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

One-Way flights

16 Aug	Air Canada	direct
22 Aug	Air Canada	direct
24 Aug	Air Canada	direct
18 Aug	Air Canada	direct
28 Aug	Air Canada	direct
26 Aug	Air Canada	direct
27 Aug	Air Canada	direct
30 Aug	Air Canada	direct
01 Aug	Delta
02 Aug	Delta

Also check the deals for return flights from Montreal to Chicago in August.

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 one-way flights from Montreal to Chicago in August from $150

One-Way flights