Astana
23 Sep - 05 Oct	Air Astana
23 Sep - 04 Oct	Air Astana

Also check the deals for one-way flights from Seoul to Frankfurt 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 Seoul to Frankfurt in September from 423€

Return flights