Cheapest one-way flights from Montreal to Chicago in September from $156

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

One-Way flights

16 Sep Air Canada direct
19 Sep American Airlines direct
26 Sep Delta
23 Sep Air Canada direct
24 Sep Air Canada direct
17 Sep Air Canada direct
22 Sep Delta
18 Sep Delta
11 Sep Air Transat
12 Sep Porter Airlines (Canada) Ltd

Also check the deals for return 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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