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Cheap flights from Calgary to Illinois from C$ 158

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — ORD
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Calgary to Illinois

Enter your travel dates to find the best prices.

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 16 March 2026.

Thu 30/412:00 p.m.
YYC
-
ORD
Nonstop3h 40m
WestJet
Thu 7/55:30 p.m.
ORD
-
YYC
Nonstop3h 55m
WestJet
Deal found 11/3C$ 268
Sun 26/412:00 p.m.
YYC
-
ORD
Nonstop3h 40m
WestJet
Thu 30/45:30 p.m.
ORD
-
YYC
Nonstop3h 55m
WestJet
Deal found 13/3C$ 289
Mon 20/49:00 a.m.
YYC
-
ORD
Nonstop3h 35m
WestJet
Mon 27/45:30 p.m.
ORD
-
YYC
Nonstop3h 55m
WestJet
Deal found 13/3C$ 294
Sat 23/512:00 p.m.
YYC
-
ORD
Nonstop3h 40m
WestJet
Sun 31/55:30 p.m.
ORD
-
YYC
Nonstop3h 55m
WestJet
Deal found 12/3C$ 303
Thu 30/412:00 p.m.
YYC
-
ORD
Nonstop3h 40m
WestJet
Sun 3/55:30 p.m.
ORD
-
YYC
Nonstop3h 55m
WestJet
Deal found 13/3C$ 305
Fri 17/41:27 p.m.
YYC
-
ORD
1 stop10h 03m
United Airlines
Tue 21/48:42 a.m.
ORD
-
YYC
Nonstop3h 50m
United Airlines
Deal found 12/3C$ 311
Thu 30/412:00 p.m.
YYC
-
ORD
Nonstop3h 40m
WestJet
Mon 4/55:30 p.m.
ORD
-
YYC
Nonstop3h 55m
WestJet
Deal found 11/3C$ 317
Fri 17/46:00 a.m.
YYC
-
ORD
1 stop14h 20m
United Airlines
Mon 20/410:04 p.m.
ORD
-
YYC
1 stop16h 49m
United Airlines
Deal found 12/3C$ 325
Fri 17/45:35 a.m.
YYC
-
ORD
1 stop8h 40m
Air Canada
Tue 21/44:15 p.m.
ORD
-
YYC
1 stop9h 08m
Air Canada
Deal found 12/3C$ 327
Mon 13/412:30 a.m.
YYC
-
STL
1 stop29h 20m
Multiple Airlines
Sat 18/48:23 p.m.
STL
-
YYC
1 stop23h 46m
Multiple Airlines
Deal found 11/3C$ 427
Mon 27/47:00 a.m.
YYC
-
MDW
1 stop14h 19m
Multiple Airlines
Wed 29/46:10 a.m.
MDW
-
YYC
1 stop12h 00m
Multiple Airlines
Deal found 14/3C$ 443
Sat 25/412:30 a.m.
YYC
-
MDW
1 stop8h 28m
Multiple Airlines
Wed 29/46:10 a.m.
MDW
-
YYC
1 stop12h 00m
Multiple Airlines
Deal found 14/3C$ 461

Find flight deals from Calgary to Illinois

Keep the following information in mind while searching for Calgary to Illinois flight deals. Data was last updated 16 March 2026.

Round-trip from

C$ 268

One-way from

C$ 158

Popular in

March

Cheapest in

November

Average price

C$ 499

Good round-trip deal

C$ 350 or less

Good one-way deal

C$ 215 or less
WestJet
  • WestJet
  • 30/4-7/5
  • Nonstop
  • 7h 35m total
  • Calgary to Illinois
Search Deals
WestJet
  • WestJet
  • 10/5
  • Nonstop
  • 3h 40m total
  • Calgary to Illinois
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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

Cheapflights Fare Finder

 
Customize your flight search to find flights from Calgary to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 16 March 2026.
Use the filters below to find and compare flights from Calgary to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 17/4

1:27 p.m.-12:30 a.m.

