$166 Find Cheap Flights from Montreal to Chicago O'Hare Airport - Compare and Save

If you are looking for a flight deal from Montreal to Chicago O'Hare Airport, look for departures on Thursdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Chicago O'Hare Airport, Thursday is the cheapest day to fly and Sunday is the most expensive.

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport is April, where tickets cost $264 (return) on average. On the other hand, the most expensive months are June and October, where the average cost of round-trip tickets is $462 and $418 respectively.

No, with an average price for the route of $349, prices are generally cheapest when you fly direct.

To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport, you should book around 5 weeks before departure, which saves you about 58% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

In the past 5 days, the cheapest round-trip tickets from Montreal to Chicago O'Hare Airport were found on Air Canada ($265) and Delta ($280).

Air Canada connects Montreal to Chicago O'Hare Airport with 21 flights per week. United Airlines also offers 21 flights per week, while American Airlines follows with 14 flights per week.

Toronto (YYZ) is the top choice – 50% of KAYAK users who clicked on 1-stop flights from Montreal to Chicago O'Hare Airport picked an itinerary connecting there.

Flights via Philadelphia (PHL) offer the most affordable fares, with an average round-trip price of $189.

Consider flying via Toronto (YTZ) for the shortest journey. The average one-way travel time for flights connecting there is 5h 05m.

If you prefer a quick connection, Philadelphia (PHL) often has the shortest layovers from Montreal to Chicago O'Hare Airport, with an average of 0h 42m.

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are 8 nonstop flights that take off from Montreal Pierre Elliott Trudeau Intl Airport and land in Chicago O'Hare Intl Airport, with an average flight time of 2h 38m. The most common departure time is 9:00 am and most flights take off in the morning. Each week, there are 56 flights and there are the same amount of flights each day (8).