AirHint found the following cheapest return flights from Chicago (ORD) to Paris (ORY) in October 2025 (see full year).

Return flights

18 Oct - 25 Oct	TAP
24 Oct - 30 Oct	TAP
08 Oct - 15 Oct	TAP
16 Oct - 25 Oct	TAP
25 Oct - 19 Nov	TAP
11 Oct - 17 Oct	TAP
08 Oct - 12 Oct	TAP
01 Oct - 28 Oct	Spirit Airlines
01 Oct - 10 Oct	Spirit Airlines
11 Oct - 18 Oct	Scandinavian Airlines
02 Oct - 09 Oct	Iberia
30 Oct - 04 Nov	Iberia

Also check the deals for one-way flights from Chicago 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 Chicago to Paris in October from 331€

Return flights