Cheap flights from Illinois to Calgary from $143

The month of January is, on average, the cheapest month to fly to Calgary from Illinois, with most prices found around $224. If you aren’t able to travel during the month of January, then book flights to Calgary from Illinois during October instead. Flights to Calgary in October, while not as cheap as those in January, still average around $252.

The cheapest day to depart on your flight to Calgary is on a Friday when prices can be found for as low as $344. This is often the case because there is less demand to fly during this day of the week. Flights from Illinois to Calgary on a Wednesday will generally be more expensive and average around $408. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

The cheapest time of day to fly to Calgary is at noon when flights can be purchased for as low as $282. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $495 on average. Flights to Calgary from Illinois in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Chicago O'Hare Intl to Calgary for the best Illinois - Calgary flight prices

You are more likely to see cheaper flights to Calgary from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Calgary for around $334 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Calgary from Illinois for as low as $317 on momondo.

There are 4 cabin classes available to choose from on Illinois to Calgary flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Delta, United Airlines, and American Airlines are the most popular carriers operating from Illinois to Calgary

WestJet, United Airlines and American Airlines are the top three most popular airlines that fly to Calgary from Illinois according to our data. WestJet is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Calgary. Keep in mind that there are 5 different airlines that fly to Calgary on a routine basis, so you have a few additional options to choose from.

12 flights are operational daily from Illinois to Calgary as of August 2026. The most popular departure time for this route is 8:00PM, with 62% of flights per day taking off in the evening.

As of August 2026, there are 88 flights per week flying from Illinois to Calgary. The most common day of the week flights depart is Fri, with 16% of flights taking off on this day.