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

Return flights

25 Sep - 01 Oct	TAP
15 Sep - 25 Sep	TAP
29 Sep - 07 Oct	TAP
06 Sep - 22 Sep	Spirit Airlines
30 Sep - 10 Oct	Spirit Airlines
08 Sep - 22 Sep	Spirit Airlines
25 Sep - 30 Sep	TAP
02 Sep - 08 Sep	Aer Lingus
30 Sep - 25 Oct	Spirit Airlines
06 Sep - 14 Sep	Spirit Airlines
23 Sep - 30 Sep	Icelandair
22 Sep - 03 Oct	TAP
11 Sep - 18 Sep	TAP
16 Sep - 24 Sep	Spirit Airlines
07 Sep - 22 Sep	Spirit Airlines
08 Sep - 04 Oct	Spirit Airlines
23 Sep - 01 Oct	Spirit Airlines
30 Sep - 07 Oct	Icelandair
17 Sep - 11 Oct	Spirit Airlines
26 Sep - 03 Oct	TAP

Also check the deals for one-way flights from Chicago to Paris 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.

Book a cheap hotel in Paris

Cheap car rent in Paris

Cheapest return flights from Chicago to Paris in September from $480

Return flights