How long is the flight from Calgary to Illinois?

There are many flights that can get you from Calgary to Illinois in 2h 20m. Fly via Delta, United Airlines, or Air Canada to get the fastest option. There are 2223 km between Calgary and Illinois. This flight may include one or multiple stops.

What are the cheapest airlines to fly from Calgary to Illinois one-way?

C$ 128 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and American Airlines, with prices starting from C$ 150 and C$ 163, respectively.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular routes from Calgary to Illinois?

While some choose either Calgary - Chicago Midway or Calgary - Lambert-St Louis, Calgary - Chicago O'Hare Intl is the most popular route from Calgary to Illinois.

What are the cheapest flights from Calgary to Illinois?

Looking for the cheapest flight from Calgary to Illinois? While on average our users pay C$ 639, our data indicates the cheapest price to be C$ 262. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 319.

What are the most reliable airlines from Calgary to Illinois?

Before booking your flight to Illinois from Calgary, check out the most reliable airlines to get you to your destination on time: Avianca (85%), Porter Airlines (83%), Qatar Airways( 83%).

What are the most popular airlines that fly from Calgary to Illinois?

Before booking your flight from Calgary to Illinois check out the most popular airlines for this route: WestJet, United Airlines or American Airlines.

What airport do you fly from for flights from Calgary to Illinois?

If you book a flight to Illinois from Calgary, you will be flying from Calgary, which is the city’s only airport. Calgary (YYC) is located 9.3 km from the centre of Calgary.

Can I find deals for flights from Calgary to Illinois that include hotel bookings?

Yes. In addition to deals on Calgary to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Calgary to Illinois?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Calgary to Illinois.

Can I find deals for business class flights from Calgary to Illinois?

Yes. Cheapflights offers flight deals from Calgary to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 218+ Cheap Flights from Calgary to Illinois

Cheap flight deals from Calgary to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Calgary to Illinois
Explore the most affordable flight options available from Calgary to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Fri 30/106:00 a.m. -

1 stop16h 59m

Thu 5/118:40 a.m. -

Nonstop4h 55m

Deal found 9/9C$ 351

Fri 23/101:51 p.m. -

Nonstop3h 45m

Fri 30/1010:00 a.m. -

Nonstop3h 51m

Deal found 8/9C$ 352

Wed 7/106:00 a.m. -

1 stop16h 59m

Sun 11/106:00 a.m. -

1 stop16h 48m

Deal found 11/9C$ 355

Fri 30/1012:37 p.m. -

Nonstop3h 33m

Thu 5/118:40 a.m. -

Nonstop4h 55m

Deal found 11/9C$ 356

Sat 3/109:20 a.m. -

1 stop6h 15m

Tue 6/108:40 a.m. -

Nonstop3h 48m

Deal found 8/9C$ 358

Sun 11/106:00 a.m. -

1 stop16h 59m

Fri 16/102:15 p.m. -

1 stop9h 42m

Deal found 8/9C$ 359

Wed 2/121:37 p.m. -

Nonstop2h 33m

Tue 8/121:55 p.m. -

1 stop11h 55m

Deal found 10/9C$ 361

Sat 3/106:35 a.m. -

2 stops13h 21m

Tue 6/102:03 p.m. -

1 stop10h 07m

Deal found 8/9C$ 363

Wed 28/106:35 a.m. -

2 stops10h 25m

Fri 30/1010:12 a.m. -

2 stops13h 58m

Deal found 11/9C$ 363

Thu 29/106:00 a.m. -

1 stop13h 05m

Tue 3/118:40 a.m. -

Nonstop4h 55m

Deal found 10/9C$ 365

Sat 31/106:35 a.m. -

2 stops9h 12m

Wed 4/111:27 p.m. -

2 stops11h 43m

Deal found 9/9C$ 365

Tue 17/111:37 p.m. -

Nonstop2h 33m

Mon 23/114:30 p.m. -

1 stop8h 36m

Deal found 10/9C$ 368

Best flights from Calgary to Illinois
Discover carefully curated flight deals from Calgary to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Fri 30/106:35 a.m. -

