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Cheap flights from Illinois to Missouri from $46

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 9/30. 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

Southwest Logo
6:35 am - 7:45 amMDW-STL
1h 10mnonstop
Southwest Logo
1:55 pm - 3:05 pmSTL-MDW
1h 10mnonstop
$91Southwest
Find Deal
sáb., sep. 20 - sáb., oct. 4
United Airlines Logo
1:05 pm - 2:33 pmORD-STL
1h 28mnonstop
United Airlines Logo
6:35 am - 8:05 amSTL-ORD
1h 30mnonstop
$91United Airlines
Find Deal
mié., ago. 27 - mié., sep. 3
American Airlines Logo
8:31 pm - 9:53 pmORD-STL
1h 22mnonstop
American Airlines Logo
6:10 am - 7:30 amSTL-ORD
1h 20mnonstop
$92American Airlines
Find Deal
sáb., sep. 13 - sáb., sep. 20
Southwest Logo
7:40 am - 8:50 amMDW-STL
1h 10mnonstop
Southwest Logo
1:55 pm - 3:05 pmSTL-MDW
1h 10mnonstop
$94Southwest
Find Deal
jue., oct. 16 - sáb., oct. 18
United Airlines Logo
2:20 pm - 3:44 pmORD-STL
1h 24mnonstop
United Airlines Logo
3:20 pm - 4:45 pmSTL-ORD
1h 25mnonstop
$119United Airlines
Find Deal
mié., sep. 17 - sáb., sep. 20
American Airlines Logo
6:00 pm - 7:21 pmORD-STL
1h 21mnonstop
American Airlines Logo
7:23 am - 8:48 amSTL-ORD
1h 25mnonstop
$120American Airlines
Find Deal
sáb., ago. 23 - dom., ago. 24
Southern / Mokulele Logo
8:15 am - 12:00 pmORD-STL
3h 45m1 stop
Southern / Mokulele Logo
9:20 am - 4:19 pmSTL-ORD
6h 59m1 stop
$167Southern / Mokulele
Find Deal
vie., sep. 12 - vie., sep. 19
Southern / Mokulele Logo
1:10 pm - 12:10 pmORD-STL
23h 00m1 stop
Southern / Mokulele Logo
5:15 pm - 7:37 amSTL-ORD
14h 22m1 stop
$168Southern / Mokulele
Find Deal
sáb., ago. 23 - dom., ago. 24
Delta Logo
9:20 am - 4:14 pmMDW-STL
6h 54m1 stop
Delta Logo
3:55 pm - 9:10 pmSTL-MDW
5h 15m1 stop
$177Delta
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sáb., sep. 20 - sáb., oct. 4
Delta Logo
9:47 am - 2:41 pmORD-STL
4h 54m1 stop
Delta Logo
5:11 pm - 11:56 pmSTL-ORD
6h 45m1 stop
$177Delta
Find Deal
mar., ago. 19 - jue., ago. 21

Delta flights from Illinois to Missouri

Our best Delta deals on Illinois to Missouri flight tickets
Delta
Aug 19
ORD9:47 amChicago O'Hare Intl
4h 54m
1 stop
STL2:41 pmLambert-St Louis
Aug 21
STL5:11 pmLambert-St Louis
6h 45m
1 stop
ORD11:56 pmChicago O'Hare Intl
$177
Find similar
Delta
Aug 23
MDW9:31 amChicago Midway
9h 36m
2 stops
STL7:07 pmLambert-St Louis
Aug 24
STL5:11 pmLambert-St Louis
4h 33m
1 stop
MDW9:44 pmChicago Midway
$181
Find similar
Delta
Aug 23
ORD2:25 pmChicago O'Hare Intl
8h 59m
2 stops
STL11:24 pmLambert-St Louis
Aug 24
STL5:11 pmLambert-St Louis
6h 45m
1 stop
ORD11:56 pmChicago O'Hare Intl
$182
Find similar

