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

Return flights

20 Oct - 06 Nov	Condor
20 Oct - 15 Nov	Condor
27 Oct - 22 Nov	Condor
22 Oct - 06 Nov	Condor
20 Oct - 30 Oct	Condor
22 Oct - 15 Nov	Condor
19 Oct - 30 Oct	Condor
22 Oct - 30 Oct	Condor
23 Oct - 30 Oct	Condor
19 Oct - 26 Oct	Condor
20 Oct - 27 Oct	Condor
18 Oct - 26 Oct	Condor
26 Oct - 31 Oct	Condor
24 Oct - 15 Nov	Condor
21 Oct - 15 Nov	Condor
30 Oct - 03 Nov	Condor
29 Oct - 07 Nov	Aer Lingus
31 Oct - 22 Nov	WestJet
22 Oct - 29 Oct	Delta
19 Oct - 30 Oct	Air France	direct

Also check the deals for one-way flights from Seattle to Paris 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 Seattle to Paris in October from 439€

Return flights