Cheap flights from Illinois to Montreal from C$ 209

The month of February is, on average, the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport from Illinois, with most prices found around C$ 91. 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 C$ 114.

The cheapest day to depart on your flight to Montreal Pierre Elliott Trudeau Intl Airport is on a Friday when prices can be found for as low as C$ 264. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 617.

In the afternoon 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 C$ 264. 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$ 507. 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 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 C$ 546 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 C$ 269 on momondo.

There are 2 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.

As of June 2026, 31 flights take off from Illinois and land in Montreal Pierre Elliott Trudeau Intl Airport each day. The most common flight departure time for this route is 6:00p.m., with 40% of daily flights taking off in the afternoon.

As of June 2026, there are 222 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 15% of flights taking off on this day.