$59+ Cheap flights from Illinois to Chicago (CHI)
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 Illinois to Chicago 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 Illinois to Chicago
Keep the following information in mind while searching for Illinois to Chicago flight deals. Data was last updated June 12, 2025.
Round-trip from | $97 (Southwest) |
|---|---|
One-way from | $59 (Southwest) |
Popular in | July |
Cheapest in | January |
Average price | $229 |
Good round-trip deal | $178 or less |
Good one-way deal | $56 or less |
Find flight deals from Illinois to Chicago
Cheapest flights from Illinois to ChicagoExplore the most affordable flight options available from Illinois to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from Illinois to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This Southwest 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 Southwest 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 Southwest 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 Southwest 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 6/10. 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 United 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 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 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 6/10. 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 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 American Airlines 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 American 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 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier 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 Frontier 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 Illinois to Chicago 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 June 12, 2025.
Use the filters below to find and compare flights from Illinois to Chicago that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Thu 8/7
6:00 pm-11:50 pm
1 stop5h 50m
Chicago Midway
Mon 8/11
7:30 am-8:40 am
Nonstop1h 10m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 8/21
8:50 am-10:21 am
Nonstop1h 31m
Chicago O'Hare Intl
Thu 9/4
10:34 pm-11:48 pm
Nonstop1h 14m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Tue 8/5
6:25 am-12:45 pm
1 stop6h 20m
Chicago O'Hare Intl
Wed 8/6
1:50 pm-9:55 pm
1 stop8h 05m
DecaturChicago
DEC - ORD
DECORD
Decatur Arpt
Thu 7/24
6:55 pm-8:03 pm
Nonstop1h 08m
Chicago O'Hare Intl
Mon 7/28
7:45 am-8:48 am
Nonstop1h 03m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 8/7
5:00 am-6:30 am
Nonstop1h 30m
Chicago O'Hare Intl
Mon 8/11
9:20 pm-10:45 pm
Nonstop1h 25m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Fri 7/25
1:00 pm-4:32 pm
1 stop3h 32m
Chicago O'Hare Intl
Sun 7/27
8:15 am-12:10 pm
1 stop3h 55m
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Sat 11/8
6:30 am-1:09 pm
1 stop6h 39m
Chicago Midway
Tue 11/11
6:00 am-10:40 am
1 stop4h 40m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 11/8
4:45 pm-9:52 pm
1 stop5h 07m
Chicago O'Hare Intl
Tue 11/11
1:16 pm-6:02 pm
1 stop4h 46m
PeoriaChicago
PIA - ORD
PIAORD
Greater Peoria
Tue 8/5
6:00 am-7:06 am
Nonstop1h 06m
Chicago O'Hare Intl
Thu 8/14
8:34 am-9:37 am
Nonstop1h 03m
MolineChicago
MLI - ORD
MLIORD
Moline Quad-City
Fri 10/3
11:20 am-12:29 pm
Nonstop1h 09m
Chicago O'Hare Intl
Sat 10/11
5:08 pm-6:05 pm
Nonstop0h 57m
Best time to book a flight from Illinois to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Illinois with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Chicago
What is the cheapest month to book a flight from Illinois to Chicago?
Currently, August is the cheapest month in which you can book a flight from Illinois to Chicago (average of $245). Flying from Illinois to Chicago 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 IL to CHI?
Find hourly flight availability from Illinois to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Chicago as you normally would.
Rainfall in Chicago by month
Plan your trip to Chicago by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Chicago 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 Chicago when rainfall is around 1.7 in.
Temperature in Chicago by month
Plan your trip to Chicago by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Chicago, 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 Chicago
Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from Illinois to Chicago. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
John,May 2025
PVD - BNA
Related info for your journey
Find useful and relevant information for your journey from Illinois to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Illinois?
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Alternative routes for Illinois to Chicago
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Illinois to Chicago
Discover the top 2 airlines that operate flights from Illinois to Chicago. 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 June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$179 | Average$261 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$179 | Average$332 | FlexibilityNo cancel fee | On-time71% |