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Cheap flights from Missouri to Illinois from $61

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 9/2. 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
1 adult, Economy, 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.
Frontier Logo
6:16 pm - 8:52 am
MCI
-
STL
14h 36m
1 stop
Frontier Logo
4:57 pm - 5:10 pm
STL
-
MCI
24h 13m
1 stop
$154Frontier
ven, lug 3 - ven, lug 10
Frontier Logo
6:07 pm - 5:37 pm
MCI
-
STL
23h 30m
1 stop
Frontier Logo
4:57 pm - 5:10 pm
STL
-
MCI
24h 13m
1 stop
$179Frontier
lun, lug 6 - ven, lug 10
Delta Logo
2:10 pm - 8:27 pm
STL
-
ORD
6h 17m
1 stop
Delta Logo
2:12 pm - 8:42 pm
ORD
-
STL
6h 30m
1 stop
$208Delta
mer, ago 26 - mer, set 2
Southwest Logo
10:20 am - 3:05 pm
STL
-
MDW
4h 45m
1 stop
Southwest Logo
7:25 am - 1:05 pm
MDW
-
STL
5h 40m
1 stop
$215Southwest
lun, set 21 - gio, set 24
Delta Logo
6:30 am - 1:00 pm
STL
-
ORD
6h 30m
1 stop
Delta Logo
8:48 am - 1:14 pm
ORD
-
STL
4h 26m
1 stop
$218Delta
mer, lug 1 - gio, ago 6
United Airlines Logo
9:30 am - 11:07 am
STL
-
ORD
1h 37mnonstop
United Airlines Logo
10:00 pm - 11:29 pm
ORD
-
STL
1h 29mnonstop
$236United Airlines
mer, lug 15 - gio, ago 6
American Airlines Logo
8:41 pm - 10:18 pm
STL
-
ORD
1h 37mnonstop
American Airlines Logo
7:04 am - 8:31 am
ORD
-
STL
1h 27mnonstop
$237American Airlines
mar, lug 7 - lun, lug 13
Southwest Logo
5:55 pm - 7:05 pm
STL
-
MDW
1h 10mnonstop
Southwest Logo
6:30 am - 7:45 am
MDW
-
STL
1h 15mnonstop
$237Southwest
mar, lug 7 - sab, lug 11
United Airlines Logo
8:00 am - 9:40 am
COU
-
ORD
1h 40mnonstop
United Airlines Logo
8:40 am - 10:13 am
ORD
-
COU
1h 33mnonstop
$239United Airlines
sab, giu 27 - dom, giu 28
American Airlines Logo
6:32 pm - 8:23 pm
COU
-
ORD
1h 51mnonstop
American Airlines Logo
8:29 am - 10:01 am
ORD
-
COU
1h 32mnonstop
$243American Airlines
ven, lug 3 - dom, lug 5

Frontier flights from Missouri to Illinois

Our best Frontier deals on Missouri to Illinois flight tickets
Frontier
Jul 3
MCI6:16 pmKansas City
14h 36m
1 stop
STL8:52 amLambert-St Louis
Jul 10
STL4:57 pmLambert-St Louis
24h 13m
1 stop
MCI5:10 pmKansas City
$154
Frontier
Jul 6
MCI6:07 pmKansas City
23h 30m
1 stop
STL5:37 pmLambert-St Louis
Jul 10
STL4:57 pmLambert-St Louis
24h 13m
1 stop
MCI5:10 pmKansas City
$179
Frontier
Jun 19
MCI6:16 pmKansas City
14h 36m
1 stop
STL8:52 amLambert-St Louis
Jun 23
STL6:31 pmLambert-St Louis
22h 50m
1 stop
MCI5:21 pmKansas City
$214

