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
09 Jul - 16 Jul	Delta
01 Jul - 08 Jul	Delta
04 Jul - 06 Jul	Delta
02 Jul - 04 Jul	Delta
15 Jul - 16 Jul	Delta
17 Jul - 21 Jul	Delta
12 Jul - 19 Jul	WestJet
04 Jul - 08 Jul	Air Canada
18 Jul - 20 Jul	Delta
25 Jul - 01 Aug	Delta
30 Jul - 04 Aug	Delta
01 Jul - 14 Aug	Air Canada	direct
31 Jul - 04 Aug	Delta
31 Jul - 14 Aug	Delta
31 Jul - 14 Aug	United	direct
30 Jul - 06 Aug	United	direct
25 Jul - 01 Aug	Air Canada	direct
30 Jul - 04 Aug	United	direct
31 Jul - 07 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 $273

Return flights