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

Return flights

19 Sep - 12 Oct	MIAT Mongolian Airlines
08 Sep - 15 Sep	Lufthansa
08 Sep - 22 Sep	Lufthansa
16 Sep - 20 Sep	Lufthansa
14 Sep - 20 Sep	Air China
17 Sep - 25 Sep	Air China
07 Sep - 14 Sep	T'way Air	direct
07 Sep - 18 Sep	Air China
11 Sep - 15 Sep	Air China
06 Sep - 20 Sep	T'way Air	direct
16 Sep - 23 Sep	Air China
29 Sep - 06 Oct	Vietnam Airlines
30 Sep - 03 Oct	Vietnam Airlines
28 Sep - 05 Oct	Vietnam Airlines
19 Sep - 02 Oct	Vietnam Airlines
17 Sep - 11 Oct	Air China
29 Sep - 13 Oct	China Airlines
20 Sep - 12 Oct	China Airlines
17 Sep - 08 Oct	Air China
20 Sep - 09 Oct	China Airlines

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.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt

Cheapest return flights from Seoul to Frankfurt in September from $605

Return flights