Cheapest return flights from Montreal to Chicago in September from 149€

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

Return flights

07 Sep - 14 Sep Air Canada direct
09 Sep - 16 Sep Air Canada direct
13 Sep - 20 Sep Air Canada direct
17 Sep - 24 Sep Air Canada direct
23 Sep - 30 Sep Air Canada direct
06 Sep - 13 Sep Air Canada direct
08 Sep - 15 Sep Air Canada direct
16 Sep - 23 Sep Air Canada direct
20 Sep - 27 Sep Air Canada direct
22 Sep - 29 Sep Air Canada direct
27 Sep - 04 Oct Air Canada direct
26 Sep - 03 Oct Air Canada direct
30 Sep - 07 Oct Air Canada direct
24 Sep - 01 Oct United direct
03 Sep - 02 Oct Delta
29 Sep - 06 Oct Air Canada direct
19 Sep - 02 Oct Air Canada direct
03 Sep - 02 Oct Air Canada direct
28 Sep - 05 Oct Air Canada direct

Also check the deals for one-way flights from Montreal to Chicago in September.

Skyscanner

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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