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Cheap flights from Missouri to Illinois from $58

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Illinois departing on 5/25. 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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Find the cheapest flights from Missouri to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Contour Logo
1:30 pm - 3:15 pm
CGI
-
ORD
1h 45mnonstop
Contour Logo
3:55 pm - 5:35 pm
ORD
-
CGI
1h 40mnonstop
$110Contour
Wed, May 6 - Sat, May 9
Contour Logo
1:30 pm - 3:15 pm
CGI
-
ORD
1h 45mnonstop
Contour Logo
3:55 pm - 5:35 pm
ORD
-
CGI
1h 40mnonstop
$111Contour
Wed, Jun 24 - Sat, Jul 4
Frontier Logo
4:19 pm - 11:13 pm
STL
-
ORD
6h 54m
1 stop
Frontier Logo
5:30 pm - 12:21 am
ORD
-
STL
6h 51m
1 stop
$180Frontier
Fri, May 8 - Mon, May 11
Frontier Logo
4:19 pm - 11:13 pm
STL
-
ORD
6h 54m
1 stop
Frontier Logo
5:30 pm - 12:21 am
ORD
-
STL
6h 51m
1 stop
$181Frontier
Fri, May 15 - Mon, May 18
United Airlines Logo
9:06 am - 11:00 am
JLN
-
ORD
1h 54mnonstop
United Airlines Logo
11:32 am - 1:22 pm
ORD
-
JLN
1h 50mnonstop
$201United Airlines
Thu, May 14 - Thu, May 28
United Airlines Logo
8:54 am - 10:52 am
JLN
-
ORD
1h 58mnonstop
United Airlines Logo
4:20 pm - 6:16 pm
ORD
-
JLN
1h 56mnonstop
$202United Airlines
Tue, Jul 21 - Tue, Jul 28
Southwest Logo
5:35 am - 6:45 am
STL
-
MDW
1h 10mnonstop
Southwest Logo
8:55 pm - 10:10 pm
MDW
-
STL
1h 15mnonstop
$213Southwest
Wed, May 20 - Wed, May 27
Southwest Logo
8:45 pm - 9:50 pm
STL
-
MDW
1h 05mnonstop
Southwest Logo
4:15 pm - 8:00 pm
MDW
-
STL
3h 45m
1 stop
$223Southwest
Wed, Aug 12 - Wed, Aug 19
American Airlines Logo
4:28 pm - 6:10 pm
COU
-
ORD
1h 42mnonstop
American Airlines Logo
8:12 am - 9:43 am
ORD
-
COU
1h 31mnonstop
$238American Airlines
Thu, May 14 - Sun, May 17
American Airlines Logo
6:32 pm - 8:22 pm
COU
-
ORD
1h 50mnonstop
American Airlines Logo
1:25 pm - 7:09 pm
ORD
-
COU
5h 44m
1 stop
$248American Airlines
Fri, May 22 - Sat, Jun 6

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Contour flights from Missouri to Illinois

Our best Contour deals on Missouri to Illinois flight tickets
Contour
May 6
CGI1:30 pmCape Girardeau
1h 45m
ORD3:15 pmChicago O'Hare Intl
May 9
ORD3:55 pmChicago O'Hare Intl
1h 40m
CGI5:35 pmCape Girardeau
$110
Contour
Jun 24
CGI1:30 pmCape Girardeau
1h 45m
ORD3:15 pmChicago O'Hare Intl
Jul 4
ORD3:55 pmChicago O'Hare Intl
1h 40m
CGI5:35 pmCape Girardeau
$111
Contour
May 8
CGI9:45 amCape Girardeau
1h 45m
ORD11:30 amChicago O'Hare Intl
May 12
ORD12:10 pmChicago O'Hare Intl
1h 40m
CGI1:50 pmCape Girardeau
$112

Frontier flights from Missouri to Illinois

Our best Frontier deals on Missouri to Illinois flight tickets
Frontier
May 8
STL4:19 pmLambert-St Louis
6h 54m
1 stop
ORD11:13 pmChicago O'Hare Intl
May 9
ORD5:30 pmChicago O'Hare Intl
6h 51m
1 stop
STL12:21 amLambert-St Louis
$180
Frontier
May 15
STL4:19 pmLambert-St Louis
6h 54m
1 stop
ORD11:13 pmChicago O'Hare Intl
May 16
ORD12:05 pmChicago O'Hare Intl
5h 59m
1 stop
STL6:04 pmLambert-St Louis
$181
Frontier
May 9
STL4:19 pmLambert-St Louis
6h 54m
1 stop
ORD11:13 pmChicago O'Hare Intl
May 10
ORD6:50 amChicago O'Hare Intl
10h 04m
1 stop
STL4:54 pmLambert-St Louis
$182

momondo Fare Finder

 
Customize your flight search to find flights from Missouri 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 April 23, 2026.
Use the filters below to find and compare flights from Missouri to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Cape GirardeauChicago

