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Cheap flights from Calgary to Illinois from C$ 154

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYC — ORD
3 Aug — 10 Aug1
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 29 July 2025.

Round-trip from

C$ 211

One-way from

C$ 154

Popular in

December

Cheapest in

April

Average price

C$ 498

Good round-trip deal

C$ 564 or less

Good one-way deal

C$ 296 or less
WestJet
  • WestJet
  • 8/9-25/10
  • Nonstop
  • 7h 17m total
  • Calgary to Illinois
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Air Canada
  • Air Canada
  • 9/9
  • 1 total stop
  • 7h 41m total
  • Calgary to Illinois
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 162 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).
Search Deals
Average for round-trip flights in July 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.
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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 29 July 2025.

Mon 8/912:15 p.m.YYC - ORD
Nonstop3h 28mWestJet
Sat 25/105:30 p.m.ORD - YYC
Nonstop3h 49mWestJet
Deal found 28/7C$ 211
Wed 10/91:10 a.m.YYC - ORD
1 stop7h 41mMultiple Airlines
Wed 17/95:30 p.m.ORD - YYC
Nonstop3h 49mMultiple Airlines
Deal found 27/7C$ 228
Sun 7/91:10 a.m.YYC - ORD
1 stop7h 41mAir Canada
Sat 25/103:35 p.m.ORD - YYC
1 stop8h 41mAir Canada
Deal found 28/7C$ 246
Fri 17/1012:38 p.m.YYC - ORD
Nonstop3h 32mUnited Airlines
Sun 19/105:01 a.m.ORD - YYC
1 stop9h 52mUnited Airlines
Deal found 28/7C$ 270
Thu 4/96:45 a.m.YYC - ORD
1 stop14h 00mAmerican Airlines
Sun 7/98:30 p.m.ORD - YYC
Nonstop3h 49mAmerican Airlines
Deal found 27/7C$ 284
Wed 3/97:55 a.m.YYC - ORD
1 stop8h 35mDelta
Tue 9/91:00 p.m.ORD - YYC
1 stop10h 57mDelta
Deal found 28/7C$ 307
Wed 10/128:55 a.m.YYC - MDW
1 stop11h 49mDelta
Mon 15/126:00 a.m.MDW - YYC
2 stops18h 12mDelta
Deal found 27/7C$ 398
Wed 10/912:30 a.m.YYC - STL
1 stop13h 34mMultiple Airlines
Thu 18/912:05 p.m.STL - YYC
1 stop7h 19mMultiple Airlines
Deal found 28/7C$ 449
Wed 10/912:30 a.m.YYC - MDW
1 stop14h 28mMultiple Airlines
Wed 17/99:00 a.m.MDW - YYC
1 stop12h 00mMultiple Airlines
Deal found 27/7C$ 451
Wed 10/98:00 a.m.YYC - MDW
2 stops23h 39mPorter Airlines
Mon 15/99:35 a.m.MDW - YYC
2 stops13h 53mPorter Airlines
Deal found 27/7C$ 506
Thu 11/96:29 a.m.YYC - STL
1 stop16h 19mAmerican Airlines
Thu 18/97:23 a.m.STL - YYC
1 stop16h 56mAmerican Airlines
Deal found 28/7C$ 528
Sat 23/81:05 a.m.YYC - STL
1 stop17h 55mAir Canada
Sun 31/81:30 p.m.STL - YYC
1 stop10h 43mAir Canada
Deal found 27/7C$ 569

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 29 July 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

Mon 8/9

12:15 p.m.-4:43 p.m.

Nonstop3h 28m

Chicago O'Hare Intl

Sat 25/10

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

Nonstop3h 49m

C$ 211

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Tue 2/9

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

1 stop7h 41m

Chicago O'Hare Intl

Tue 9/9

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

1 stop7h 52m

C$ 226

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 10/9

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

1 stop7h 41m

Chicago O'Hare Intl

Wed 17/9

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

Nonstop3h 49m

C$ 228

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 17/10

12:38 p.m.-5:10 p.m.

Nonstop3h 32m

Chicago O'Hare Intl

Sun 19/10

5:01 a.m.-1:53 p.m.

1 stop9h 52m

C$ 270

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Thu 4/9

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

1 stop14h 00m

Chicago O'Hare Intl

Sun 7/9

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

Nonstop3h 49m

C$ 284

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 3/9

7:55 a.m.-5:30 p.m.

1 stop8h 35m

Chicago O'Hare Intl

Tue 9/9

1:00 p.m.-10:57 p.m.

1 stop10h 57m

C$ 307

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Wed 10/12

8:55 a.m.-9:44 p.m.

1 stop11h 49m

Chicago Midway

Mon 15/12

6:00 a.m.-11:12 p.m.

2 stops18h 12m

C$ 398

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Wed 10/9

12:30 a.m.-3:04 p.m.

1 stop13h 34m

Lambert-St Louis

Thu 18/9

12:05 p.m.-6:24 p.m.

1 stop7h 19m

C$ 449

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Wed 10/9

12:30 a.m.-3:58 p.m.

1 stop14h 28m

Chicago Midway

Wed 17/9

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

1 stop12h 00m

C$ 451

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Wed 10/9

8:00 a.m.-8:39 a.m.

2 stops23h 39m

Chicago Midway

Mon 15/9

9:35 a.m.-10:28 p.m.

2 stops13h 53m

C$ 506

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 32 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 29 July 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 29 July 2025.

The most flights from YYC to USIL are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, 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 29 July 2025.
Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines 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.
Porter Airlines
8.0
Very good
317 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
317 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,979 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,896 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
2,972 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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$ 154 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$ 161 and C$ 162, 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 (87%), Envoy Air (85%), Air Canada( 81%).

  • 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$ 1,582, our data indicates the cheapest price to be C$ 230. The most popular route (Calgary - Chicago O'Hare Intl), is priced around C$ 250.

  • 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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 148AverageC$ 342FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 176AverageC$ 272FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 183AverageC$ 343FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 184AverageC$ 422FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 251AverageC$ 560FlexibilityNo cancel feeOn-time69%
Search United Airlines 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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