Cheap flights from Chicago O'Hare Intl Airport to Montreal from $145

The month of April is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from Chicago O'Hare Intl Airport averaging around $268.

The cheapest day to depart from Chicago O'Hare Intl Airport 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 $561. Flights from Chicago O'Hare Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport on a Sunday will generally be more expensive and average around $820. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

At noon is the cheapest time of day to fly from Chicago O'Hare Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport when you can find flight prices for as low as $624. Flying to Montreal Pierre Elliott Trudeau Intl Airport at noon 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 $756.

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

You are more likely to see cheaper flights to Montreal Pierre Elliott Trudeau Intl Airport from Chicago O'Hare Intl Airport 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 $384 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 O'Hare Intl Airport for as low as $172 on momondo.

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport 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.

You could potentially save up to 8% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport flight.

As of August 2026, prices for Chicago O'Hare Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport flights are approximately 1% cheaper when compared to flights at the same time last year.

Delta and United Airlines are the most popular carriers operating from Chicago O'Hare Intl 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 O'Hare Intl Airport 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 142 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 14% of their flights experiencing any sort of delay.

26 flights are operational daily from Chicago O'Hare Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport as of August 2026. The most popular departure time for this route is 2:00PM, with 62% of flights per day taking off in the afternoon.

185 flights are operational weekly from Chicago O'Hare Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport as of August 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.