Cheap flights from Calgary to Illinois from C$ 131
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Calgary to Illinois departing on 30/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Calgary to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
In general, April is the cheapest month to fly from Calgary to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 261. If you don’t want to visit Illinois in April, then you should wait until February to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 271.
What is the cheapest day to depart on your flight to Illinois?
According to our data, Friday is the cheapest day to fly to Illinois from Calgary. The lowest ticket price found for a Friday departure recently was C$ 651. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Tuesday, with ticket prices averaging around C$ 966.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Calgary to Illinois during this time can be as low as C$ 361. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,447 on average. Flights to Illinois from Calgary at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Calgary to Illinois flight route?
Fly from Calgary to Chicago O'Hare Intl for the best Calgary - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Calgary when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 373 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Calgary for as low as C$ 283 on momondo.
What cabin class options are available on Calgary to Illinois flights?
There are 4 cabin classes available to choose from on Calgary to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Calgary to Illinois?
WestJet, United Airlines, and Air Canada are the most popular carriers operating from Calgary to Illinois
Which airlines fly to Illinois?
WestJet, Air Canada and United Airlines are the top three most popular airlines that fly to Illinois from Calgary according to our data. WestJet is the first choice among our users, with 46% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Calgary to Illinois on average per day?
11 flights are operational daily from Calgary to Illinois as of June 2025. The most popular departure time for this route is 12:00p.m., with 55% of flights per day taking off in the afternoon.
How many flights depart from Calgary to Illinois on average per week?
The number of flights available between Calgary and Illinois is 83 per week as of June 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.
Cheap Calgary to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Calgary to Illinois
Best price found | C$ 131 |
|---|---|
Fastest flight time | 3h 20m |
Direct flights | Every day |
Airports in Illinois | 2 airports |
When did momondo last update prices for flights from Calgary Airport to Illinois?
Prices for flights from Calgary Airport to Illinois were last updated today.
How many operators does momondo search for flights from Calgary Airport to Illinois?
There are 5 operators available for flights from Calgary Airport to Illinois as of June 2025.
How old do you have to be to fly from Calgary Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Calgary Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Calgary to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Calgary to Illinois is Boeing 737-700, representing 37.04% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 19.04%, Airbus A319 at 12.98%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 9.75%.
Best airlines flying from Calgary to Illinois
Compare and see reviews for airlines that fly from Calgary to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 148 | Free Cancellation | Rating 7.1 9,537 reviews | |||
| PriceFrom C$ 169 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom C$ 176 | Free Cancellation | Rating 7.2 2,868 reviews | |||
| PriceFrom C$ 197 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom C$ 248 | Free Cancellation | Rating 7.4 8,790 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Calgary to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Calgary to Illinois . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Calgary to Illinois with flexible booking policies on momondo?
momondo does allow users to show only those flights to Illinois from Calgary which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Calgary to Illinois?
Once all potential Calgary to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Calgary to Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Calgary to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.