Illinois

$94+ Cheap flights from Calgary (YYC) to Illinois

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — ORD
Feb 10 — Feb 171
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Cheap flight deals from Calgary to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Calgary (YYC) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$138
(Kiwi.com)

One-way from

$94
(Justfly.com)

Popular in

December

Cheapest in

February

Average price

$243

Good round-trip deal

$143 or less

Good one-way deal

$189 or less
Provider with most accurate pricing for Calgary-Chicago (CHI) flight deals.
Provider most trusted by Cheapflights users for Calgary-Chicago (CHI) flights.
From Calgary to Illinois
One-way flight from Calgary to Illinois
Highest demand for flights based on searches. 6% potential increase in price ($24 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Calgary to Illinois.
Price to beat on a one-way flight from Calgary to Illinois.

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 February 5, 2025.

This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2011:30 amYYC - ORD
Nonstop3h 26mWestJet
Sun 3/24:45 pmORD - YYC
Nonstop3h 51mWestJet
Deal found 2/4$138
This Air Canada deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/212:35 amYYC - ORD
1 stop8h 26mAir Canada
Sun 4/64:41 pmORD - YYC
1 stop9h 27mAir Canada
Deal found 2/4$175
This Kiwi.com deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2711:30 amYYC - ORD
Nonstop3h 26mMultiple Airlines
Sat 3/14:21 pmORD - YYC
1 stop8h 29mMultiple Airlines
Deal found 2/5$176
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/256:14 amYYC - ORD
1 stop16h 44mUnited Airlines
Tue 3/48:45 amORD - YYC
1 stop13h 56mUnited Airlines
Deal found 2/3$188
This Delta deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/78:00 amYYC - ORD
1 stop9h 23mDelta
Tue 3/111:26 pmORD - YYC
2 stops10h 50mDelta
Deal found 2/4$215
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/256:35 amYYC - MDW
2 stops10h 36mDelta
Wed 3/59:33 amMDW - YYC
2 stops12h 20mDelta
Deal found 2/5$219
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/26:35 amYYC - STL
1 stop9h 18mDelta
Fri 3/72:13 pmSTL - YYC
1 stop10h 02mDelta
Deal found 2/5$293
This American Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/191:32 pmYYC - ORD
Nonstop3h 31mAmerican Airlines
Wed 2/265:00 amORD - YYC
1 stop7h 50mAmerican Airlines
Deal found 2/3$298
This Kiwi.com deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/19:55 amYYC - MDW
1 stop11h 09mMultiple Airlines
Tue 3/48:47 amMDW - YYC
1 stop12h 17mMultiple Airlines
Deal found 2/5$328
This Alaska Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/76:59 pmYYC - ORD
2 stops17h 05mAlaska Airlines
Tue 3/117:45 amORD - YYC
1 stop11h 24mAlaska Airlines
Deal found 2/4$346
This Justfly.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/107:00 amYYC - STL
2 stops8h 49mWestJet
Sun 4/276:00 amSTL - YYC
2 stops13h 40mWestJet
Deal found 2/4$353
This Mytrip deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/211:30 amYYC - STL
2 stops31h 40mMultiple Airlines
Fri 3/71:00 pmSTL - YYC
3 stops34h 25mMultiple Airlines
Deal found 2/4$457

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 2,558,603 searches. Data last updated February 5, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 2/20

11:30 am-3:56 pm

Nonstop3h 26m

Chicago O'Hare Intl

Sun 3/2

4:45 pm-7:36 pm

Nonstop3h 51m

$138

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 4/2

12:35 am-10:01 am

1 stop8h 26m

Chicago O'Hare Intl

Sun 4/6

4:41 pm-1:08 am

1 stop9h 27m

$175

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 2/27

11:30 am-3:56 pm

Nonstop3h 26m

Chicago O'Hare Intl

Sat 3/1

4:21 pm-11:50 pm

1 stop8h 29m

$176

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 2/25

6:14 am-11:58 pm

1 stop16h 44m

Chicago O'Hare Intl

Tue 3/4

8:45 am-9:41 pm

1 stop13h 56m

$188

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 3/7

8:00 am-6:23 pm

1 stop9h 23m

Chicago O'Hare Intl

Tue 3/11

1:26 pm-11:16 pm

2 stops10h 50m

$215

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Tue 2/25

6:35 am-6:11 pm

2 stops10h 36m

Chicago Midway

Wed 3/5

9:33 am-8:53 pm

2 stops12h 20m

$219

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 3/2

6:35 am-4:53 pm

1 stop9h 18m

Lambert-St Louis

Fri 3/7

2:13 pm-11:15 pm

1 stop10h 02m

$293

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 2/19

1:32 pm-6:03 pm

Nonstop3h 31m

Chicago O'Hare Intl

Wed 2/26

5:00 am-11:50 am

1 stop7h 50m

$298

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Sat 3/1

9:55 am-10:04 pm

1 stop11h 09m

Chicago Midway

Tue 3/4

8:47 am-8:04 pm

1 stop12h 17m

$328

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 3/7

6:59 pm-1:04 pm

2 stops17h 05m

Chicago O'Hare Intl

Tue 3/11

7:45 am-6:09 pm

1 stop11h 24m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

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, August is the cheapest month in which you can book a flight from Calgary to Illinois (average of $245). Flying from Calgary to Illinois in March is currently the most expensive (average of $323). 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 February 5, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Calgary to Illinois as you normally would.

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 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 February 5, 2025.
Read through reviews of airlines operating flights from Calgary to Illinois, such as Alaska Airlines, Delta and Porter Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Entertainment

7.1

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

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

Crew

8.5

Entertainment

7.1

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

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

8.0
Very good

Crew

8.5

Entertainment

7.1

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

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