Cheap flights from Chicago to Montreal from C$ 208

The month of February is, on average, the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport from Chicago, with most prices found around C$ 367. 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 C$ 401.

The cheapest day to depart on your flight to Montreal Pierre Elliott Trudeau Intl Airport is on a Tuesday when prices can be found for as low as C$ 240. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 554.

In the afternoon 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 C$ 299. Flying to Montreal Pierre Elliott Trudeau Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around C$ 479. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 C$ 532 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 C$ 237 on momondo.

There are 2 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.

You could potentially save up to 12% on your flight if you consider stops on a Chicago to Montreal Pierre Elliott Trudeau Intl Airport flight.

As of September 2026, prices for Chicago to Montreal Pierre Elliott Trudeau Intl Airport flights are approximately 34% more expensive when compared to flights at the same time last year.

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 139 minutes.

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

Thursday is statistically the day of the week that experiences the fewest 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 has had the least delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

As of September 2026, there are 21 flights per day flying from Chicago to Montreal Pierre Elliott Trudeau Intl Airport. The most common time of day flights depart is 2:00p.m., with 59% of flights taking off in the afternoon.

As of September 2026, 150 flights take off from Chicago and land in Montreal Pierre Elliott Trudeau Intl Airport each week. The most common flight departure day for this route is Tue, with 20% of weekly flights taking off on this day.