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Cheap flights from Calgary to Illinois from C$ 159

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
23 Jun — 30 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 18 June 2025.

Round-trip from

C$ 203

One-way from

C$ 159

Popular in

December

Cheapest in

April

Average price

C$ 332

Good round-trip deal

C$ 461 or less

Good one-way deal

C$ 310 or less
WestJet
  • WestJet
  • 22/7-29/7
  • 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$ 152 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 30 potential savings vs. average RT price).
Search Deals
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 18 June 2025.

Tue 22/712:15 p.m.YYC - ORD
Nonstop3h 29mWestJet
Tue 29/75:30 p.m.ORD - YYC
Nonstop3h 49mWestJet
Deal found 16/6C$ 203
Tue 22/71:10 a.m.YYC - ORD
1 stop6h 59mMultiple Airlines
Wed 30/75:30 p.m.ORD - YYC
Nonstop3h 49mMultiple Airlines
Deal found 16/6C$ 230
Tue 22/712:20 a.m.YYC - ORD
1 stop7h 49mAir Canada
Wed 30/79:55 a.m.ORD - YYC
1 stop16h 15mAir Canada
Deal found 16/6C$ 254
Sat 21/68:30 a.m.YYC - ORD
Nonstop3h 33mUnited Airlines
Sat 28/67:10 a.m.ORD - YYC
1 stop15h 38mUnited Airlines
Deal found 16/6C$ 261
Sun 22/66:29 a.m.YYC - ORD
Nonstop3h 25mAmerican Airlines
Mon 23/68:30 p.m.ORD - YYC
Nonstop3h 59mAmerican Airlines
Deal found 18/6C$ 265
Wed 13/86:40 a.m.YYC - ORD
1 stop9h 05mDelta
Mon 18/82:15 p.m.ORD - YYC
1 stop9h 42mDelta
Deal found 16/6C$ 330
Thu 19/66:45 a.m.YYC - MDW
1 stop9h 55mDelta
Wed 25/61:47 p.m.MDW - YYC
1 stop8h 10mDelta
Deal found 17/6C$ 360
Tue 5/812:30 a.m.YYC - MDW
1 stop9h 10mMultiple Airlines
Fri 8/86:20 a.m.MDW - YYC
1 stop14h 40mMultiple Airlines
Deal found 16/6C$ 460
Fri 18/76:45 a.m.YYC - STL
1 stop12h 46mBritish Airways
Sat 26/710:08 a.m.STL - YYC
1 stop12h 49mBritish Airways
Deal found 16/6C$ 562
Fri 18/77:55 a.m.YYC - STL
1 stop9h 21mDelta
Sun 27/77:00 a.m.STL - YYC
2 stops16h 57mDelta
Deal found 16/6C$ 566
Fri 18/78:30 a.m.YYC - STL
1 stop6h 17mUnited Airlines
Sun 27/75:30 p.m.STL - YYC
1 stop6h 23mUnited Airlines
Deal found 17/6C$ 579
Fri 18/79:15 a.m.YYC - STL
1 stop6h 53mWestJet
Sun 27/76:00 a.m.STL - YYC
1 stop15h 00mWestJet
Deal found 16/6C$ 594

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 18 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

Tue 22/7

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

Nonstop3h 29m

Chicago O'Hare Intl

Tue 29/7

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

Nonstop3h 49m

C$ 203

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 22/7

1:10 a.m.-9:09 a.m.

1 stop6h 59m

Chicago O'Hare Intl

Wed 30/7

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

Nonstop3h 49m

C$ 230

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 22/7

12:20 a.m.-9:09 a.m.

1 stop7h 49m

Chicago O'Hare Intl

Wed 30/7

9:55 a.m.-1:10 a.m.

1 stop16h 15m

C$ 254

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 29/8

6:29 a.m.-10:54 a.m.

Nonstop3h 25m

Chicago O'Hare Intl

Sat 30/8

8:44 p.m.-11:45 a.m.

1 stop16h 01m

C$ 287

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 4/9

6:15 a.m.-11:59 p.m.

1 stop16h 44m

Chicago O'Hare Intl

Mon 8/9

7:45 p.m.-10:29 p.m.

Nonstop3h 44m

C$ 294

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 13/8

6:40 a.m.-4:45 p.m.

1 stop9h 05m

Chicago O'Hare Intl

Mon 18/8

2:15 p.m.-10:57 p.m.

1 stop9h 42m

C$ 330

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Wed 16/7

6:45 a.m.-5:39 p.m.

1 stop9h 54m

Chicago Midway

Tue 22/7

9:24 a.m.-6:40 p.m.

2 stops10h 16m

C$ 451

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Tue 5/8

12:30 a.m.-10:40 a.m.

1 stop9h 10m

Chicago Midway

Fri 8/8

6:20 a.m.-8:00 p.m.

1 stop14h 40m

C$ 460

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 18/7

6:45 a.m.-8:31 p.m.

1 stop12h 46m

Lambert-St Louis

Sat 26/7

10:08 a.m.-9:57 p.m.

1 stop12h 49m

C$ 562

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 18/7

7:55 a.m.-6:16 p.m.

1 stop9h 21m

Lambert-St Louis

Sun 27/7

7:00 a.m.-10:57 p.m.

2 stops16h 57m

C$ 566

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/6

Showing 1-10 of 33 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$ 351). 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 18 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 18 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 18 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

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
289 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
8,810 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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$ 159 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 Delta, with prices starting from C$ 160 and C$ 196, 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 (92%), Air Canada (88%), United Airlines( 88%).

  • 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$ 1,279, our data indicates the cheapest price to be C$ 178. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 257.

  • 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$ 351). 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 18 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 147AverageC$ 338FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 168AverageC$ 417FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 175AverageC$ 269FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 196AverageC$ 361FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 247AverageC$ 556FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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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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