What is the cheapest airline that flies from Calgary to Illinois?

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

How many flights depart from Calgary to Illinois on average per day?

As of May 2026, 7 flights take off from Calgary and land in Illinois each day. The most common flight departure time for this route is 12:00PM, with 100% of daily flights taking off in the afternoon.

How many flights depart from Calgary to Illinois on average per week?

As of May 2026, 52 flights take off from Calgary and land in Illinois each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

What airlines fly to Illinois?

WestJet, United Airlines and American 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 44% 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.

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 May 2026, 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.

$139 Cheap Flights from Calgary to Illinois in 2026

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Find the cheapest flights from Calgary to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:00 pm - 4:40 pm

YYC

ORD

3h 40mnonstop

5:30 pm - 8:25 pm

ORD

YYC

3h 55mnonstop

$171WestJet

Mon, May 18 - Sun, May 24

12:00 pm - 4:40 pm

YYC

ORD

3h 40mnonstop

5:30 pm - 8:25 pm

ORD

YYC

3h 55mnonstop

$173WestJet

Wed, May 20 - Tue, May 26

12:00 pm - 4:40 pm

YYC

ORD

3h 40mnonstop

5:30 pm - 8:25 pm

ORD

YYC

3h 55mnonstop

$174WestJet

Mon, May 18 - Sun, May 24

6:30 am - 2:55 pm

YYC

ORD

7h 25m

1 stop

5:30 pm - 8:25 pm

ORD

YYC

3h 55mnonstop

$195Multiple Airlines

Thu, May 21 - Sat, May 30

6:30 am - 2:55 pm

YYC

ORD

7h 25m

1 stop

5:30 pm - 8:25 pm

ORD

YYC

3h 55mnonstop

$217Multiple Airlines

Sat, May 23 - Sun, May 24

2:00 pm - 12:36 am

YYC

STL

9h 36m

1 stop

2:15 pm - 11:13 pm

STL

YYC

9h 58m

1 stop

$376Delta

Fri, Oct 23 - Sun, Oct 25

1:40 pm - 8:32 am

YYC

STL

17h 52m

1 stop

7:00 am - 11:43 pm

STL

YYC

17h 43m

1 stop

$380American Airlines

Fri, May 22 - Mon, May 25

9:30 am - 4:31 pm

YYC

STL

6h 01m

1 stop

1:36 pm - 6:30 pm

STL

YYC

5h 54m

1 stop

$382United Airlines

Tue, Aug 25 - Wed, Aug 26

1:40 pm - 8:32 am

YYC

STL

17h 52m

1 stop

2:36 pm - 11:43 pm

STL

YYC

10h 07m

1 stop

$383American Airlines

Fri, May 22 - Mon, May 25

7:00 am - 4:15 pm

YYC

MDW

8h 15m

1 stop

1:00 pm - 8:05 pm

MDW

YYC

8h 05m

1 stop

$405Delta

Wed, Aug 5 - Mon, Aug 10

American Airlines flights from Calgary to Illinois

Our best American Airlines deals on Calgary to Illinois flight tickets

American Airlines

Sep 4

YYC7:00 amCalgary

3h 35m

ORD11:35 amChicago O'Hare Intl

Sep 6

ORD8:46 pmChicago O'Hare Intl

3h 43m

YYC11:29 pmCalgary

$251

American Airlines

May 28

YYC6:45 amCalgary

23h 47m

1 stop

ORD7:32 amChicago O'Hare Intl

Jun 1

ORD8:55 pmChicago O'Hare Intl

3h 48m

YYC11:43 pmCalgary

$260

American Airlines

May 22

YYC6:15 amCalgary

3h 30m

ORD10:45 amChicago O'Hare Intl

Jun 2

ORD8:55 pmChicago O'Hare Intl

3h 48m

YYC11:43 pmCalgary

$267

Delta flights from Calgary to Illinois

Our best Delta deals on Calgary to Illinois flight tickets

Delta

May 20

YYC7:45 amCalgary

10h 05m

1 stop

ORD6:50 pmChicago O'Hare Intl

May 26

ORD12:30 pmChicago O'Hare Intl

9h 00m

1 stop

YYC8:30 pmCalgary

$231

Delta

May 20

YYC7:45 amCalgary

10h 05m

1 stop

ORD6:50 pmChicago O'Hare Intl

May 26

ORD12:30 pmChicago O'Hare Intl

9h 00m

1 stop

YYC8:30 pmCalgary

$242

Delta

Aug 5

YYC7:45 amCalgary

10h 12m

1 stop

ORD6:57 pmChicago O'Hare Intl

Aug 11

ORD1:55 pmChicago O'Hare Intl

10h 11m

1 stop

YYC11:06 pmCalgary

$248

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 5/18

12:00 pm-4:40 pm

Nonstop3h 40m

Chicago O'Hare Intl

Sun 5/24

5:30 pm-8:25 pm

Nonstop3h 55m

$171

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 5/20

12:00 pm-4:40 pm

Nonstop3h 40m

Chicago O'Hare Intl

Tue 5/26

5:30 pm-8:25 pm

Nonstop3h 55m

$173

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 5/18

12:00 pm-4:40 pm

Nonstop3h 40m

Chicago O'Hare Intl

Sun 5/24

5:30 pm-8:25 pm

Nonstop3h 55m

$174

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 5/21

6:30 am-2:55 pm

1 stop7h 25m

Chicago O'Hare Intl

Sat 5/30

5:30 pm-8:25 pm

Nonstop3h 55m

$195

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 5/23

6:30 am-2:55 pm

1 stop7h 25m

Chicago O'Hare Intl

Sun 5/24

5:30 pm-8:25 pm

Nonstop3h 55m

$217

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 10/23

2:00 pm-12:36 am

1 stop9h 36m

Lambert-St Louis

Sun 10/25

2:15 pm-11:13 pm

1 stop9h 58m

$376

