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Cheap flights from Illinois to Missouri 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 Illinois to Missouri departing on 4/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to Missouri

Cheap round-trip flights

Enter your travel dates to find the best prices.
Contour Logo
11:50 am - 1:30 pm
ORD
-
CGI
1h 40mnonstop
Contour Logo
9:25 am - 11:10 am
CGI
-
ORD
1h 45mnonstop
$122Contour
Sat, Mar 14 - Sat, Mar 21
Contour Logo
11:50 am - 1:30 pm
ORD
-
CGI
1h 40mnonstop
Contour Logo
9:25 am - 11:10 am
CGI
-
ORD
1h 45mnonstop
$123Contour
Thu, Mar 12 - Mon, Mar 16
American Airlines Logo
6:50 pm - 12:12 am
STL
-
MCI
5h 22m
1 stop
American Airlines Logo
10:54 am - 5:13 pm
MCI
-
STL
6h 19m
1 stop
$179American Airlines
Sat, Mar 28 - Sat, Apr 4
American Airlines Logo
8:05 am - 9:33 am
ORD
-
COU
1h 28mnonstop
American Airlines Logo
6:30 pm - 8:05 pm
COU
-
ORD
1h 35mnonstop
$179American Airlines
Fri, Mar 27 - Mon, Mar 30
Southwest Logo
4:05 pm - 5:15 pm
STL
-
MCI
1h 10mnonstop
Southwest Logo
4:50 pm - 5:55 pm
MCI
-
STL
1h 05mnonstop
$185Southwest
Mon, Mar 30 - Wed, Apr 1
United Airlines Logo
8:08 pm - 9:59 pm
ORD
-
COU
1h 51mnonstop
United Airlines Logo
8:00 am - 9:40 am
COU
-
ORD
1h 40mnonstop
$193United Airlines
Thu, Jul 23 - Sun, Jul 26
United Airlines Logo
7:58 pm - 9:33 pm
ORD
-
COU
1h 35mnonstop
United Airlines Logo
11:15 am - 12:45 pm
COU
-
ORD
1h 30mnonstop
$194United Airlines
Wed, Mar 18 - Wed, Mar 25
Southwest Logo
8:40 am - 2:10 pm
STL
-
MCI
5h 30m
1 stop
Southwest Logo
4:50 pm - 5:55 pm
MCI
-
STL
1h 05mnonstop
$195Southwest
Wed, Mar 25 - Wed, Apr 1
Frontier Logo
5:01 am - 4:23 pm
ORD
-
MCI
11h 22m
1 stop
Frontier Logo
11:53 am - 10:39 pm
MCI
-
ORD
10h 46m
1 stop
$215Frontier
Mon, Mar 30 - Thu, Apr 30
Frontier Logo
6:05 am - 5:25 pm
MDW
-
MCI
11h 20m
1 stop
Frontier Logo
11:45 am - 10:19 pm
MCI
-
MDW
10h 34m
1 stop
$225Frontier
Mon, Mar 16 - Wed, Mar 18

American Airlines flights from Illinois to Missouri

Our best American Airlines deals on Illinois to Missouri flight tickets
American Airlines
Mar 27
ORD8:05 amChicago O'Hare Intl
1h 28m
COU9:33 amColumbia Regional
Mar 30
COU6:30 pmColumbia Regional
1h 35m
ORD8:05 pmChicago O'Hare Intl
$179
American Airlines
Apr 8
ORD8:00 amChicago O'Hare Intl
1h 51m
SGF9:51 amSpringfield-Branson
Apr 13
SGF5:19 amSpringfield-Branson
1h 48m
ORD7:07 amChicago O'Hare Intl
$189
American Airlines
Apr 3
ORD8:40 pmChicago O'Hare Intl
1h 51m
SGF10:31 pmSpringfield-Branson
Apr 5
SGF7:36 amSpringfield-Branson
1h 51m
ORD9:27 amChicago O'Hare Intl
$190

Southwest flights from Illinois to Missouri

Our best Southwest deals on Illinois to Missouri flight tickets
Southwest
Mar 30
STL4:05 pmLambert-St Louis
1h 10m
MCI5:15 pmKansas City
Apr 1
MCI4:50 pmKansas City
1h 05m
STL5:55 pmLambert-St Louis
$185
Southwest
Mar 25
STL8:40 amLambert-St Louis
5h 30m
1 stop
MCI2:10 pmKansas City
Apr 1
MCI4:50 pmKansas City
1h 05m
STL5:55 pmLambert-St Louis
$195
Southwest
Mar 28
STL8:25 amLambert-St Louis
1h 10m
MCI9:35 amKansas City
Apr 4
MCI5:20 pmKansas City
6h 45m
1 stop
STL12:05 amLambert-St Louis
$203

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Missouri 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 March 1, 2026.
Use the filters below to find and compare flights from Illinois to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoCape Girardeau

