AirHint found the following cheapest return flights from Paris (CDG) to Seoul (ICN) in August 2025 (see full year).

Return flights

20 Aug - 28 Sep	Air India
31 Aug - 16 Sep	Air India
26 Aug - 16 Sep	Air India
31 Aug - 09 Sep	KLM
26 Aug - 04 Sep	Finnair
20 Aug - 04 Sep	Finnair
29 Aug - 14 Sep	Finnair
29 Aug - 10 Sep	Finnair
29 Aug - 07 Sep	Finnair
26 Aug - 12 Sep	Finnair
20 Aug - 31 Aug	Finnair
21 Aug - 31 Aug	Finnair
20 Aug - 27 Aug	Finnair
24 Aug - 30 Aug	LOT
23 Aug - 30 Aug	LOT
21 Aug - 25 Aug	Finnair
27 Aug - 31 Aug	Finnair
23 Aug - 29 Aug	Finnair
25 Aug - 31 Aug	Finnair
28 Aug - 31 Aug	Finnair

Also check the deals for one-way flights from Paris to Seoul in August.

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 Paris to Seoul in August from $673

Return flights