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/22

1:40 pm-8:32 am

1 stop17h 52m

Lambert-St Louis

Mon 5/25

7:00 am-11:43 pm

1 stop17h 43m

$380

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 8/25

9:30 am-4:31 pm

1 stop6h 01m

Lambert-St Louis

Wed 8/26

1:36 pm-6:30 pm

1 stop5h 54m

$382

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 5/22

1:40 pm-8:32 am

1 stop17h 52m

Lambert-St Louis

Mon 5/25

2:36 pm-11:43 pm

1 stop10h 07m

$383

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Wed 8/5

7:00 am-4:15 pm

1 stop8h 15m

Chicago Midway

Mon 8/10

1:00 pm-8:05 pm

1 stop8h 05m

$405

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Calgary is in March. Flight prices, which tend to average around $62, 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 March, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $64.

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 $292. Flights from Calgary to Illinois on a Monday will generally be more expensive and average around $484. 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 morning. Flights from Calgary to Illinois during this time can be as low as $358. Flights at noon are often more expensive with an average ticket price of $876.

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 from Calgary to Illinois?

You are more likely to see cheaper flights to Illinois from Calgary when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $282 when searching 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 $217 on momondo.

Can stopping save me money on Calgary to Illinois flights?

No. A direct flight is the cheapest option for a flight between Calgary to Illinois.

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	$178
Fastest flight time	3h 25m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Calgary in the past 72 hours is $178. The best round-trip flight deal from Calgary to Illinois found on momondo in the last 72 hours is $278.

The fastest flight from Calgary to Illinois takes 3h 25m

Direct flights go from Calgary to Illinois every day.

There are 98 airports in Illinois. From Calgary there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying 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 May 2026, 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 737-800, representing 23.80% of all bookings. The subsequent popular models are Boeing 737-700 Passenger/BBJ1 (winglets) at 18.65%, Boeing 737-700 at 15.89%, and Boeing 737 MAX 8 at 11.41%.

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
Air Canada	PriceFrom $109	Free Cancellation	Rating 7.1 10,998 reviews	Search Air Canada flights
United Airlines	PriceFrom $135	Free Cancellation	Rating 7.4 9,683 reviews	Search United Airlines flights
WestJet	PriceFrom $137	Free Cancellation	Rating 7.2 3,331 reviews	Search WestJet flights
American Airlines	PriceFrom $208	Free Cancellation	Rating 7.1 11,668 reviews	Search American Airlines flights

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.

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Popular cities in Illinois

Flights to New Yorkfrom $72

Flights to Los Angelesfrom $66

Flights to Orlandofrom $53

Flights to Miamifrom $59

Flights to Chicagofrom $56

Flights to San Franciscofrom $73

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $92

Flights to Atlantafrom $55

Flights to Dallasfrom $76

Flights to Fort Lauderdalefrom $56

Cheap flights from Calgary to Illinois from $139

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 5/30. 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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American Airlines flights from Calgary to Illinois

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How to get the cheapest flight ticket from Calgary to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Calgary to Illinois flight route?

How far in advance should I book a flight from Calgary to Illinois?

Can stopping save me money on Calgary to Illinois flights?

What is the cheapest airline that flies from Calgary to Illinois?

What airlines fly to Illinois?

How many flights depart from Calgary to Illinois on average per day?

How many flights depart from Calgary to Illinois on average per week?

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

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Calgary to Illinois

Best airlines flying from Calgary to Illinois

Compare and see reviews for airlines that fly from Calgary to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

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