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$60+ Cheap flights from Chicago (CHI) 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — ORD
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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Cheap flight deals from Chicago to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 November 20, 2024.

Find flight deals from Chicago to Illinois

Cheapest flights from Chicago to Illinois
Explore the most affordable flight options available from Chicago to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This Mytrip deal was found by Cheapflights users on 11/19. 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.
Thu 12/198:25 amORD - BRL
Nonstop1h 40mSouthern / Mokulele
Wed 12/256:00 amBRL - ORD
Nonstop1h 40mSouthern / Mokulele
Deal found 11/19$72
This Mytrip deal was found by Cheapflights users on 11/19. 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.
Thu 12/128:20 pmORD - STL
1 stop23h 35mSouthern / Mokulele
Mon 12/165:00 pmSTL - ORD
1 stop14h 40mSouthern / Mokulele
Deal found 11/19$102
This Mytrip deal was found by Cheapflights users on 11/19. 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.
Tue 12/1711:24 amORD - STL
1 stop23h 20mMultiple Airlines
Fri 1/312:15 pmSTL - ORD
1 stop3h 35mMultiple Airlines
Deal found 11/19$119
This Southwest deal was found by Cheapflights users on 11/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/107:15 amMDW - STL
Nonstop1h 20mSouthwest
Tue 12/1010:40 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 11/19$133
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Tue 12/103:05 pmORD - STL
Nonstop1h 16mAmerican Airlines
Wed 12/115:45 amSTL - ORD
Nonstop1h 27mAmerican Airlines
Deal found 11/20$137
This United Airlines deal was found by Cheapflights users on 11/20. 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.
Thu 12/59:50 amORD - DEC
Nonstop1h 03mUnited Airlines
Sun 12/811:35 amDEC - ORD
Nonstop1h 08mUnited Airlines
Deal found 11/20$148
This Flightnetwork deal was found by Cheapflights users on 11/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/137:00 amMDW - STL
1 stop16h 24mFrontier
Sun 12/158:34 pmSTL - MDW
1 stop15h 14mFrontier
Deal found 11/19$172
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Fri 12/138:05 pmORD - STL
Nonstop1h 31mUnited Airlines
Wed 12/1811:20 amSTL - ORD
Nonstop1h 27mUnited Airlines
Deal found 11/19$173
This Delta deal was found by Cheapflights users on 11/19. 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.
Mon 12/166:00 amMDW - STL
1 stop6h 03mDelta
Wed 12/1811:25 amSTL - MDW
1 stop5h 36mDelta
Deal found 11/19$176
This Delta deal was found by Cheapflights users on 11/20. 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 12/107:05 amORD - STL
2 stops11h 24mDelta
Wed 12/1110:21 amSTL - ORD
1 stop4h 17mDelta
Deal found 11/20$181
This American Airlines deal was found by Cheapflights users on 11/19. 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.
Tue 12/312:30 pmORD - MLI
Nonstop0h 57mAmerican Airlines
Tue 12/106:00 amMLI - ORD
Nonstop1h 22mAmerican Airlines
Deal found 11/19$184
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Thu 12/1910:00 amORD - PIA
Nonstop1h 19mUnited Airlines
Thu 12/268:15 amPIA - ORD
Nonstop1h 29mUnited Airlines
Deal found 11/19$189

Find flights from Chicago to Illinois within your budget

Customize your flight search to find flights from Chicago 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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Fri 1/3

8:25 am-10:05 am

Nonstop1h 40m

Burlington

Fri 1/10

2:10 pm-3:50 pm

Nonstop1h 40m

$69

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 12/12

8:20 pm-7:55 pm

1 stop23h 35m

Lambert-St Louis

Mon 12/16

5:00 pm-7:40 am

1 stop14h 40m

$102

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 12/17

11:24 am-10:44 am

1 stop23h 20m

Lambert-St Louis

Fri 1/3

12:15 pm-3:50 pm

1 stop3h 35m

$119

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 12/10

7:15 am-8:35 am

Nonstop1h 20m

Lambert-St Louis

Tue 12/10

10:40 am-11:50 am

Nonstop1h 10m

$133

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 1/21

2:10 pm-3:38 pm

Nonstop1h 28m

Lambert-St Louis

Wed 1/22

9:44 am-11:20 am

Nonstop1h 36m

$137

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 1/7

3:00 pm-4:20 pm

Nonstop1h 20m

Lambert-St Louis

Tue 1/14

5:40 am-7:08 am

Nonstop1h 28m

$138

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 12/5

9:50 am-10:53 am

Nonstop1h 03m

Decatur Arpt

Sun 12/8

11:35 am-12:43 pm

Nonstop1h 08m

$148

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 12/12

9:35 am-11:24 pm

1 stop13h 49m

Lambert-St Louis

Sun 12/15

5:02 pm-9:54 am

1 stop16h 52m

$159

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sun 12/15

10:58 am-8:15 am

1 stop21h 17m

Lambert-St Louis

Tue 12/17

3:53 pm-9:55 am

1 stop18h 02m

$168

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 1/7

6:00 am-11:47 am

1 stop5h 47m

Lambert-St Louis

Tue 1/21

6:30 am-1:08 pm

1 stop6h 38m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 55 results
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Best time to book a flight from Chicago to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Chicago 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 Chicago to Illinois

Get recent, data-driven insights about flights from Chicago to Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Chicago to Illinois?

Currently, September is the cheapest month in which you can book a flight from Chicago to Illinois (average of $232). Flying from Chicago to Illinois in June is currently the most expensive (average of $308). 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 CHI to IL?

Find hourly flight availability from Chicago 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 November 20, 2024.

When flying from Chicago 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.

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 November 20, 2024.
To help decide which airline to fly from Chicago to Illinois, see what other customers have to say about Southwest, American Airlines and Southern / Mokulele. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

WestJet
7.3
Good
2,811 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Chicago to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Chicago to Illinois one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $60. However, be on the lookout for offers from Southern / Mokulele and Southwest, as they are both options that can get you from Chicago to Illinois for a low price.

  • What are the most popular routes from Chicago to Illinois?

    Most travelers choose Chicago O'Hare Intl - Lambert-St Louis, Chicago Midway - Lambert-St Louis or Chicago O'Hare Intl - Burlington when deciding on the best route from Chicago to Illinois.

  • Can I find deals for flights from Chicago to Illinois that include hotel bookings?

    Yes. In addition to deals on Chicago to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Illinois.

  • Can I find deals for business class flights from Chicago to Illinois?

    Yes. Cheapflights offers flight deals from Chicago 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 Chicago to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Chicago to Illinois (average of $232). Flying from Chicago to Illinois in June is currently the most expensive (average of $308). 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 Chicago to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Chicago to Illinois

Discover the top 2 airlines that operate flights from Chicago 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$132Average$255FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$365FlexibilityNo cancel feeOn-time71%
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