Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Chicago from $180

The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Montreal Pierre Elliott Trudeau Intl Airport averaging around $300.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Thursday when prices can be found for as low as $437. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Montreal Pierre Elliott Trudeau Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $708.

Flying to Chicago O'Hare Intl Airport from Montreal Pierre Elliott Trudeau Intl Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $489 when looking at flights departing at noon. Try not to purchase tickets in the morning because they tend to be around $538. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $370 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Montreal Pierre Elliott Trudeau Intl Airport for as low as $224 on momondo.

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

No. A direct flight is the cheapest option for a flight between Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport.

As of October 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to Chicago O'Hare Intl Airport flights are approximately 7% cheaper when compared to flights at the same time last year.

United Airlines and Delta are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to Chicago O'Hare Intl

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 72% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 4 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

The number of flights available between Montreal Pierre Elliott Trudeau Intl Airport and Chicago O'Hare Intl Airport is 14 per day as of October 2026. The most frequent departure time is 12:00PM, with 69% of daily flights leaving in the afternoon.

The number of flights available between Montreal Pierre Elliott Trudeau Intl Airport and Chicago O'Hare Intl Airport is 98 per week as of October 2026. The most frequent departure day is Thu, with 27% of weekly flights leaving on this day.