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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 5/6. 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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0 bags

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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
12:10 pm - 1:50 pm
ORD
-
CGI
1h 40mnonstop
Contour Logo
9:45 am - 11:30 am
CGI
-
ORD
1h 45mnonstop
$122Contour
jue., abr. 30 - lun., may. 4
Contour Logo
12:10 pm - 1:50 pm
ORD
-
CGI
1h 40mnonstop
Contour Logo
9:45 am - 11:30 am
CGI
-
ORD
1h 45mnonstop
$139Contour
mié., abr. 29 - dom., may. 3
Frontier Logo
5:30 pm - 12:21 am
ORD
-
STL
6h 51m
1 stop
Frontier Logo
4:19 pm - 11:13 pm
STL
-
ORD
6h 54m
1 stop
$181Frontier
vie., may. 8 - dom., may. 10
Frontier Logo
6:00 am - 8:55 am
MDW
-
STL
26h 55m
1 stop
Frontier Logo
6:31 pm - 11:09 am
STL
-
MDW
16h 38m
1 stop
$185Frontier
vie., jun. 5 - mar., jun. 9
American Airlines Logo
7:04 pm - 8:30 pm
ORD
-
STL
1h 26mnonstop
American Airlines Logo
7:30 am - 12:18 pm
STL
-
ORD
4h 48m
1 stop
$189American Airlines
mié., may. 27 - jue., may. 28
Southwest Logo
9:00 am - 10:15 am
MDW
-
STL
1h 15mnonstop
Southwest Logo
4:40 pm - 5:50 pm
STL
-
MDW
1h 10mnonstop
$191Southwest
jue., may. 7 - lun., may. 11
American Airlines Logo
8:55 pm - 10:19 pm
ORD
-
STL
1h 24mnonstop
American Airlines Logo
8:03 pm - 9:40 pm
STL
-
ORD
1h 37mnonstop
$193American Airlines
jue., may. 7 - lun., may. 11
Southwest Logo
9:00 am - 10:15 am
MDW
-
STL
1h 15mnonstop
Southwest Logo
1:35 pm - 7:10 pm
STL
-
MDW
5h 35m
1 stop
$201Southwest
jue., may. 7 - lun., may. 11
United Airlines Logo
8:02 pm - 10:02 pm
ORD
-
SGF
2h 00mnonstop
United Airlines Logo
8:00 am - 9:50 am
SGF
-
ORD
1h 50mnonstop
$279United Airlines
vie., may. 1 - mar., may. 5
United Airlines Logo
1:00 pm - 2:32 pm
ORD
-
COU
1h 32mnonstop
United Airlines Logo
8:00 am - 9:30 am
COU
-
ORD
1h 30mnonstop
$309United Airlines
vie., may. 1 - dom., may. 3

Frontier flights from Illinois to Missouri

Our best Frontier deals on Illinois to Missouri flight tickets
Frontier
May 8
ORD5:30 pmChicago O'Hare Intl
6h 51m
1 stop
STL12:21 amLambert-St Louis
May 10
STL4:19 pmLambert-St Louis
6h 54m
1 stop
ORD11:13 pmChicago O'Hare Intl
$181
Frontier
Jun 5
MDW6:00 amChicago Midway
26h 55m
1 stop
STL8:55 amLambert-St Louis
Jun 9
STL6:31 pmLambert-St Louis
16h 38m
1 stop
MDW11:09 amChicago Midway
$185
Frontier
May 7
ORD9:37 pmChicago O'Hare Intl
35h 18m
2 stops
STL8:55 amLambert-St Louis
May 11
STL5:27 pmLambert-St Louis
14h 28m
1 stop
ORD7:55 amChicago O'Hare Intl
$191

Southwest flights from Illinois to Missouri

Our best Southwest deals on Illinois to Missouri flight tickets
Southwest
May 7
MDW11:40 amChicago Midway
1h 15m
STL12:55 pmLambert-St Louis
May 11
STL7:20 amLambert-St Louis
1h 10m
MDW8:30 amChicago Midway
$191
Southwest
May 7
MDW9:30 pmChicago Midway
1h 15m
STL10:45 pmLambert-St Louis
May 11
STL4:00 pmLambert-St Louis
6h 20m
1 stop
MDW10:20 pmChicago Midway
$201
Southwest
May 27
MDW12:20 pmChicago Midway
5h 35m
1 stop
STL5:55 pmLambert-St Louis
May 28
STL8:25 amLambert-St Louis
6h 30m
2 stops
MDW2:55 pmChicago Midway
$204

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 abril 19, 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

Cheapest round-trip

ChicagoCape Girardeau

ORD - CGI

ORDCGI

Chicago O'Hare Intl

jue. 4/30

12:10 pm-1:50 pm

Nonstop1h 40m

Cape Girardeau

lun. 5/4

9:45 am-11:30 am

Nonstop1h 45m

$122

ChicagoCape Girardeau

ORD - CGI

ORDCGI

Chicago O'Hare Intl

mié. 4/29

12:10 pm-1:50 pm

Nonstop1h 40m

Cape Girardeau

dom. 5/3

9:45 am-11:30 am

Nonstop1h 45m

$139

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 5/8

5:30 pm-12:21 am

1 stop6h 51m

Lambert-St Louis

dom. 5/10

4:19 pm-11:13 pm

1 stop6h 54m

$181

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

vie. 6/5

6:00 am-8:55 am

1 stop26h 55m

Lambert-St Louis

mar. 6/9

6:31 pm-11:09 am

1 stop16h 38m

$185

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 5/27

7:04 pm-8:30 pm

Nonstop1h 26m

Lambert-St Louis

jue. 5/28

7:30 am-12:18 pm

1 stop4h 48m

$189
Quickest round-trip

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

jue. 5/7

9:00 am-10:15 am

Nonstop1h 15m

Lambert-St Louis

lun. 5/11

4:40 pm-5:50 pm

Nonstop1h 10m

$191

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 5/7

8:55 pm-10:19 pm

Nonstop1h 24m

Lambert-St Louis

lun. 5/11

8:03 pm-9:40 pm

Nonstop1h 37m

$193

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

jue. 5/7

9:00 am-10:15 am

Nonstop1h 15m

Lambert-St Louis

lun. 5/11

1:35 pm-7:10 pm

1 stop5h 35m

$201

ChicagoSpringfield

ORD - SGF

ORDSGF

Chicago O'Hare Intl

vie. 5/1

8:02 pm-10:02 pm

Nonstop2h 00m

Springfield-Branson

mar. 5/5

8:00 am-9:50 am

Nonstop1h 50m

$279

ChicagoColumbia

ORD - COU

ORDCOU

Chicago O'Hare Intl

vie. 5/1

1:00 pm-2:32 pm

Nonstop1h 32m

Columbia Regional

dom. 5/3

8:00 am-9:30 am

Nonstop1h 30m

$309

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 $267. Flights from Illinois to Missouri on a Monday will generally be more expensive and average around $565. 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 $336. 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 $528. 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 Cape Girardeau 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 $353 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

$81

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 $81. 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

Frequently asked questions about flying from Illinois to Missouri

  • 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
4,329 reviews
Search Southwest flights
ContourPriceFrom $104Free CancellationRating
7.6
42 reviews
Search Contour flights
American AirlinesPriceFrom $124Free CancellationRating
7.1
11,621 reviews
Search American Airlines flights
United AirlinesPriceFrom $151Free CancellationRating
7.4
9,603 reviews
Search United Airlines flights
Southern / MokulelePriceFrom $165Free 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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mar. 5/19
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