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Cheap flights from Chicago to Illinois from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Illinois departing on 10/14. 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
0 bags

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Cheap round-trip flights

Contour Logo
11:40 am - 1:00 pmORD-BRL
1h 20mnonstop
Contour Logo
9:40 am - 10:50 amBRL-ORD
1h 10mnonstop
$101Contour
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dom., oct. 19 - dom., oct. 26
Southwest Logo
9:30 am - 2:15 pmMDW-STL
4h 45m2 stops
Southwest Logo
2:15 pm - 6:50 pmSTL-MDW
4h 35m1 stop
$102Southwest
Find Deal
lun., ene. 5 - mar., ene. 6
United Airlines Logo
11:01 am - 12:28 pmORD-STL
1h 27mnonstop
United Airlines Logo
11:10 am - 12:40 pmSTL-ORD
1h 30mnonstop
$137United Airlines
Find Deal
jue., oct. 16 - mar., oct. 21
American Airlines Logo
11:40 am - 1:05 pmORD-STL
1h 25mnonstop
American Airlines Logo
5:40 pm - 7:20 pmSTL-ORD
1h 40mnonstop
$138American Airlines
Find Deal
mié., nov. 5 - mié., nov. 12
Frontier Logo
5:05 am - 10:16 amORD-STL
5h 11m1 stop
Frontier Logo
4:52 pm - 11:39 pmSTL-ORD
6h 47m1 stop
$143Frontier
Find Deal
vie., oct. 24 - vie., oct. 31
Frontier Logo
6:15 am - 4:01 pmMDW-STL
9h 46m1 stop
Frontier Logo
4:56 pm - 10:08 pmSTL-MDW
5h 12m1 stop
$144Frontier
Find Deal
vie., nov. 7 - vie., nov. 14
United Airlines Logo
4:55 pm - 6:04 pmORD-DEC
1h 09mnonstop
United Airlines Logo
6:55 pm - 8:10 pmDEC-ORD
1h 15mnonstop
$149United Airlines
Find Deal
dom., oct. 5 - dom., oct. 12
American Airlines Logo
12:12 pm - 1:35 pmORD-STL
1h 23mnonstop
American Airlines Logo
6:00 am - 7:23 amSTL-ORD
1h 23mnonstop
$154American Airlines
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sáb., oct. 25 - lun., oct. 27
Southern / Mokulele Logo
1:10 pm - 4:35 pmORD-STL
3h 25m1 stop
Southern / Mokulele Logo
1:00 pm - 4:19 pmSTL-ORD
3h 19m1 stop
$168Southern / Mokulele
Find Deal
mar., oct. 21 - lun., oct. 27
Southern / Mokulele Logo
8:15 am - 4:35 pmORD-STL
8h 20m1 stop
Southern / Mokulele Logo
1:00 pm - 7:24 amSTL-ORD
18h 24m1 stop
$183Southern / Mokulele
Find Deal
dom., oct. 19 - mar., oct. 21

Southern / Mokulele flights from Chicago to Illinois

Our best Southern / Mokulele deals on Chicago to Illinois flight tickets
Southern / Mokulele
Oct 21
ORD1:10 pmChicago O'Hare Intl
3h 25m
1 stop
STL4:35 pmLambert-St Louis
Oct 27
STL1:00 pmLambert-St Louis
3h 19m
1 stop
ORD4:19 pmChicago O'Hare Intl
$168
Find similar
Southern / Mokulele
Oct 19
ORD8:15 amChicago O'Hare Intl
8h 20m
1 stop
STL4:35 pmLambert-St Louis
Oct 21
STL1:00 pmLambert-St Louis
18h 24m
1 stop
ORD7:24 amChicago O'Hare Intl
$183
Find similar
Southern / Mokulele
Oct 13
ORD8:15 amChicago O'Hare Intl
8h 20m
1 stop
STL4:35 pmLambert-St Louis
Oct 16
STL1:00 pmLambert-St Louis
18h 24m
1 stop
ORD7:24 amChicago O'Hare Intl
$185
Find similar