2 stops12h 55m

Mon 2/112:03 p.m. -

1 stop11h 07m

Deal found 10/9C$ 365

Fri 30/1012:37 p.m. -

Nonstop3h 33m

Thu 5/118:45 a.m. -

1 stop10h 09m

Deal found 11/9C$ 369

Wed 24/21:30 p.m. -

Nonstop2h 20m

Mon 1/39:00 a.m. -

Nonstop4h 54m

Deal found 11/9C$ 395

Tue 13/107:40 p.m. -

1 stop17h 20m

Sun 1/114:05 p.m. -

1 stop9h 01m

Deal found 8/9C$ 556

Sat 14/118:45 a.m. -

1 stop6h 54m

Wed 18/1112:30 p.m. -

2 stops12h 47m

Deal found 8/9C$ 384

Mon 16/117:00 a.m. -

1 stop14h 46m

Thu 19/118:45 a.m. -

1 stop16h 21m

Deal found 8/9C$ 394

Mon 16/117:00 a.m. -

1 stop12h 05m

Fri 20/111:55 p.m. -

1 stop11h 11m

Deal found 8/9C$ 394

Thu 24/127:00 a.m. -

1 stop12h 00m

Thu 31/1210:00 p.m. -

1 stop18h 21m

Deal found 12/9C$ 462

Fri 30/107:45 a.m. -

2 stops13h 48m

Mon 2/1112:27 p.m. -

1 stop10h 13m

Deal found 12/9C$ 449

Fri 30/1012:37 p.m. -

Nonstop3h 33m

Mon 2/118:40 a.m. -

Nonstop4h 55m

Deal found 10/9C$ 504

Tue 27/107:45 a.m. -

2 stops13h 48m

Tue 10/1112:30 p.m. -

2 stops12h 47m

Deal found 9/9C$ 466

Tue 27/106:35 a.m. -

2 stops12h 55m

Tue 10/1112:38 p.m. -

2 stops12h 39m

Deal found 9/9C$ 466

Tue 20/101:27 p.m. -

1 stop6h 09m

Wed 21/106:00 a.m. -

1 stop6h 28m

Deal found 12/9C$ 567

Sun 27/96:35 a.m. -

1 stop9h 24m

Wed 30/92:05 p.m. -

1 stop10h 01m

Deal found 11/9C$ 515

Sat 26/96:00 a.m. -

1 stop16h 44m

Tue 29/94:39 p.m. -

1 stop6h 09m

Deal found 12/9C$ 648

Sat 26/96:35 a.m. -

1 stop9h 12m

Tue 29/96:15 a.m. -

1 stop15h 27m

Deal found 8/9C$ 535

Tue 20/106:35 a.m. -

1 stop5h 57m

Wed 21/102:22 p.m. -

1 stop9h 48m

Deal found 8/9C$ 544

Wed 27/110:39 a.m. -

2 stops21h 07m

Sun 31/19:42 a.m. -

2 stops14h 15m

Deal found 11/9C$ 667

Mon 19/1011:35 p.m. -

2 stops16h 12m

Fri 23/1012:27 p.m. -

2 stops11h 43m

Deal found 11/9C$ 544

Fri 30/107:45 a.m. -

2 stops13h 48m

Thu 5/1112:27 p.m. -

2 stops12h 43m

Deal found 11/9C$ 551

Mon 5/1012:20 a.m. -

1 stop10h 34m

Wed 7/101:27 p.m. -

1 stop7h 48m

Deal found 8/9C$ 555

Wed 28/106:35 a.m. -

2 stops10h 25m

Fri 30/1012:27 p.m. -

1 stop9h 13m

Deal found 11/9C$ 588

Find flight deals from Calgary to Illinois

Round-trip from	C$ 351
One-way from	C$ 218
Popular in	June
Cheapest in	January
Average price	C$ 429
Good round-trip deal	C$ 517 or less
Good one-way deal	C$ 316 or less

Lufthansa
30/10-5/11
1 total stop
21h 54m total
Calgary to Illinois

Search Deals

Air Canada
20/10-31/12
1 total stop
8h 17m total
Calgary to Illinois

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (C$ 49 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from Calgary to Illinois.

Search Deals

Price to beat on a one-way flight from Calgary to Illinois.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Tue 6/10

6:35 a.m.-6:10 p.m.

