AirHint found the following cheapest return flights from Marseille (MRS) to Seoul (ICN) in September 2025 (see full year).

Return flights

18 Sep - 05 Oct	Lufthansa
11 Sep - 09 Oct	Lufthansa
06 Sep - 15 Sep	SWISS
09 Sep - 16 Sep	Lufthansa
04 Sep - 16 Sep	Lufthansa
25 Sep - 16 Oct	Lufthansa
21 Sep - 21 Oct	Lufthansa
10 Sep - 17 Sep	Ryanair
24 Sep - 16 Oct	Air France
06 Sep - 17 Sep	Air France
24 Sep - 09 Oct	Air France
27 Sep - 11 Oct	Lufthansa
16 Sep - 23 Sep	Lufthansa
15 Sep - 24 Sep	Ryanair
04 Sep - 17 Sep	Ryanair
02 Sep - 14 Sep	Ryanair
21 Sep - 05 Oct	Lufthansa
04 Sep - 23 Sep	KLM
20 Sep - 11 Oct	SWISS

Also check the deals for one-way flights from Marseille to Seoul 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 Marseille to Seoul in September from 552€

Return flights