American Airlines flights from Missouri to Illinois

Our best American Airlines deals on Missouri to Illinois flight tickets
American Airlines
Jul 7
STL8:41 pmLambert-St Louis
1h 37m
ORD10:18 pmChicago O'Hare Intl
Jul 13
ORD7:04 amChicago O'Hare Intl
1h 27m
STL8:31 amLambert-St Louis
$237
American Airlines
Jul 3
COU6:32 pmColumbia Regional
1h 51m
ORD8:23 pmChicago O'Hare Intl
Jul 5
ORD8:29 amChicago O'Hare Intl
1h 32m
COU10:01 amColumbia Regional
$243
American Airlines
Jun 26
SGF7:53 pmSpringfield-Branson
1h 52m
ORD9:45 pmChicago O'Hare Intl
Jun 28
ORD8:48 pmChicago O'Hare Intl
1h 52m
SGF10:40 pmSpringfield-Branson
$248

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 giugno 5, 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

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

ven 7/3

6:16 pm-8:52 am

1 stop14h 36m

Lambert-St Louis

ven 7/10

4:57 pm-5:10 pm

1 stop24h 13m

$154

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

lun 7/6

6:07 pm-5:37 pm

1 stop23h 30m

Lambert-St Louis

ven 7/10

4:57 pm-5:10 pm

1 stop24h 13m

$179

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

mer 8/26

2:10 pm-8:27 pm

1 stop6h 17m

Chicago O'Hare Intl

mer 9/2

2:12 pm-8:42 pm

1 stop6h 30m

$208

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

lun 9/21

10:20 am-3:05 pm

1 stop4h 45m

Chicago Midway

gio 9/24

7:25 am-1:05 pm

1 stop5h 40m

$215

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

mer 7/1

6:30 am-1:00 pm

1 stop6h 30m

Chicago O'Hare Intl

gio 8/6

8:48 am-1:14 pm

1 stop4h 26m

$218

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

mer 7/15

9:30 am-11:07 am

Nonstop1h 37m

Chicago O'Hare Intl

gio 8/6

10:00 pm-11:29 pm

Nonstop1h 29m

$236

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

mar 7/7

8:41 pm-10:18 pm

Nonstop1h 37m

Chicago O'Hare Intl

lun 7/13

7:04 am-8:31 am

Nonstop1h 27m

$237
Quickest round-trip

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

mar 7/7

5:55 pm-7:05 pm

Nonstop1h 10m

Chicago Midway

sab 7/11

6:30 am-7:45 am

Nonstop1h 15m

$237

ColumbiaChicago

COU - ORD

COUORD

Columbia Regional

sab 6/27

8:00 am-9:40 am

Nonstop1h 40m

Chicago O'Hare Intl

dom 6/28

8:40 am-10:13 am

Nonstop1h 33m

$239

ColumbiaChicago

COU - ORD

COUORD

Columbia Regional

ven 7/3

6:32 pm-8:23 pm

Nonstop1h 51m

Chicago O'Hare Intl

dom 7/5

8:29 am-10:01 am

Nonstop1h 32m

$243

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 $61, 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 $62.

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

The cheapest day to depart from Missouri to Illinois is on a Thursday when prices can be found for as low as $551. Flights from Missouri to Illinois on a Saturday will generally be more expensive and average around $872. 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 $586. Flights at noon are often more expensive with an average ticket price of $998.

What is the cheapest Missouri to Illinois flight route?

Fly from Kirksville Cannon Memorial 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 $310 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 $176 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

$180

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 $180. The best round-trip flight deal from Missouri to Illinois found on momondo in the last 72 hours is $148.
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
ContourPriceFrom $62Free CancellationRating
7.7
41 reviews
Search Contour flights
American AirlinesPriceFrom $97Free CancellationRating
7.1
11,652 reviews
Search American Airlines flights
SouthwestPriceFrom $117Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
United AirlinesPriceFrom $117Free CancellationRating
7.4
9,780 reviews
Search United Airlines flights
FrontierPriceFrom $158Free CancellationRating
5.6
2,912 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.

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1 adult
dom 7/5
dom 7/12
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