Cheap flights from Chicago to Montreal from $149

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

The cheapest day to depart from Chicago 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 $570. Flights from Chicago to Montreal Pierre Elliott Trudeau Intl Airport on a Sunday will generally be more expensive and average around $833. 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 Chicago to Montreal Pierre Elliott Trudeau Intl Airport when you can find flight prices for as low as $613. 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 $754.

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

You are more likely to see cheaper flights to Montreal Pierre Elliott Trudeau Intl Airport from Chicago 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 $390 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 Chicago for as low as $172 on momondo.

There are 4 cabin classes available to choose from on Chicago 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, Air Canada, and Delta are the most popular carriers operating from Chicago 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 Chicago according to our data. Air Canada is the first choice among our users, with 62% 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.

Historically, on average around 20% of flights between Chicago and Montreal have experienced a delay on any given week. The average delay length over the past 12 months has been 141 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

The number of flights available between Chicago and Montreal Pierre Elliott Trudeau Intl Airport is 28 per day as of September 2026. The most frequent departure time is 2:00PM, with 57% of daily flights leaving in the afternoon.

198 flights are operational weekly from Chicago to Montreal Pierre Elliott Trudeau Intl Airport as of September 2026. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.