1 stop10h 03m

Chicago O'Hare Intl

Tue 21/4

8:42 a.m.-11:32 a.m.

Nonstop3h 50m

C$ 311

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 11/4

6:30 a.m.-5:53 p.m.

1 stop10h 23m

Chicago O'Hare Intl

Tue 14/4

2:09 p.m.-11:00 p.m.

1 stop9h 51m

C$ 375

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 22/4

7:40 a.m.-7:52 p.m.

2 stops11h 12m

Chicago O'Hare Intl

Wed 29/4

2:09 p.m.-11:00 p.m.

1 stop9h 51m

C$ 388

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 1/4

7:40 a.m.-11:54 p.m.

2 stops15h 14m

Chicago O'Hare Intl

Wed 15/4

2:09 p.m.-11:00 p.m.

1 stop9h 51m

C$ 396

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 7/4

6:30 a.m.-8:23 p.m.

2 stops12h 53m

Chicago O'Hare Intl

Thu 9/4

1:19 p.m.-11:02 p.m.

1 stop10h 43m

C$ 403

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 28/3

7:40 a.m.-7:49 p.m.

2 stops11h 09m

Chicago O'Hare Intl

Fri 10/4

1:19 p.m.-11:02 p.m.

1 stop10h 43m

C$ 403
Quickest round-trip

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 23/5

1:27 p.m.-8:30 p.m.

1 stop6h 03m

Chicago O'Hare Intl

Sun 31/5

7:42 p.m.-10:37 p.m.

Nonstop3h 55m

C$ 405

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 19/6

7:15 a.m.-6:01 p.m.

1 stop9h 46m

Chicago O'Hare Intl

Sun 21/6

1:55 p.m.-11:06 p.m.

1 stop10h 11m

C$ 440

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 30/4

12:00 p.m.-4:40 p.m.

Nonstop3h 40m

Chicago O'Hare Intl

Thu 7/5

2:11 p.m.-10:57 p.m.

1 stop9h 46m

C$ 465

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Sat 25/4

6:40 a.m.-1:32 p.m.

1 stop5h 52m

Chicago Midway

Sat 2/5

9:27 a.m.-8:40 p.m.

2 stops12h 13m

C$ 471

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 51 resultsSorted by cheapest first
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6

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.
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

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

Currently, April is the cheapest month in which you can book a flight from Calgary to Illinois (average of C$ 125). Flying from Calgary to Illinois in July is currently the most expensive (average of C$ 217). 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?

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 16 March 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 16 March 2026.

The most flights from YYC to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 16 March 2026.
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
7.9
Good
8,292 reviews
Check prices

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,292 reviews
Delta
7.9
Good
8,292 reviews
Check prices

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,429 reviews
Delta
7.9
Good
8,292 reviews
Check prices

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,295 reviews
Delta
7.9
Good
8,292 reviews
Check prices

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,466 reviews
Delta
7.9
Good
8,292 reviews
Check prices

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,805 reviews
Delta
7.9
Good
8,292 reviews
Check prices

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Calgary to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 10h 03m. Fly via United Airlines or Delta 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$ 159 and C$ 161, respectively.

  • What are the most popular routes from Calgary to Illinois?

    While some choose either Calgary - Chicago Midway or Calgary - Decatur Arpt, 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: Scandinavian Airlines (83%), WestJet (82%), Delta( 76%).

  • 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$ 506, our data indicates the cheapest price to be C$ 143. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 340.

  • 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, April is the cheapest month in which you can book a flight from Calgary to Illinois (average of C$ 125). Flying from Calgary to Illinois in July is currently the most expensive (average of C$ 217). 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

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Alternative routes for Calgary to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Calgary to Illinois

Discover the top 5 airlines that operate flights from Calgary to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 16 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 120AverageC$ 288FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 147AverageC$ 367FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 167AverageC$ 376FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 170AverageC$ 351FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 176AverageC$ 330FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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