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

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

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

12 flights are operational daily from Calgary to Illinois as of September 2025. The most popular departure time for this route is 12:00p.m., with 56% of flights per day taking off in the afternoon.

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 40% 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 week?

The number of flights available between Calgary and Illinois is 84 per week as of September 2025. The most frequent departure day is Sun, with 18% of weekly flights leaving on this day.

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 September 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.

C$ 156 Cheap Flights from Calgary to Illinois in 2025/26

1 adult

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Find the cheapest flights from Calgary to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

12:15 p.m. - 4:43 p.m.YYC-ORD

3h 28mdirect

5:30 p.m. - 8:19 p.m.ORD-YYC

3h 49mdirect

C$ 216WestJet

Find Deal

Fri, 3 Oct - Sun, 5 Oct

9:00 a.m. - 1:35 p.m.YYC-ORD

3h 35mdirect

8:45 a.m. - 11:35 a.m.ORD-YYC

3h 50mdirect

C$ 223WestJet

Find Deal

Sun, 26 Oct - Sat, 1 Nov

1:29 p.m. - 5:54 p.m.YYC-ORD

3h 25mdirect

8:45 p.m. - 11:44 a.m.ORD-YYC

15h 59m1 stop

C$ 233American Airlines

Find Deal

Tue, 28 Oct - Tue, 4 Nov

12:37 p.m. - 5:08 p.m.YYC-ORD

3h 31mdirect

1:55 p.m. - 9:53 p.m.ORD-YYC

8h 58m1 stop

C$ 238United Airlines

Find Deal

Mon, 2 Feb - Mon, 9 Feb

12:45 a.m. - 11:18 a.m.YYC-ORD

9h 33m1 stop

10:00 a.m. - 6:54 p.m.ORD-YYC

9h 54m1 stop

C$ 244Air Canada

Find Deal

Mon, 27 Oct - Tue, 4 Nov

6:15 a.m. - 11:59 p.m.YYC-ORD

16h 44m1 stop

7:10 a.m. - 9:53 p.m.ORD-YYC

15h 43m1 stop

C$ 246United Airlines

Find Deal

Thu, 11 Dec - Mon, 15 Dec

5:45 a.m. - 3:10 p.m.YYC-ORD

8h 25m1 stop

2:00 p.m. - 8:39 p.m.ORD-YYC

7h 39m1 stop

C$ 252Air Canada

Find Deal

Tue, 28 Oct - Tue, 4 Nov

1:29 p.m. - 5:54 p.m.YYC-ORD

3h 25mdirect

5:00 a.m. - 11:59 a.m.ORD-YYC

7h 59m1 stop

C$ 269American Airlines

Find Deal

Sun, 26 Oct - Sat, 1 Nov

7:35 a.m. - 6:45 p.m.YYC-ORD

10h 10m1 stop

1:38 p.m. - 11:13 p.m.ORD-YYC

10h 35m1 stop

C$ 309Delta

Find Deal

Thu, 11 Dec - Mon, 15 Dec

7:45 a.m. - 6:41 p.m.YYC-ORD

9h 56m1 stop

2:10 p.m. - 11:02 p.m.ORD-YYC

9h 52m1 stop

C$ 336Delta

Find Deal

Fri, 17 Oct - Sun, 19 Oct

WestJet flights from Calgary to Illinois

Our best WestJet deals on Calgary to Illinois flight tickets

WestJet

3 Oct

YYC12:15 p.m.Calgary

3h 28m

ORD4:43 p.m.Chicago O'Hare Intl

5 Oct

ORD5:30 p.m.Chicago O'Hare Intl

3h 49m

YYC8:19 p.m.Calgary

C$ 216

Find similar

WestJet

26 Oct

YYC9:00 a.m.Calgary

3h 35m

ORD1:35 p.m.Chicago O'Hare Intl

1 Nov

ORD8:45 a.m.Chicago O'Hare Intl

3h 50m

YYC11:35 a.m.Calgary

C$ 223

Find similar

WestJet

2 Jan

YYC9:00 a.m.Calgary

3h 35m

ORD1:35 p.m.Chicago O'Hare Intl

5 Jan

ORD2:20 p.m.Chicago O'Hare Intl

3h 55m

YYC5:15 p.m.Calgary

C$ 241

Find similar

American Airlines flights from Calgary to Illinois

Our best American Airlines deals on Calgary to Illinois flight tickets

American Airlines

28 Oct

YYC1:29 p.m.Calgary

3h 25m

ORD5:54 p.m.Chicago O'Hare Intl

4 Nov

ORD8:45 p.m.Chicago O'Hare Intl

15h 59m

1 stop

YYC11:44 a.m.Calgary

C$ 233

Find similar

American Airlines

26 Oct

YYC1:29 p.m.Calgary

3h 25m

ORD5:54 p.m.Chicago O'Hare Intl

1 Nov

ORD5:00 a.m.Chicago O'Hare Intl

7h 59m

1 stop

YYC11:59 a.m.Calgary

C$ 269

Find similar

American Airlines

24 Oct

YYC12:54 p.m.Calgary

9h 48m

1 stop

ORD11:42 p.m.Chicago O'Hare Intl

26 Oct

ORD9:49 a.m.Chicago O'Hare Intl

3h 45m

YYC12:34 p.m.Calgary

C$ 340

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 3/10

12:15 p.m.-4:43 p.m.