CGI - ORD

CGIORD

Cape Girardeau

Wed 5/6

1:30 pm-3:15 pm

Nonstop1h 45m

Chicago O'Hare Intl

Sat 5/9

3:55 pm-5:35 pm

Nonstop1h 40m

$110

Cape GirardeauChicago

CGI - ORD

CGIORD

Cape Girardeau

Wed 6/24

1:30 pm-3:15 pm

Nonstop1h 45m

Chicago O'Hare Intl

Sat 7/4

3:55 pm-5:35 pm

Nonstop1h 40m

$111

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 5/8

4:19 pm-11:13 pm

1 stop6h 54m

Chicago O'Hare Intl

Mon 5/11

5:30 pm-12:21 am

1 stop6h 51m

$180

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 5/15

4:19 pm-11:13 pm

1 stop6h 54m

Chicago O'Hare Intl

Mon 5/18

5:30 pm-12:21 am

1 stop6h 51m

$181

JoplinChicago

JLN - ORD

JLNORD

Joplin

Thu 5/14

9:06 am-11:00 am

Nonstop1h 54m

Chicago O'Hare Intl

Thu 5/28

11:32 am-1:22 pm

Nonstop1h 50m

$201

JoplinChicago

JLN - ORD

JLNORD

Joplin

Tue 7/21

8:54 am-10:52 am

Nonstop1h 58m

Chicago O'Hare Intl

Tue 7/28

4:20 pm-6:16 pm

Nonstop1h 56m

$202
Quickest round-trip

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Wed 5/20

5:35 am-6:45 am

Nonstop1h 10m

Chicago Midway

Wed 5/27

8:55 pm-10:10 pm

Nonstop1h 15m

$213

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Wed 8/12

8:45 pm-9:50 pm

Nonstop1h 05m

Chicago Midway

Wed 8/19

4:15 pm-8:00 pm

1 stop3h 45m

$223

ColumbiaChicago

COU - ORD

COUORD

Columbia Regional

Thu 5/14

4:28 pm-6:10 pm

Nonstop1h 42m

Chicago O'Hare Intl

Sun 5/17

8:12 am-9:43 am

Nonstop1h 31m

$238

ColumbiaChicago

COU - ORD

COUORD

Columbia Regional

Fri 5/22

6:32 pm-8:22 pm

Nonstop1h 50m

Chicago O'Hare Intl

Sat 6/6

1:25 pm-7:09 pm

1 stop5h 44m

$248

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 Missouri 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 month to fly to Illinois?

The cheapest month to fly to Illinois from Missouri is in August. Flight prices, which tend to average around $205, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $244.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Missouri to Illinois is on a Friday when prices can be found for as low as $611. Flights from Missouri to Illinois on a Saturday will generally be more expensive and average around $804. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Missouri to Illinois during this time can be as low as $566. Flights at noon are often more expensive with an average ticket price of $1,085.

What is the cheapest Missouri to Illinois flight route?

Fly from Cape Girardeau to Chicago O'Hare Intl for the best Missouri - Illinois flight prices

How far in advance should I book a flight from Missouri to Illinois?

You are more likely to see cheaper flights to Illinois from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $309 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Missouri for as low as $194 on momondo.

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

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

Can stopping save me money on Missouri to Illinois flights?

No. A direct flight is the cheapest option for a flight between Missouri to Illinois.

Cheap Missouri to Illinois flight deals and tips

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

Best Price Found

$59

Fastest flight time

1h 05m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Missouri in the past 72 hours is $59. The best round-trip flight deal from Missouri to Illinois found on momondo in the last 72 hours is $263.
The fastest flight from Missouri to Illinois takes 1h 05m
Direct flights go from Missouri to Illinois every day.
There are 98 airports in Illinois. From Missouri there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Missouri to Illinois

  • When did momondo last update prices for flights from Missouri to Illinois?

    Prices for flights from Missouri to Illinois refresh daily.

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

  • How old do you have to be to fly from Missouri to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Illinois.

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

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Best airlines flying from Missouri to Illinois

Compare and see reviews for airlines that fly from Missouri to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $97Free CancellationRating
7.1
11,664 reviews
Search American Airlines flights
SouthwestPriceFrom $117Free CancellationRating
8.0
4,331 reviews
Search Southwest flights
United AirlinesPriceFrom $117Free CancellationRating
7.4
9,644 reviews
Search United Airlines flights
ContourPriceFrom $118Free CancellationRating
7.6
42 reviews
Search Contour flights
Southern / MokulelePriceFrom $140Free CancellationRating
0.0
0 reviews
Search Southern / Mokulele flights
FrontierPriceFrom $143Free CancellationRating
5.6
2,980 reviews
Search Frontier flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Missouri.

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

Yes. All flights to Illinois from Missouri on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Missouri 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 Missouri to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Missouri are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Illinois trip

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