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

Return flights

24 Jul - 28 Jul	American Airlines
18 Jul - 20 Jul	Air Canada
04 Jul - 08 Jul	Air Canada
25 Jul - 29 Jul	Delta
17 Jul - 21 Jul	Delta
17 Jul - 22 Jul	Delta
11 Jul - 14 Jul	Delta
25 Jul - 10 Aug	Delta
24 Jul - 10 Aug	Delta
18 Jul - 23 Jul	Delta
09 Jul - 14 Jul	Delta
25 Jul - 28 Jul	Delta
31 Jul - 14 Aug	Delta
24 Jul - 10 Aug	United	direct
31 Jul - 17 Aug	United	direct
29 Jul - 05 Aug	United	direct
26 Jul - 10 Aug	Delta
26 Jul - 02 Aug	Delta
31 Jul - 04 Aug	Delta
30 Jul - 06 Aug	Air Canada	direct

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

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 Montreal to Chicago in July from $272

Return flights