Cheap flights from Calgary to Illinois from $117
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 5/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Calgary to Illinois
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Delta flights from Calgary to Illinois
Our best Delta deals on Calgary to Illinois flight tickets
American Airlines flights from Calgary to Illinois
Our best American Airlines deals on Calgary to Illinois flight tickets
See travel insights to Illinois from
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?
The cheapest month to fly to Illinois from Calgary is in May. Flight prices, which tend to average around $194, 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 May, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $198.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Calgary to Illinois is on a Sunday when prices can be found for as low as $260. Flights from Calgary to Illinois on a Thursday will generally be more expensive and average around $409. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
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 evening. Flights from Calgary to Illinois during this time can be as low as $215. Flights at noon are often more expensive with an average ticket price of $395.
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 25 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $300 when searching 25 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 $201 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?
Air Canada, WestJet, and American Airlines are the most popular carriers operating from Calgary to Illinois
What airlines fly to Illinois?
WestJet, United Airlines and Air Canada 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 36% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 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?
As of April 2025, 4 flights take off from Calgary and land in Illinois each day. The most common flight departure time for this route is 12:00PM, with 95% of daily flights taking off in the afternoon.
How many flights depart from Calgary to Illinois on average per week?
As of April 2025, 30 flights take off from Calgary and land in Illinois each week. The most common flight departure day for this route is Wed, with 20% of weekly flights taking off 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
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?
As of April 2025, there are 4 operators available to choose from for flights from Calgary Airport to Illinois.
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 travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
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 38.95% of all bookings. The subsequent popular models are Airbus A319 at 17.43%, Boeing 737-800 at 9.71%, and Boeing 737 MAX 8 at 8.88%.
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 $123 | Free Cancellation | Rating 7.0 9,245 reviews | |||
| PriceFrom $139 | Free Cancellation | Rating 7.2 2,826 reviews | |||
| PriceFrom $205 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $239 | Free Cancellation | Rating 7.4 8,696 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Calgary to Illinois?
It is quick and easy to find Calgary to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.
Can I find flights from Calgary to Illinois with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Illinois from Calgary with this policy.
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?
Of course. momondo tracks the price of Calgary to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.