Southwest flights from Illinois to Missouri

Our best Southwest deals on Illinois to Missouri flight tickets
Southwest
Sep 20
MDW6:35 amChicago Midway
1h 10m
STL7:45 amLambert-St Louis
Oct 4
STL1:55 pmLambert-St Louis
1h 10m
MDW3:05 pmChicago Midway
$91
Find similar
Southwest
Oct 16
MDW7:40 amChicago Midway
1h 10m
STL8:50 amLambert-St Louis
Oct 18
STL1:55 pmLambert-St Louis
1h 10m
MDW3:05 pmChicago Midway
$94
Find similar
Southwest
Aug 27
STL10:25 amLambert-St Louis
1h 05m
MCI11:30 amKansas City
Sep 3
MCI4:45 pmKansas City
1h 05m
STL5:50 pmLambert-St Louis
$97
Find similar

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 julio 31, 2025.
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

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

sáb. 9/20

6:35 am-7:45 am

Nonstop1h 10m

Lambert-St Louis

sáb. 10/4

1:55 pm-3:05 pm

Nonstop1h 10m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 8/27

1:05 pm-2:33 pm

Nonstop1h 28m

Lambert-St Louis

mié. 9/3

6:35 am-8:05 am

Nonstop1h 30m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 9/13

8:31 pm-9:53 pm

Nonstop1h 22m

Lambert-St Louis

sáb. 9/20

6:10 am-7:30 am

Nonstop1h 20m

$92

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

jue. 10/16

7:40 am-8:50 am

Nonstop1h 10m

Lambert-St Louis

sáb. 10/18

1:55 pm-3:05 pm

Nonstop1h 10m

$94

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 9/17

2:20 pm-3:44 pm

Nonstop1h 24m

Lambert-St Louis

sáb. 9/20

3:20 pm-4:45 pm

Nonstop1h 25m

$119

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 8/23

6:00 pm-7:21 pm

Nonstop1h 21m

Lambert-St Louis

dom. 8/24

7:23 am-8:48 am

Nonstop1h 25m

$120

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 9/12

8:15 am-12:00 pm

1 stop3h 45m

Lambert-St Louis

vie. 9/19

9:20 am-4:19 pm

1 stop6h 59m

$167

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 8/23

1:10 pm-12:10 pm

1 stop23h 00m

Lambert-St Louis

dom. 8/24

5:15 pm-7:37 am

1 stop14h 22m

$168

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

sáb. 9/20

9:20 am-4:14 pm

1 stop6h 54m

Lambert-St Louis

sáb. 10/4

3:55 pm-9:10 pm

1 stop5h 15m

$177

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mar. 8/19

9:47 am-2:41 pm

1 stop4h 54m

Lambert-St Louis

jue. 8/21

5:11 pm-11:56 pm

1 stop6h 45m

$177

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, September 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 $220. If you aren’t able to travel to Missouri during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $241.

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

The cheapest day to depart from Illinois to Missouri is on a Friday when prices can be found for as low as $263. Flights from Illinois to Missouri on a Monday will generally be more expensive and average around $437. 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 in the evening. momondo users have found flights departing from Illinois to Missouri in the evening for as low as $291. 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 morning, with an average ticket price of $326. Departure times in the morning 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 Midway 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 $271 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 $90 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

$46

Fastest flight time

1h 05m

Direct flights

Every day

Airports in Missouri

3 airports
The best one-way flight to Missouri from Illinois in the past 72 hours is $46. The best round-trip flight deal from Illinois to Missouri found on momondo in the last 72 hours is $91.
The fastest flight from Illinois to Missouri takes 1h 05m
Direct flights go from Illinois to Missouri every day.
There are 3 airports near Missouri: Kansas City (MCI), Columbia Regional (COU), 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
4,246 reviews
Search Southwest flights
ContourPriceFrom $88Free CancellationRating
7.1
32 reviews
Search Contour flights
American AirlinesPriceFrom $115Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Southern / MokulelePriceFrom $118Free CancellationRating
6.4
26 reviews
Search Southern / Mokulele flights
United AirlinesPriceFrom $152Free CancellationRating
7.4
8,900 reviews
Search United Airlines 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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