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

Return flights

29 Sep - 21 Oct	Air France
29 Sep - 15 Oct	Air France
14 Sep - 18 Sep	Ryanair
10 Sep - 19 Sep	Norwegian Air Sweden AOC
22 Sep - 28 Sep	Norwegian Air Sweden AOC
25 Sep - 07 Oct	KLM
25 Sep - 06 Oct	KLM
12 Sep - 14 Sep	Norwegian Air Sweden AOC
05 Sep - 12 Sep	Ryanair
16 Sep - 30 Sep	Ryanair
03 Sep - 18 Sep	Air France

Also check the deals for one-way flights from Riga 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 Riga to Seoul in September from $743

Return flights