Cheap flights from Quebec to Illinois from $153

The cheapest month to fly to Illinois from Quebec is in February. Flight prices, which tend to average around $51, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $52.

The cheapest day to depart from Quebec to Illinois is on a Thursday when prices can be found for as low as $419. Flights from Quebec to Illinois on a Monday will generally be more expensive and average around $679. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Quebec to Illinois during this time can be as low as $497. Flights in the morning are often more expensive with an average ticket price of $540.

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

You are more likely to see cheaper flights to Illinois from Quebec when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $351 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Quebec for as low as $225 on momondo.

There are 4 cabin classes available to choose from on Quebec to Illinois 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 United Airlines are the most popular carriers operating from Quebec to Illinois

Air Canada, American Airlines and United Airlines are the top three most popular airlines that fly to Illinois from Quebec according to our data. Air Canada is the first choice among our users, with 75% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

The number of flights available between Quebec and Illinois is 41 per day as of June 2026. The most frequent departure time is 9:00AM, with 59% of daily flights leaving in the afternoon.

As of June 2026, 287 flights take off from Quebec and land in Illinois each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.