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$61+ Cheap flights from Chicago (CHI) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — ORD
Dec 25 — Jan 11
Wed 12/25
Wed 1/1
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 December 20, 2024.

Round-trip from

$61
(eDestinos)
From Chicago (CHI) to Illinois
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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 December 20, 2024.

This oojo deal was found by Cheapflights users on 12/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/318:20 pmORD - STL
1 stop15h 25mSouthern / Mokulele
Tue 1/712:15 pmSTL - ORD
1 stop3h 35mSouthern / Mokulele
Deal found 12/18$165
This Mytrip deal was found by Cheapflights users on 12/19. 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.
Fri 12/278:25 amORD - BRL
Nonstop1h 40mSouthern / Mokulele
Mon 12/306:00 amBRL - ORD
Nonstop1h 40mSouthern / Mokulele
Deal found 12/19$168
This Delta deal was found by Cheapflights users on 12/18. 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 12/315:50 pmORD - STL
1 stop4h 16mDelta
Tue 1/76:00 amSTL - ORD
2 stops6h 55mDelta
Deal found 12/18$226
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/248:15 amORD - STL
Nonstop1h 21mAmerican Airlines
Wed 12/2510:16 amSTL - ORD
Nonstop1h 21mAmerican Airlines
Deal found 12/17$247
This United Airlines deal was found by Cheapflights users on 12/19. 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.
Wed 12/252:00 pmORD - MLI
Nonstop1h 05mUnited Airlines
Sun 12/298:25 amMLI - ORD
Nonstop1h 21mUnited Airlines
Deal found 12/19$249
This Mytrip deal was found by Cheapflights users on 12/18. 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 12/2412:30 pmORD - STL
1 stop20h 20mMultiple Airlines
Tue 1/74:27 pmSTL - ORD
3 stops26h 52mMultiple Airlines
Deal found 12/18$280
This Southwest deal was found by Cheapflights users on 12/17. 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 12/243:10 pmORD - STL
1 stop5h 35mSouthwest
Wed 12/2511:05 amSTL - ORD
2 stops7h 05mSouthwest
Deal found 12/17$301
This American Airlines deal was found by Cheapflights users on 12/19. 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.
Thu 12/198:50 pmORD - MLI
Nonstop1h 15mAmerican Airlines
Fri 12/2711:21 amMLI - ORD
Nonstop1h 22mAmerican Airlines
Deal found 12/19$364
This American Airlines deal was found by Cheapflights users on 12/19. 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 12/318:30 pmORD - EVV
Nonstop1h 36mAmerican Airlines
Fri 1/33:01 pmEVV - ORD
Nonstop1h 34mAmerican Airlines
Deal found 12/19$374
This Southwest deal was found by Cheapflights users on 12/18. 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.
Mon 12/307:00 pmMDW - STL
Nonstop1h 15mSouthwest
Wed 1/16:55 pmSTL - MDW
Nonstop1h 10mSouthwest
Deal found 12/18$400
This United deal was found by Cheapflights users on 12/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/298:15 pmORD - STL
Nonstop1h 30mUnited Airlines
Wed 1/156:30 amSTL - ORD
Nonstop1h 35mUnited Airlines
Deal found 12/18$428
This Delta deal was found by Cheapflights users on 12/19. 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.
Sun 12/295:04 pmMDW - STL
1 stop5h 02mDelta
Wed 1/16:04 amSTL - MDW
1 stop5h 04mDelta
Deal found 12/19$448

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 2,558,603 searches. Data last updated December 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Thu 5/15

8:25 am-10:05 am

Nonstop1h 40m

Burlington

Thu 5/22

6:00 am-7:40 am

Nonstop1h 40m

$61

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 3/7

8:25 am-8:10 pm

1 stop11h 45m

Lambert-St Louis

Sun 3/16

12:15 pm-3:50 pm

1 stop3h 35m

$101

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sun 2/2

10:58 am-11:31 pm

1 stop12h 33m

Lambert-St Louis

Sun 2/9

5:05 pm-10:28 am

1 stop17h 23m

$136

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 1/16

3:00 pm-4:20 pm

Nonstop1h 20m

Lambert-St Louis

Thu 1/23

5:40 am-7:08 am

Nonstop1h 28m

$167

ChicagoMoline

ORD - MLI

ORDMLI

Chicago O'Hare Intl

Wed 1/8

7:55 pm-9:09 pm

Nonstop1h 14m

Moline Quad-City

Sat 1/11

3:59 pm-5:10 pm

Nonstop1h 11m

$179

ChicagoMoline

ORD - MLI

ORDMLI

Chicago O'Hare Intl

Sat 2/1

9:50 am-10:53 am

Nonstop1h 03m

Moline Quad-City

Sat 2/8

12:55 pm-2:09 pm

Nonstop1h 14m

$180

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 1/13

4:58 pm-11:14 pm

2 stops6h 16m

Lambert-St Louis

Tue 1/14

2:00 pm-6:49 pm

1 stop4h 49m

$186

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 2/1

8:45 pm-10:26 pm

Nonstop1h 41m

Lambert-St Louis

Sat 2/8

1:00 pm-7:37 am

1 stop18h 37m

$208

ChicagoPeoria

ORD - PIA

ORDPIA

Chicago O'Hare Intl

Sun 2/2

2:55 pm-4:01 pm

Nonstop1h 06m

Greater Peoria

Sun 2/9

7:40 am-9:06 am

Nonstop1h 26m

$216

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 1/22

7:00 am-2:43 pm

3 stops31h 43m

Lambert-St Louis

Wed 1/29

12:15 pm-3:50 pm

1 stop3h 35m

$221

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 52 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 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 December 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 December 20, 2024.
To help decide which airline to fly from Chicago to Illinois, see what other customers have to say about Delta, Frontier and American Airlines. 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
4,821 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,821 reviews
Southwest
8.1
Very good
4,821 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,600 reviews
Southwest
8.1
Very good
4,821 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Avelo Airlines
7.5
Good
74 reviews
Southwest
8.1
Very good
4,821 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,043 reviews
Southwest
8.1
Very good
4,821 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,821 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 Southern / Mokulele, with whom users have recently found tickets for as low as $80. However, be on the lookout for offers from Frontier and American Airlines, 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 - Greater Peoria 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, August is the cheapest month in which you can book a flight from Chicago to Illinois (average of $245). Flying from Chicago to Illinois in March is currently the most expensive (average of $317). 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 2,558,603 searches. Data last updated December 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$160Average$368FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$303FlexibilityNo cancel feeOn-time69%
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