$49+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Chicago to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Chicago to Illinois
Keep the following information in mind while searching for Chicago to Illinois flight deals. Data was last updated junio 12, 2025.
Round-trip from | $96 (Flightnetwork) |
|---|---|
One-way from | $49 (Southwest) |
Good round-trip deal | $168 or less |
Good one-way deal | $99 or less |
Find flight deals from Chicago to Illinois
Cheapest flights from Chicago to IllinoisExplore 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 junio 12, 2025.
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 junio 12, 2025.
This Flightnetwork deal was found by Cheapflights users on 6/10. 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.
This Southwest deal was found by Cheapflights users on 6/12. 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.
This Southwest deal was found by Cheapflights users on 6/12. 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.
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/11. 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.
This Trip.com deal was found by Cheapflights users on 6/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/11. 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.
This United Airlines deal was found by Cheapflights users on 6/12. 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.
This Jettzy deal was found by Cheapflights users on 6/12. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/10. 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.
This Delta deal was found by Cheapflights users on 6/11. 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.
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Cheapflights Fare Finder
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 junio 12, 2025.
Use the filters below to find and compare flights from Chicago to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
ChicagoBurlington
ORD - BRL
ORDBRL
Chicago O'Hare Intl
vie. 7/25
6:40 pm-8:00 pm
Nonstop1h 20m
Burlington
vie. 8/1
9:20 am-10:30 am
Nonstop1h 10m
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
jue. 8/7
2:35 pm-3:45 pm
Nonstop1h 10m
Lambert-St Louis
lun. 8/11
3:55 pm-8:50 pm
1 stop4h 55m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
jue. 8/7
5:45 pm-10:35 pm
1 stop4h 50m
Lambert-St Louis
lun. 8/11
5:10 am-10:45 am
1 stop5h 35m
ChicagoBurlington
ORD - BRL
ORDBRL
Chicago O'Hare Intl
mié. 6/25
8:25 am-10:05 am
Nonstop1h 40m
Burlington
dom. 6/29
2:10 pm-3:50 pm
Nonstop1h 40m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
sáb. 8/9
6:55 am-8:20 am
Nonstop1h 25m
Lambert-St Louis
lun. 8/11
6:00 am-7:24 am
Nonstop1h 24m
ChicagoBurlington
ORD - BRL
ORDBRL
Chicago O'Hare Intl
vie. 6/27
8:20 pm-10:00 pm
Nonstop1h 40m
Burlington
mar. 7/1
9:20 am-10:30 am
Nonstop1h 10m
ChicagoDecatur
ORD - DEC
ORDDEC
Chicago O'Hare Intl
jue. 6/26
5:00 pm-6:03 pm
Nonstop1h 03m
Decatur Arpt
lun. 6/30
9:45 am-10:55 am
Nonstop1h 10m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
jue. 8/28
2:20 pm-3:44 pm
Nonstop1h 24m
Lambert-St Louis
lun. 9/1
5:30 pm-6:55 pm
Nonstop1h 25m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
dom. 7/27
8:15 am-4:45 pm
1 stop8h 30m
Lambert-St Louis
dom. 8/3
5:15 pm-8:52 pm
1 stop3h 37m
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
sáb. 9/20
9:30 am-1:20 pm
1 stop3h 50m
Lambert-St Louis
sáb. 10/4
3:30 pm-9:44 pm
1 stop6h 14m
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.
Cheapflights Insights
Everything you need to know about your flight from Chicago to Illinois
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 $321). 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 junio 12, 2025.
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 junio 12, 2025.
To help decide which airline to fly from Chicago to Illinois, see what other customers have to say about Southwest, Delta and United 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.
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
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.
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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.
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 junio 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$169 | Average$387 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$179 | Average$339 | FlexibilityNo cancel fee | On-time69% |