Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Calgary to Illinois from C$ 137

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Calgary to Illinois departing on 4/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Calgary to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
9:00 a.m. - 1:35 p.m.
YYC
-
ORD
3h 35mdirect
WestJet Logo
2:20 p.m. - 5:15 p.m.
ORD
-
YYC
3h 55mdirect
C$ 229WestJet
Fri, 6 Mar - Mon, 9 Mar
WestJet Logo
12:00 p.m. - 4:40 p.m.
YYC
-
ORD
3h 40mdirect
WestJet Logo
5:30 p.m. - 8:25 p.m.
ORD
-
YYC
3h 55mdirect
C$ 259WestJet
Wed, 20 May - Tue, 26 May
WestJet Logo
12:00 p.m. - 4:40 p.m.
YYC
-
ORD
3h 40mdirect
WestJet Logo
5:30 p.m. - 8:25 p.m.
ORD
-
YYC
3h 55mdirect
C$ 261WestJet
Wed, 20 May - Tue, 26 May
Air Canada Logo
11:40 p.m. - 9:10 a.m.
YYC
-
ORD
8h 30m
1 stop
Air Canada Logo
6:40 p.m. - 8:28 a.m.
ORD
-
YYC
14h 48m
1 stop
C$ 284Air Canada
Mon, 30 Mar - Tue, 7 Apr
Air Canada Logo
7:10 a.m. - 3:10 p.m.
YYC
-
ORD
7h 00m
1 stop
Air Canada Logo
3:55 p.m. - 1:14 a.m.
ORD
-
YYC
10h 19m
1 stop
C$ 305Air Canada
Wed, 4 Mar - Wed, 11 Mar
United Airlines Logo
8:30 a.m. - 1:07 p.m.
YYC
-
ORD
3h 37mdirect
United Airlines Logo
7:42 p.m. - 10:37 p.m.
ORD
-
YYC
3h 55mdirect
C$ 313United Airlines
Fri, 5 Jun - Sun, 7 Jun
Delta Logo
6:45 a.m. - 4:52 p.m.
YYC
-
ORD
9h 07m
1 stop
Delta Logo
2:11 p.m. - 10:57 p.m.
ORD
-
YYC
9h 46m
1 stop
C$ 314Delta
Fri, 8 May - Tue, 12 May
Delta Logo
6:30 a.m. - 1:05 p.m.
YYC
-
MDW
5h 35m
1 stop
Delta Logo
11:45 a.m. - 11:05 p.m.
MDW
-
YYC
12h 20m
2 stops
C$ 359Delta
Wed, 25 Feb - Sat, 28 Feb
American Airlines Logo
6:30 a.m. - 3:28 p.m.
YYC
-
STL
7h 58m
1 stop
American Airlines Logo
6:00 a.m. - 3:32 p.m.
STL
-
YYC
10h 32m
2 stops
C$ 720American Airlines
Thu, 19 Feb - Sun, 22 Feb
United Airlines Logo
8:30 a.m. - 3:46 p.m.
YYC
-
STL
6h 16m
1 stop
United Airlines Logo
9:23 a.m. - 10:37 p.m.
STL
-
YYC
14h 14m
1 stop
C$ 737United Airlines
Fri, 31 Jul - Sun, 9 Aug

Air Canada flights from Calgary to Illinois

Our best Air Canada deals on Calgary to Illinois flight tickets
Air Canada
30 Mar
YYC11:40 p.m.Calgary
8h 30m
1 stop
ORD9:10 a.m.Chicago O'Hare Intl
7 Apr
ORD6:40 p.m.Chicago O'Hare Intl
14h 48m
1 stop
YYC8:28 a.m.Calgary
C$ 284
Air Canada
4 Mar
YYC7:10 a.m.Calgary
7h 00m
1 stop
ORD3:10 p.m.Chicago O'Hare Intl
11 Mar
ORD3:55 p.m.Chicago O'Hare Intl
10h 19m
1 stop
YYC1:14 a.m.Calgary
C$ 305
Air Canada
31 Mar
YYC9:00 a.m.Calgary
8h 53m
1 stop
ORD6:53 p.m.Chicago O'Hare Intl
8 Apr
ORD10:43 a.m.Chicago O'Hare Intl
10h 15m
1 stop
YYC7:58 p.m.Calgary
C$ 328

WestJet flights from Calgary to Illinois

Our best WestJet deals on Calgary to Illinois flight tickets
WestJet
6 Mar
YYC9:00 a.m.Calgary
3h 35m
ORD1:35 p.m.Chicago O'Hare Intl
9 Mar
ORD2:20 p.m.Chicago O'Hare Intl
3h 55m
YYC5:15 p.m.Calgary
C$ 229
WestJet
20 May
YYC12:00 p.m.Calgary
3h 40m
ORD4:40 p.m.Chicago O'Hare Intl
26 May
ORD5:30 p.m.Chicago O'Hare Intl
3h 55m
YYC8:25 p.m.Calgary
C$ 259
WestJet
20 May
YYC12:00 p.m.Calgary
3h 40m
ORD4:40 p.m.Chicago O'Hare Intl
26 May
ORD5:30 p.m.Chicago O'Hare Intl
3h 55m
YYC8:25 p.m.Calgary
C$ 261

momondo 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, momondo users made 96,600 searches. Data last updated 3 February 2026.
Use the filters below to find and compare flights from Calgary to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 6/3

9:00 a.m.-1:35 p.m.

