AirHint found the following cheapest return flights from Montreal (YUL) to Chicago (ORD) in March 2026 (see full year).

Return flights

07 Mar - 14 Mar	WestJet
15 Mar - 22 Mar	WestJet
16 Mar - 23 Mar	WestJet
20 Mar - 27 Mar	WestJet
24 Mar - 31 Mar	Avianca
06 Mar - 09 Mar	Air Canada	direct
04 Mar - 11 Mar	Avianca
10 Mar - 17 Mar	Avianca
18 Mar - 25 Mar	Avianca
01 Mar - 08 Mar	Air Canada	direct
25 Mar - 01 Apr	Air Canada	direct
26 Mar - 02 Apr	Air Canada	direct
27 Mar - 03 Apr	Air Canada	direct
28 Mar - 04 Apr	Air Canada	direct
29 Mar - 05 Apr	Air Canada	direct
31 Mar - 07 Apr	Air Canada	direct
30 Mar - 06 Apr	WestJet
30 Mar - 06 Apr	Air Canada	direct

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

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 March from $313

Return flights