1 stop10h 35m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 221

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Wed 7/10

6:00 a.m.-10:46 p.m.

1 stop15h 46m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 221

CalgaryChicago

YYC Calgary - MDW Chicago Midway

YYCMDW

Calgary

Sat 3/10

6:35 a.m.-6:22 p.m.

2 stops10h 47m

Chicago Midway

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 221

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Fri 5/3

7:15 a.m.-7:37 p.m.

2 stops12h 22m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 241

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Wed 10/3

7:15 a.m.-7:37 p.m.

2 stops12h 22m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 241

CalgaryChicago

YYC Calgary - MDW Chicago Midway

YYCMDW

Calgary

Wed 7/10

7:45 a.m.-4:47 p.m.

1 stop8h 02m

Chicago Midway

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 261

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Sat 19/9

6:35 a.m.-8:56 p.m.

2 stops13h 21m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 266

Quickest round-trip

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Fri 12/3

1:30 p.m.-4:10 p.m.

Nonstop2h 40m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 268

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Mon 8/3

7:15 a.m.-7:37 p.m.

2 stops12h 22m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 272

CalgaryChicago

YYC Calgary - ORD Chicago O'Hare Intl

YYCORD

Calgary

Sat 19/9

9:30 a.m.-10:45 p.m.

1 stop12h 15m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 277

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 45 resultsSorted by cheapest first

...

Best time to book a flight from Calgary to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Calgary with our price prediction graph.

YYC-ORD

YYC-STL

YYC-MDW

YYC-DEC

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Calgary to Illinois

YYC-USIL

YYC-ORD

YYC-STL

YYC-MDW

YYC-DEC

What is the cheapest month to book a flight from Calgary to Illinois?

Currently, January is the cheapest month in which you can book a flight from Calgary to Illinois (average of C$ 351). Flying from Calgary to Illinois in June is currently the most expensive (average of C$ 510). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YYC to IL?

When flying from Calgary to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Calgary to Illinois

The most flights from YYC to USIL are scheduled on a Friday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

How much does it cost to fly round-trip from Calgary to Illinois?

Airfare is below average for this route at the moment.

Calgary to Illinois flights typically cost between C$ 393 and C$ 515 in October.
The cheapest round-trip price found within the last 5 days was C$ 351 on Lufthansa (30 Oct-5 Nov).

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

The best time to book flights from Calgary to Illinois is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Delta,United Airlines, andWestJet from Calgary to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.8

Good

8,568 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

Delta

7.8

Good

8,568 reviews

Delta

7.8

Good

8,568 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

United Airlines

7.4

Good

10,211 reviews

Delta

7.8

Good

8,568 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

WestJet

7.2

Good

3,444 reviews

Delta

7.8

Good

8,568 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

American Airlines

7.1

Good

12,049 reviews

Delta

7.8

Good

8,568 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

Air Canada

7.1

Good

11,619 reviews

Delta

7.8

Good

8,568 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

Related info for your journey

What airport do you fly from for flights from Calgary to Illinois?
If you book a flight to Illinois from Calgary, you will be flying from Calgary, which is the city’s only airport. Calgary (YYC) is located 9.3 km from the centre of Calgary.
How long is the flight from Calgary to Illinois?
There are many flights that can get you from Calgary to Illinois in 2h 20m. Fly via Delta, United Airlines, or Air Canada to get the fastest option. There are 2223 km between Calgary and Illinois. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Calgary to Illinois one-way?
C$ 128 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and American Airlines, with prices starting from C$ 150 and C$ 163, respectively.
What are the most popular routes from Calgary to Illinois?
While some choose either Calgary - Chicago Midway or Calgary - Lambert-St Louis, Calgary - Chicago O'Hare Intl is the most popular route from Calgary to Illinois.
What are the most reliable airlines from Calgary to Illinois?
Before booking your flight to Illinois from Calgary, check out the most reliable airlines to get you to your destination on time: Avianca (85%), Porter Airlines (83%), Qatar Airways( 83%).
What are the cheapest flights from Calgary to Illinois?
Looking for the cheapest flight from Calgary to Illinois? While on average our users pay C$ 639, our data indicates the cheapest price to be C$ 262. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 319.
Can I find deals for flights from Calgary to Illinois that include hotel bookings?
Yes. In addition to deals on Calgary to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Calgary to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Calgary to Illinois.
Can I find deals for business class flights from Calgary to Illinois?
Yes. Cheapflights offers flight deals from Calgary to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Calgary to Illinois?
Currently, January is the cheapest month in which you can book a flight from Calgary to Illinois (average of C$ 351). Flying from Calgary to Illinois in June is currently the most expensive (average of C$ 510). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Calgary to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 121	AverageC$ 430	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Delta	CheapestC$ 142	AverageC$ 383	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
United Airlines	CheapestC$ 187	AverageC$ 525	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
WestJet	CheapestC$ 192	AverageC$ 366	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
American Airlines	CheapestC$ 196	AverageC$ 449	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Calgary to Illinois?