Nonstop3h 35m

Chicago O'Hare Intl

Mon 9/3

2:20 p.m.-5:15 p.m.

Nonstop3h 55m

C$ 229

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 20/5

12:00 p.m.-4:40 p.m.

Nonstop3h 40m

Chicago O'Hare Intl

Tue 26/5

5:30 p.m.-8:25 p.m.

Nonstop3h 55m

C$ 259

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 20/5

12:00 p.m.-4:40 p.m.

Nonstop3h 40m

Chicago O'Hare Intl

Tue 26/5

5:30 p.m.-8:25 p.m.

Nonstop3h 55m

C$ 261

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Mon 30/3

11:40 p.m.-9:10 a.m.

1 stop8h 30m

Chicago O'Hare Intl

Tue 7/4

6:40 p.m.-8:28 a.m.

1 stop14h 48m

C$ 284

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Wed 4/3

7:10 a.m.-3:10 p.m.

1 stop7h 00m

Chicago O'Hare Intl

Wed 11/3

3:55 p.m.-1:14 a.m.

1 stop10h 19m

C$ 305

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 5/6

8:30 a.m.-1:07 p.m.

Nonstop3h 37m

Chicago O'Hare Intl

Sun 7/6

7:42 p.m.-10:37 p.m.

Nonstop3h 55m

C$ 313

CalgaryChicago

YYC - ORD

YYCORD

Calgary

Fri 8/5

6:45 a.m.-4:52 p.m.

1 stop9h 07m

Chicago O'Hare Intl

Tue 12/5

2:11 p.m.-10:57 p.m.

1 stop9h 46m

C$ 314

CalgaryChicago

YYC - MDW

YYCMDW

Calgary

Wed 25/2

6:30 a.m.-1:05 p.m.

1 stop5h 35m

Chicago Midway

Sat 28/2

11:45 a.m.-11:05 p.m.

2 stops12h 20m

C$ 359

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 19/2

6:30 a.m.-3:28 p.m.

1 stop7h 58m

Lambert-St Louis

Sun 22/2

6:00 a.m.-3:32 p.m.

2 stops10h 32m

C$ 720

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 31/7

8:30 a.m.-3:46 p.m.

1 stop6h 16m

Lambert-St Louis

Sun 9/8

9:23 a.m.-10:37 p.m.

1 stop14h 14m

C$ 737

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Illinois from

How to get the cheapest flight ticket from Calgary to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

In general, April is the cheapest month to fly from Calgary to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 257. If you don’t want to visit Illinois in April, then you should wait until November to fly from Calgary, when ticket prices are also cheap, with an average price of C$ 258.

What is the cheapest day to depart on your flight to Illinois?

According to our data, Friday is the cheapest day to fly to Illinois from Calgary. The lowest ticket price found for a Friday departure recently was C$ 587. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Sunday, with ticket prices averaging around C$ 1,002.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Calgary to Illinois during this time can be as low as C$ 712. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,401 on average. Flights to Illinois from Calgary at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Calgary to Illinois flight route?

Fly from Calgary to Chicago O'Hare Intl for the best Calgary - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Calgary when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 350 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Calgary for as low as C$ 221 on momondo.

What cabin class options are available on Calgary to Illinois flights?

There are 4 cabin classes available to choose from on Calgary to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Calgary to Illinois flights?

No. A direct flight is the cheapest option for a flight between Calgary to Illinois.

Cheap Calgary to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Calgary to Illinois

Best price found

C$ 199

Fastest flight time

3h 25m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Calgary in the past 72 hours is C$ 199. The best round-trip flight deal from Calgary to Illinois found on momondo in the last 72 hours is C$ 523.
The fastest flight from Calgary to Illinois takes 3h 25m
Direct flights go from Calgary to Illinois every day.
There are 98 airports in Illinois. From Calgary there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from Calgary Airport to Illinois?

    Prices for flights from Calgary Airport to Illinois were last updated today.

  • How many operators does momondo search for flights from Calgary Airport to Illinois?

  • How old do you have to be to fly from Calgary Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Calgary Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Calgary to Illinois?

Best airlines flying from Calgary to Illinois

Compare and see reviews for airlines that fly from Calgary to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 121Free CancellationRating
7.1
10,684 reviews
Search Air Canada flights
DeltaPriceFrom C$ 147Free CancellationRating
7.9
8,138 reviews
Search Delta flights
American AirlinesPriceFrom C$ 169Free CancellationRating
7.2
11,216 reviews
Search American Airlines flights
WestJetPriceFrom C$ 173Free CancellationRating
7.2
3,255 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 176Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Calgary to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Calgary to Illinois . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Calgary to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Calgary which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Calgary to Illinois?

Once all potential Calgary to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Calgary to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Calgary to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 5/3
Thu 12/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular Cities in Illinois

Popular flights according to clicks in the last 7 days on momondo
Flights to Fort Lauderdalefrom C$ 161
Flights to Orlandofrom C$ 175
Flights to New Yorkfrom C$ 251
Flights to Las Vegasfrom C$ 152
Flights to Los Angelesfrom C$ 145
Flights to Miamifrom C$ 317
Flights to San Franciscofrom C$ 152
Flights to Honolulufrom C$ 333
Flights to Phoenixfrom C$ 172
Flights to Tampafrom C$ 198
Flights to Chicagofrom C$ 216
Flights to Houstonfrom C$ 243