Cheap flights from Illinois to Montreal from $148

The month of April is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from Illinois averaging around $291.

The cheapest day to depart from Illinois to Montreal Pierre Elliott Trudeau Intl Airport is on a Thursday. Travelers who choose to depart for Montreal Pierre Elliott Trudeau Intl Airport on a Thursday will often find tickets for as low as $556. Flights from Illinois to Montreal Pierre Elliott Trudeau Intl Airport on a Sunday will generally be more expensive and average around $847. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the morning is the cheapest time of day to fly from Illinois to Montreal Pierre Elliott Trudeau Intl Airport when you can find flight prices for as low as $606. Flying to Montreal Pierre Elliott Trudeau Intl Airport in the morning is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $759.

Fly from Chicago O'Hare Intl to Montreal Pierre Elliott Trudeau Intl for the best Illinois - Montreal Pierre Elliott Trudeau Intl flight prices

You are more likely to see cheaper flights to Montreal Pierre Elliott Trudeau Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal Pierre Elliott Trudeau Intl Airport for around $393 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal Pierre Elliott Trudeau Intl Airport from Illinois for as low as $172 on momondo.

There are 4 cabin classes available to choose from on Illinois to Montreal Pierre Elliott Trudeau Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Porter Airlines, Delta, and United Airlines are the most popular carriers operating from Illinois to Montreal Pierre Elliott Trudeau Intl

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Montreal Pierre Elliott Trudeau Intl Airport from Illinois according to our data. Air Canada is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Montreal Pierre Elliott Trudeau Intl Airport. Keep in mind that there are 5 different airlines that fly to Montreal Pierre Elliott Trudeau Intl Airport on a routine basis, so you have a few additional options to choose from.

23 flights are operational daily from Illinois to Montreal Pierre Elliott Trudeau Intl Airport as of October 2026. The most popular departure time for this route is 2:00PM, with 58% of flights per day taking off in the afternoon.

As of October 2026, there are 161 flights per week flying from Illinois to Montreal Pierre Elliott Trudeau Intl Airport. The most common day of the week flights depart is Wed, with 18% of flights taking off on this day.