When you search for this flight from Calgary to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Calgary to Illinois?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Calgary.

Can Cheapflights find flights from Calgary to Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Calgary to Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Calgary to Illinois become cheaper?

Of course! You can now track prices for flights from Calgary to Illinois and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Calgary to Illinois from C$ 218

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Calgary to Illinois

Cheapest flights from Calgary to IllinoisExplore the most affordable flight options available from Calgary to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Explore the most affordable flight options available from Calgary to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Best flights from Calgary to IllinoisDiscover carefully curated flight deals from Calgary to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Discover carefully curated flight deals from Calgary to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Direct flights from Calgary to IllinoisExplore direct flight options from Calgary to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Explore direct flight options from Calgary to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Last-minute flights from Calgary to IllinoisDiscover last-minute flight deals from Calgary to Illinois. Data last updated 13 September 2026 and is based on user searches.

Discover last-minute flight deals from Calgary to Illinois. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Calgary to IllinoisSearch for one-way flight options from Calgary to Illinois. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Search for one-way flight options from Calgary to Illinois. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Find flight deals from Calgary to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

Best time to book a flight from Calgary to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Calgary with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from Calgary to Illinois?

What is the cheapest time of day to fly from YYC to IL?

Find hourly flight availability from Calgary to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 September 2026.

When flying from Calgary to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Calgary to Illinois

Explore weekly flight availability from Calgary to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 13 September 2026.

The most flights from YYC to USIL are scheduled on a Friday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

How much does it cost to fly round-trip from Calgary to Illinois?

Airfare is below average for this route at the moment.

Calgary to Illinois flights typically cost between C$ 393 and C$ 515 in October.The cheapest round-trip price found within the last 5 days was C$ 351 on Lufthansa (30 Oct-5 Nov).

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

The best time to book flights from Calgary to Illinois is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Delta,United Airlines, andWestJet from Calgary to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from Calgary to Illinois?

How long is the flight from Calgary to Illinois?

What are the cheapest airlines to fly from Calgary to Illinois one-way?

What are the most popular routes from Calgary to Illinois?

What are the most reliable airlines from Calgary to Illinois?

What are the cheapest flights from Calgary to Illinois?

Can I find deals for flights from Calgary to Illinois that include hotel bookings?

How can I find direct flights from Calgary to Illinois?

Can I find deals for business class flights from Calgary to Illinois?

What is the cheapest month to book a flight from Calgary to Illinois?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Calgary to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Calgary to Illinois by cabin class

Find flights from Calgary to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Calgary and Illinois flights

Browse other Calgary and Illinois flight options. Last updated on 13 September 2026.

Popular flight searches

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Calgary to Illinois flights

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Top 5 airlines flying from Calgary to Illinois

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Cheapest flights from Calgary to Illinois
Explore the most affordable flight options available from Calgary to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Best flights from Calgary to Illinois
Discover carefully curated flight deals from Calgary to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Direct flights from Calgary to Illinois
Explore direct flight options from Calgary to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Last-minute flights from Calgary to Illinois
Discover last-minute flight deals from Calgary to Illinois. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Calgary to Illinois
Search for one-way flight options from Calgary to Illinois. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Calgary to Illinois flights typically cost between C$ 393 and C$ 515 in October.
The cheapest round-trip price found within the last 5 days was C$ 351 on Lufthansa (30 Oct-5 Nov).