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

Return flights

19 Sep - 27 Sep	MIAT Mongolian Airlines
02 Sep - 16 Sep	Air China
17 Sep - 22 Sep	Air China
02 Sep - 10 Sep	Air China
16 Sep - 13 Oct	Air China
13 Sep - 23 Sep	Air China
16 Sep - 12 Oct	Air China
17 Sep - 01 Oct	Air China
17 Sep - 22 Sep	Lufthansa	direct
21 Sep - 24 Sep	Etihad Airways
02 Sep - 10 Sep	Lufthansa	direct
01 Sep - 14 Sep	Air China
03 Sep - 16 Sep	Air China
28 Sep - 07 Oct	Emirates
24 Sep - 03 Oct	Air Astana
24 Sep - 05 Oct	Air Astana
26 Sep - 10 Oct	Air Astana
19 Sep - 03 Oct	Air Astana
24 Sep - 04 Oct	Air Astana
26 Sep - 03 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 542€

Return flights