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

Return flights

17 Sep - 22 Sep	Air China
12 Sep - 19 Sep	Air China
09 Sep - 16 Sep	Air China
15 Sep - 18 Sep	Air China
13 Sep - 19 Sep	Air China
11 Sep - 19 Oct	Air China
05 Sep - 13 Sep	Air China
05 Sep - 12 Sep	Air China
21 Sep - 24 Sep	Etihad Airways
17 Sep - 22 Sep	Lufthansa	direct
15 Sep - 07 Oct	Singapore Airlines
03 Sep - 07 Sep	Lufthansa
21 Sep - 06 Oct	Air Astana
28 Sep - 12 Oct	Air Astana
30 Sep - 06 Oct	Air Astana
27 Sep - 04 Oct	Air Astana
28 Sep - 04 Oct	Air Astana
23 Sep - 05 Oct	Air Astana
25 Sep - 02 Oct	Air Astana
26 Sep - 10 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 $672

Return flights