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

Return flights

16 Sep - 07 Oct	United
03 Sep - 13 Sep	United
03 Sep - 16 Sep	United	direct
16 Sep - 23 Sep	Air Canada	direct
18 Sep - 21 Sep	United	direct
18 Sep - 21 Sep	Air Canada
18 Sep - 22 Sep	United	direct
18 Sep - 22 Sep	Air Canada
03 Sep - 10 Sep	Air Canada
02 Sep - 09 Sep	United
16 Sep - 26 Sep	United
17 Sep - 08 Oct	Air Canada
28 Sep - 05 Oct	PAL Airlines

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

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Cheapest return flights from Quebec to Chicago in September from 165€

Return flights