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Cheap flights from Calgary to Illinois from C$ 139

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — ORD
26 Feb — 5 Mar1
1 adult

Cheap flight deals from Calgary to Illinois

Keep the following information in mind while searching for Calgary to Illinois flight deals. Data was last updated 21 February 2025.

Round-trip from

C$ 226

One-way from

C$ 139

Popular in

December

Cheapest in

February

Average price

C$ 284

Good round-trip deal

C$ 402 or less

Good one-way deal

C$ 245 or less
WestJet
  • WestJet
  • 27/2-2/3
  • Nonstop
  • 7h 17m total
  • Calgary to Illinois
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WestJet
  • WestJet
  • 1/5
  • Nonstop
  • 3h 29m total
  • Calgary to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Calgary to Illinois.
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Price to beat on a one-way flight from Calgary to Illinois.
Search Deals

Find flight deals from Calgary to Illinois

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 21 February 2025.

Thu 27/211:30 a.m.YYC - ORD
Nonstop3h 26mWestJet
Sun 2/34:45 p.m.ORD - YYC
Nonstop3h 51mWestJet
Deal found 19/2C$ 226
Mon 7/48:30 a.m.YYC - ORD
1 stop9h 24mAir Canada
Thu 10/410:53 a.m.ORD - YYC
1 stop10h 30mAir Canada
Deal found 19/2C$ 249
Thu 20/32:01 p.m.YYC - ORD
1 stop7h 44mUnited Airlines
Thu 27/35:00 a.m.ORD - YYC
1 stop10h 21mUnited Airlines
Deal found 20/2C$ 268
Sun 2/311:30 a.m.YYC - ORD
Nonstop3h 26mMultiple Airlines
Sun 9/35:00 a.m.ORD - YYC
1 stop10h 21mMultiple Airlines
Deal found 19/2C$ 298
Tue 13/57:15 a.m.YYC - ORD
1 stop9h 46mDelta
Sat 17/512:17 p.m.ORD - YYC
2 stops11h 50mDelta
Deal found 20/2C$ 312
Mon 3/36:35 a.m.YYC - MDW
1 stop10h 08mDelta
Wed 5/31:26 p.m.MDW - YYC
1 stop8h 27mDelta
Deal found 20/2C$ 312
Sat 15/33:45 p.m.YYC - MDW
1 stop12h 45mMultiple Airlines
Wed 19/39:25 a.m.MDW - YYC
1 stop8h 37mMultiple Airlines
Deal found 19/2C$ 413
Thu 20/21:32 p.m.YYC - ORD
Nonstop3h 31mAmerican Airlines
Sun 23/26:48 p.m.ORD - YYC
1 stop18h 02mAmerican Airlines
Deal found 19/2C$ 455
Sun 2/36:35 a.m.YYC - STL
1 stop9h 18mDelta
Sat 8/35:00 p.m.STL - YYC
1 stop7h 15mDelta
Deal found 20/2C$ 457
Thu 27/26:14 a.m.YYC - STL
1 stop9h 19mAir Canada
Tue 18/31:45 p.m.STL - YYC
1 stop8h 56mAir Canada
Deal found 20/2C$ 462
Tue 1/46:00 a.m.YYC - STL
2 stops9h 52mWestJet
Wed 16/411:23 a.m.STL - YYC
2 stops8h 42mWestJet
Deal found 20/2C$ 506
Sun 6/411:30 a.m.YYC - STL
2 stops31h 40mMultiple Airlines
Sun 13/412:15 p.m.STL - YYC
2 stops32h 21mMultiple Airlines
Deal found 20/2C$ 531

Find flights from Calgary to Illinois within your budget

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 21 February 2025.

Fly from

Calgary

Fly to

Illinois

Route

Depart

Return

Price

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 14/4

11:30 a.m.-3:56 p.m.

Nonstop3h 26m

Chicago O'Hare Intl

Sun 20/4

4:45 p.m.-7:36 p.m.

Nonstop3h 51m

C$ 226

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 7/4

8:30 a.m.-6:54 p.m.

1 stop9h 24m

Chicago O'Hare Intl

Thu 10/4

10:53 a.m.-8:23 p.m.

1 stop10h 30m

C$ 249

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 20/3

2:01 p.m.-10:45 p.m.

1 stop7h 44m

Chicago O'Hare Intl

Thu 27/3

5:00 a.m.-2:21 p.m.

1 stop10h 21m

C$ 268

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sun 2/3

11:30 a.m.-3:56 p.m.

Nonstop3h 26m

Chicago O'Hare Intl

Sun 9/3

5:00 a.m.-2:21 p.m.

1 stop10h 21m

C$ 298

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 13/5

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

1 stop9h 46m

Chicago O'Hare Intl

Sat 17/5

12:17 p.m.-11:07 p.m.

2 stops11h 50m

C$ 312

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Mon 3/3

6:35 a.m.-5:43 p.m.

1 stop10h 08m

Chicago Midway

Wed 5/3

1:26 p.m.-8:53 p.m.

1 stop8h 27m

C$ 312

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Sat 15/3

3:45 p.m.-5:30 a.m.

1 stop12h 45m

Chicago Midway

Wed 19/3

9:25 a.m.-5:02 p.m.

1 stop8h 37m

C$ 413

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 2/3

6:35 a.m.-4:53 p.m.

1 stop9h 18m

Lambert-St Louis

Sat 8/3

5:00 p.m.-11:15 p.m.

1 stop7h 15m

C$ 457

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 9/4

1:17 p.m.-5:49 p.m.

Nonstop3h 32m

Chicago O'Hare Intl

Sat 12/4

5:00 a.m.-11:45 a.m.

1 stop7h 45m

C$ 487

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 1/4

6:00 a.m.-4:52 p.m.

2 stops9h 52m

Lambert-St Louis

Wed 16/4

11:23 a.m.-7:05 p.m.

2 stops8h 42m

C$ 506

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Showing 1-10 of 28 results
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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.

Travel insights for flights from Calgary to Illinois

Get recent, data-driven insights about flights from Calgary to Illinois including ideal travel times, pricing trends, and more.

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$ 261). Flying from Calgary to Illinois in March is currently the most expensive (average of C$ 355). 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 21 February 2025.

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 21 February 2025.

The most flights from YYC to USIL are scheduled on a Thursday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

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.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

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).

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 21 February 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Porter Airlines from Calgary to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,692 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,220 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Porter Airlines
7.9
Good
276 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines
7.4
Good
8,766 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

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

    C$ 139 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 United Airlines, with prices starting from C$ 156 and C$ 172, 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: Air Canada (90%), Emirates (90%), United Airlines( 90%).

  • 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$ 1,595, our data indicates the cheapest price to be C$ 142. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 226.

  • 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$ 261). Flying from Calgary to Illinois in March is currently the most expensive (average of C$ 355). 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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Top 6 airlines flying from Calgary to Illinois

Discover the top 6 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 189AverageC$ 358FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 201AverageC$ 432FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 239AverageC$ 490FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 291AverageC$ 406FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 335AverageC$ 635FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJet EncoreCheapestC$ 572AverageC$ 1,011FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore 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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