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

Return flights

22 Oct - 29 Oct	LOT
21 Oct - 28 Oct	LOT
22 Oct - 28 Oct	LOT
22 Oct - 12 Nov	LOT
25 Oct - 11 Nov	LOT
22 Oct - 05 Nov	LOT
21 Oct - 04 Nov	LOT
25 Oct - 08 Nov	LOT
28 Oct - 11 Nov	LOT
28 Oct - 08 Nov	LOT
21 Oct - 08 Nov	LOT
27 Oct - 12 Nov	LOT
22 Oct - 15 Nov	LOT
21 Oct - 27 Oct	LOT
01 Oct - 22 Oct	Lufthansa
01 Oct - 24 Oct	Lufthansa
01 Oct - 23 Oct	Lufthansa
01 Oct - 10 Oct	Lufthansa
05 Oct - 16 Oct	KLM
01 Oct - 21 Oct	Lufthansa

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

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 October from $638

Return flights