AirHint found the following cheapest one-way flights from Seoul (ICN) to Frankfurt (FRA) in September 2025 (see full year).

One-Way flights

15 Sep	MIAT Mongolian Airlines
11 Sep	T'way Air	direct
09 Sep	T'way Air	direct
08 Sep	T'way Air	direct
17 Sep	Vietnam Airlines
22 Sep	Air China
06 Sep	Air China
17 Sep	T'way Air	direct
29 Sep	China Eastern
20 Sep	Jeju Air

Also check the deals for return 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 one-way flights from Seoul to Frankfurt in September from 229€

One-Way flights