ORD - CGI

ORDCGI

Chicago O'Hare Intl

Sat 3/14

11:50 am-1:30 pm

Nonstop1h 40m

Cape Girardeau

Sat 3/21

9:25 am-11:10 am

Nonstop1h 45m

$122

ChicagoCape Girardeau

ORD - CGI

ORDCGI

Chicago O'Hare Intl

Thu 3/12

11:50 am-1:30 pm

Nonstop1h 40m

Cape Girardeau

Mon 3/16

9:25 am-11:10 am

Nonstop1h 45m

$123

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Sat 3/28

6:50 pm-12:12 am

1 stop5h 22m

Kansas City

Sat 4/4

10:54 am-5:13 pm

1 stop6h 19m

$179

ChicagoColumbia

ORD - COU

ORDCOU

Chicago O'Hare Intl

Fri 3/27

8:05 am-9:33 am

Nonstop1h 28m

Columbia Regional

Mon 3/30

6:30 pm-8:05 pm

Nonstop1h 35m

$179

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Mon 3/30

4:05 pm-5:15 pm

Nonstop1h 10m

Kansas City

Wed 4/1

4:50 pm-5:55 pm

Nonstop1h 05m

$185

ChicagoColumbia

ORD - COU

ORDCOU

Chicago O'Hare Intl

Thu 7/23

8:08 pm-9:59 pm

Nonstop1h 51m

Columbia Regional

Sun 7/26

8:00 am-9:40 am

Nonstop1h 40m

$193

ChicagoColumbia

ORD - COU

ORDCOU

Chicago O'Hare Intl

Wed 3/18

7:58 pm-9:33 pm

Nonstop1h 35m

Columbia Regional

Wed 3/25

11:15 am-12:45 pm

Nonstop1h 30m

$194

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Wed 3/25

8:40 am-2:10 pm

1 stop5h 30m

Kansas City

Wed 4/1

4:50 pm-5:55 pm

Nonstop1h 05m

$195

ChicagoKansas City

ORD - MCI

ORDMCI

Chicago O'Hare Intl

Mon 3/30

5:01 am-4:23 pm

1 stop11h 22m

Kansas City

Thu 4/30

11:53 am-10:39 pm

1 stop10h 46m

$215

ChicagoKansas City

MDW - MCI

MDWMCI

Chicago Midway

Mon 3/16

6:05 am-5:25 pm

1 stop11h 20m

Kansas City

Wed 3/18

11:45 am-10:19 pm

1 stop10h 34m

$225

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 Missouri from

How to get the cheapest flight ticket from Illinois to Missouri

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 Missouri?

In general, December is the cheapest month to fly from Illinois to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $217. If you aren’t able to travel to Missouri during the month of December, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $240.

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

The cheapest day to depart from Illinois to Missouri is on a Saturday when prices can be found for as low as $284. Flights from Illinois to Missouri on a Monday will generally be more expensive and average around $524. 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 Missouri?

According to our data, the cheapest time of day to fly to Missouri is at noon. momondo users have found flights departing from Illinois to Missouri at noon for as low as $319. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly in the afternoon, with an average ticket price of $481. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Illinois to Missouri flight route?

Fly from Chicago O'Hare Intl to Lambert-St Louis for the best Illinois - Missouri flight prices

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

You are more likely to see cheaper flights to Missouri from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $318 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Illinois for as low as $165 on momondo.

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

There are 4 cabin classes available to choose from on Illinois to Missouri 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 Illinois to Missouri flights?

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

Cheap Illinois to Missouri flight deals and tips

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

Best Price Found

$64

Fastest flight time

1h 05m

Direct flights

Every day

Airports in Missouri

55 airports
The best one-way flight to Missouri from Illinois in the past 72 hours is $64. The best round-trip flight deal from Illinois to Missouri found on momondo in the last 72 hours is $61.
The fastest flight from Illinois to Missouri takes 1h 05m
Direct flights go from Illinois to Missouri every day.
There are 55 airports in Missouri. From Illinois there are direct flights to Kansas City (MCI), Lambert-St Louis (STL).
Search flight deals

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

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

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

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

    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 Illinois to Missouri.

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

    The travel and health documents you'll need for your trip to Missouri may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missouri. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Illinois to Missouri

Compare and see reviews for airlines that fly from Illinois to Missouri with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $77Free CancellationRating
8.0
4,303 reviews
Search Southwest flights
ContourPriceFrom $105Free CancellationRating
7.6
42 reviews
Search Contour flights
American AirlinesPriceFrom $115Free CancellationRating
7.1
11,370 reviews
Search American Airlines flights
United AirlinesPriceFrom $144Free CancellationRating
7.4
9,371 reviews
Search United Airlines flights
Southern / MokulelePriceFrom $156Free CancellationRating
0.0
0 reviews
Search Southern / Mokulele flights

Why use momondo?

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

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

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

Flights from Illinois to Missouri with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Illinois to Missouri flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Illinois to Missouri flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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