Nonstop3h 28m

Chicago O'Hare Intl

Sun 5/10

5:30 p.m.-8:19 p.m.

Nonstop3h 49m

C$ 216

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sun 26/10

9:00 a.m.-1:35 p.m.

Nonstop3h 35m

Chicago O'Hare Intl

Sat 1/11

8:45 a.m.-11:35 a.m.

Nonstop3h 50m

C$ 223

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 28/10

1:29 p.m.-5:54 p.m.

Nonstop3h 25m

Chicago O'Hare Intl

Tue 4/11

8:45 p.m.-11:44 a.m.

1 stop15h 59m

C$ 233

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 2/2

12:37 p.m.-5:08 p.m.

Nonstop3h 31m

Chicago O'Hare Intl

Mon 9/2

1:55 p.m.-9:53 p.m.

1 stop8h 58m

C$ 238

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 27/10

12:45 a.m.-11:18 a.m.

1 stop9h 33m

Chicago O'Hare Intl

Tue 4/11

10:00 a.m.-6:54 p.m.

1 stop9h 54m

C$ 244

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 11/12

6:15 a.m.-11:59 p.m.

1 stop16h 44m

Chicago O'Hare Intl

Mon 15/12

7:10 a.m.-9:53 p.m.

1 stop15h 43m

C$ 246

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 28/10

5:45 a.m.-3:10 p.m.

1 stop8h 25m

Chicago O'Hare Intl

Tue 4/11

2:00 p.m.-8:39 p.m.

1 stop7h 39m

C$ 252

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sun 26/10

1:29 p.m.-5:54 p.m.

Nonstop3h 25m

Chicago O'Hare Intl

Sat 1/11

5:00 a.m.-11:59 a.m.

1 stop7h 59m

C$ 269

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 11/12

7:35 a.m.-6:45 p.m.

1 stop10h 10m

Chicago O'Hare Intl

Mon 15/12

1:38 p.m.-11:13 p.m.

1 stop10h 35m

C$ 309

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 17/10

7:45 a.m.-6:41 p.m.

1 stop9h 56m

Chicago O'Hare Intl

Sun 19/10

2:10 p.m.-11:02 p.m.

1 stop9h 52m

C$ 336

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?

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$ 264. 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$ 270.

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$ 688. 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 Sunday, with ticket prices averaging around C$ 1,010.

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$ 366. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,502 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 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 378 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 C$ 275 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.

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	C$ 289
Fastest flight time	3h 25m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from Calgary in the past 72 hours is C$ 289. The best round-trip flight deal from Calgary to Illinois found on momondo in the last 72 hours is C$ 474.

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

Direct flights go from Calgary to Illinois every day.

There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)

Search flight deals

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 September 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 32.70% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 16.99%, Boeing 737-800 Passenger/BBJ2 (winglets) at 14.91%, and Airbus A319 at 12.21%.

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 C$ 150	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
WestJet	PriceFrom C$ 177	Free Cancellation	Rating 7.2 3,091 reviews	Search WestJet flights
Delta	PriceFrom C$ 184	Free Cancellation	Rating 7.9 7,954 reviews	Search Delta flights
American Airlines	PriceFrom C$ 186	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom C$ 251	Free Cancellation	Rating 7.4 8,929 reviews	Search United Airlines flights

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.

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.

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Find better results for your trip to Illinois

Popular Cities in Illinois

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Flights to Honolulufrom C$ 274

Flights to Phoenixfrom C$ 194

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Flights to Chicagofrom C$ 203

Flights to Houstonfrom C$ 234

Cheap flights from Calgary to Illinois from C$ 156

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 7/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Calgary to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

WestJet flights from Calgary to Illinois

Our best WestJet 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

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Use the filters below to find and compare flights from Calgary to Illinois that are best for you.

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?

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?

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?

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.

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.

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

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

Which airlines fly to Illinois?

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

12 flights are operational daily from Calgary to Illinois as of September 2025. The most popular departure time for this route is 12:00p.m., with 56% 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 84 per week as of September 2025. The most frequent departure day is Sun, with 18% 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

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Calgary Airport to Illinois?

How many operators does momondo search for flights from Calgary Airport to Illinois?

How old do you have to be to fly from Calgary Airport to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model 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?

Why should I use momondo to find a flight deal from Calgary to Illinois?

Can I find flights from Calgary to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Calgary to Illinois?

I’m not ready to book a flight from Calgary to Illinois right now. Can momondo alert me if prices change?

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

Popular Cities in Illinois

Popular flights according to clicks in the last 7 days on momondo