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

Return flights

30 Sep - 06 Oct	Air Canada
28 Sep - 07 Oct	Air Canada
27 Sep - 07 Oct	Air Canada
27 Sep - 03 Oct	Icelandair
26 Sep - 03 Oct	Icelandair
29 Sep - 07 Oct	Lufthansa
30 Sep - 07 Oct	Spirit Airlines
26 Sep - 30 Sep	SWISS
30 Sep - 25 Oct	United
29 Sep - 25 Oct	United
26 Sep - 03 Oct	United	direct
23 Sep - 30 Sep	Air France
22 Sep - 25 Sep	Frontier Airlines
20 Sep - 27 Sep	United
15 Sep - 25 Sep	United
24 Sep - 28 Sep	United
17 Sep - 26 Sep	Air France	direct
15 Sep - 25 Sep	United	direct
16 Sep - 24 Sep	United	direct
25 Sep - 28 Sep	Frontier Airlines

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 459€

Return flights