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Cheap flights from Calgary to Illinois from C$ 153

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — ORD
17 Jun — 24 Jun1
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 12 June 2025.

Round-trip from

C$ 205

One-way from

C$ 153

Popular in

December

Cheapest in

April

Average price

C$ 334

Good round-trip deal

C$ 459 or less

Good one-way deal

C$ 290 or less
WestJet
  • WestJet
  • 31/7-4/8
  • Nonstop
  • 7h 18m total
  • Calgary to Illinois
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Air Canada
  • Air Canada
  • 18/8
  • 1 total stop
  • 7h 47m total
  • Calgary to Illinois
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 32 potential savings vs. average RT price).
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Average for round-trip flights in June 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 12 June 2025.

Thu 31/712:15 p.m.YYC - ORD
Nonstop3h 29mWestJet
Mon 4/85:30 p.m.ORD - YYC
Nonstop3h 49mWestJet
Deal found 11/6C$ 205
Fri 13/66:29 a.m.YYC - ORD
Nonstop3h 25mAmerican Airlines
Tue 17/61:28 p.m.ORD - YYC
1 stop9h 29mAmerican Airlines
Deal found 12/6C$ 238
Tue 17/612:38 p.m.YYC - ORD
Nonstop3h 32mUnited Airlines
Tue 24/65:02 a.m.ORD - YYC
1 stop14h 19mUnited Airlines
Deal found 11/6C$ 261
Sat 6/91:10 a.m.YYC - ORD
1 stop7h 41mAir Canada
Wed 17/96:20 p.m.ORD - YYC
1 stop7h 52mAir Canada
Deal found 11/6C$ 275
Mon 14/78:00 a.m.YYC - ORD
2 stops12h 30mMultiple Airlines
Wed 23/75:30 p.m.ORD - YYC
Nonstop3h 49mMultiple Airlines
Deal found 12/6C$ 287
Sat 13/96:35 a.m.YYC - ORD
2 stops14h 11mDelta
Fri 19/91:55 p.m.ORD - YYC
1 stop10h 17mDelta
Deal found 11/6C$ 308
Tue 17/66:45 a.m.YYC - MDW
1 stop9h 55mDelta
Tue 24/61:47 p.m.MDW - YYC
1 stop8h 10mDelta
Deal found 11/6C$ 328
Wed 9/79:15 a.m.YYC - STL
1 stop23h 37mMultiple Airlines
Sun 13/710:47 a.m.STL - YYC
2 stops34h 13mMultiple Airlines
Deal found 10/6C$ 421
Fri 25/712:30 a.m.YYC - MDW
1 stop21h 05mMultiple Airlines
Sat 2/86:20 a.m.MDW - YYC
2 stops19h 24mMultiple Airlines
Deal found 11/6C$ 476
Tue 15/712:30 a.m.YYC - STL
1 stop14h 48mWestJet
Sat 19/71:23 p.m.STL - YYC
1 stop22h 56mWestJet
Deal found 10/6C$ 592
Mon 21/77:00 a.m.YYC - MDW
2 stops32h 24mPorter Airlines
Tue 5/85:20 p.m.MDW - YYC
2 stops29h 00mPorter Airlines
Deal found 11/6C$ 629
Wed 9/77:00 a.m.YYC - STL
2 stops8h 42mDelta
Sun 13/72:23 p.m.STL - YYC
1 stop9h 34mDelta
Deal found 11/6C$ 636

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 12 June 2025.
Use the filters below to find and compare flights from Calgary to Illinois that are best for you.

Fly from

Calgary

Fly to

Illinois

Route

Depart

Return

Price

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 31/7

12:15 p.m.-4:44 p.m.

Nonstop3h 29m

Chicago O'Hare Intl

Mon 4/8

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

Nonstop3h 49m

C$ 205

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 13/9

6:45 a.m.-9:24 p.m.

1 stop13h 39m

Chicago O'Hare Intl

Sat 20/9

8:30 p.m.-11:19 p.m.

Nonstop3h 49m

C$ 273

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 6/9

1:10 a.m.-9:51 a.m.

1 stop7h 41m

Chicago O'Hare Intl

Wed 17/9

6:20 p.m.-1:12 a.m.

1 stop7h 52m

C$ 275

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 14/7

8:00 a.m.-9:30 p.m.

2 stops12h 30m

Chicago O'Hare Intl

Wed 23/7

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

Nonstop3h 49m

C$ 287

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Sat 13/9

6:35 a.m.-9:46 p.m.

2 stops14h 11m

Chicago O'Hare Intl

Fri 19/9

1:55 p.m.-11:12 p.m.

1 stop10h 17m

C$ 308

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Tue 9/9

6:40 a.m.-5:37 p.m.

1 stop9h 57m

Chicago Midway

Wed 17/9

1:00 p.m.-8:54 p.m.

2 stops8h 54m

C$ 328

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 9/7

9:15 a.m.-9:52 a.m.

1 stop23h 37m

Lambert-St Louis

Sun 13/7

10:47 a.m.-8:00 p.m.

2 stops34h 13m

C$ 421

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Fri 25/7

12:30 a.m.-10:35 p.m.

1 stop21h 05m

Chicago Midway

Sat 2/8

6:20 a.m.-12:44 a.m.

2 stops19h 24m

C$ 476

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 15/7

12:30 a.m.-4:18 p.m.

1 stop14h 48m

Lambert-St Louis

Sat 19/7

1:23 p.m.-11:19 a.m.

1 stop22h 56m

C$ 592

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Mon 21/7

7:00 a.m.-4:24 p.m.

2 stops32h 24m

Chicago Midway

Tue 5/8

5:20 p.m.-9:20 p.m.

2 stops29h 00m

C$ 629

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 29 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.

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, 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$ 352). 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 12 June 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 12 June 2025.

The most flights from YYC to USIL are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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 12 June 2025.
Read reviews from past customers who have flown Alaska Airlines, Porter Airlines and Delta 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
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Porter Airlines
8.0
Very good
288 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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$ 153 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from C$ 160 and C$ 175, 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: Avianca (91%), Air Canada (84%), United Airlines( 84%).

  • 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$ 1,852, our data indicates the cheapest price to be C$ 197. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 261.

  • 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$ 352). 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

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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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 148AverageC$ 336FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 169AverageC$ 420FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 176AverageC$ 271FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 197AverageC$ 363FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 248AverageC$ 564FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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.

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