Frontier flights from Chicago to Illinois

Our best Frontier deals on Chicago to Illinois flight tickets
Frontier
Oct 24
ORD5:05 amChicago O'Hare Intl
5h 11m
1 stop
STL10:16 amLambert-St Louis
Oct 31
STL4:52 pmLambert-St Louis
6h 47m
1 stop
ORD11:39 pmChicago O'Hare Intl
$143
Find similar
Frontier
Nov 7
MDW6:15 amChicago Midway
9h 46m
1 stop
STL4:01 pmLambert-St Louis
Nov 14
STL4:56 pmLambert-St Louis
5h 12m
1 stop
MDW10:08 pmChicago Midway
$144
Find similar
Frontier
Nov 14
MDW6:15 amChicago Midway
9h 46m
1 stop
STL4:01 pmLambert-St Louis
Nov 16
STL11:17 amLambert-St Louis
10h 46m
1 stop
MDW10:03 pmChicago Midway
$150
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated septiembre 23, 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

dom. 10/19

11:40 am-1:00 pm

Nonstop1h 20m

Burlington

dom. 10/26

9:40 am-10:50 am

Nonstop1h 10m

$101

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

lun. 1/5

9:30 am-2:15 pm

2 stops4h 45m

Lambert-St Louis

mar. 1/6

2:15 pm-6:50 pm

1 stop4h 35m

$102

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 10/16

11:01 am-12:28 pm

Nonstop1h 27m

Lambert-St Louis

mar. 10/21

11:10 am-12:40 pm

Nonstop1h 30m

$137

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 11/5

11:40 am-1:05 pm

Nonstop1h 25m

Lambert-St Louis

mié. 11/12

5:40 pm-7:20 pm

Nonstop1h 40m

$138

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 10/24

5:05 am-10:16 am

1 stop5h 11m

Lambert-St Louis

vie. 10/31

4:52 pm-11:39 pm

1 stop6h 47m

$143

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

vie. 11/7

6:15 am-4:01 pm

1 stop9h 46m

Lambert-St Louis

vie. 11/14

4:56 pm-10:08 pm

1 stop5h 12m

$144

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

dom. 10/5

4:55 pm-6:04 pm

Nonstop1h 09m

Decatur Arpt

dom. 10/12

6:55 pm-8:10 pm

Nonstop1h 15m

$149

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 10/25

12:12 pm-1:35 pm

Nonstop1h 23m

Lambert-St Louis

lun. 10/27

6:00 am-7:23 am

Nonstop1h 23m

$154

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mar. 10/21

1:10 pm-4:35 pm

1 stop3h 25m

Lambert-St Louis

lun. 10/27

1:00 pm-4:19 pm

1 stop3h 19m

$168

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

dom. 10/19

8:15 am-4:35 pm

1 stop8h 20m

Lambert-St Louis

mar. 10/21

1:00 pm-7:24 am

1 stop18h 24m

$183

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Chicago 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 Chicago to Illinois flight route?

Fly from Chicago O'Hare Intl to Moline Quad-City for the best Chicago - Illinois flight prices

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

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

Cheap Chicago to Illinois flight deals and tips

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

Best Price Found

$108

Fastest flight time

0h 55m

Direct flights

Every day

Airports in Illinois

6 airports
The best one-way flight to Illinois from Chicago in the past 72 hours is $108. The best round-trip flight deal from Chicago to Illinois found on momondo in the last 72 hours is $133.
The fastest flight from Chicago to Illinois takes 0h 55m
Direct flights go from Chicago to Illinois every day.
There are 6 airports near Illinois: Decatur Arpt (DEC), Greater Peoria (PIA), Lambert-St Louis (STL), Moline Quad-City (MLI), Champaign University-Willard (CMI), Bloomington-Normal (BMI)
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  • When did momondo last update prices for flights from Chicago to Illinois?

    Prices for flights from Chicago to Illinois were last updated today.

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

  • How old do you have to be to fly from Chicago 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 Chicago to Illinois.

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

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Chicago to Illinois

Compare and see reviews for airlines that fly from Chicago to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $179Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
American AirlinesPriceFrom $179Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

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

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

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

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

momondo helps you find the best flight between Chicago and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Chicago 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.

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