How many flights depart from Missouri to Illinois on average per day?

As of July 2025, there are 120 flights per day flying from Missouri to Illinois. The most common time of day flights depart is 8:00AM, with 50% of flights taking off at noon.

How long is the flight from Missouri to Illinois?

The flight from Missouri to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from St. Louis (a popular airport in Missouri) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 1h 18m on average. If you fly from Columbia (another popular airport in Missouri) to Chicago O'Hare Intl Airport, then the average flight time is 1h 27m.

How many flights depart from Missouri to Illinois on average per week?

As of July 2025, there are 844 flights per week flying from Missouri to Illinois. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

What is the cheapest airline that flies from Missouri to Illinois?

Southwest, American Airlines, and United Airlines are the most popular carriers operating from Missouri to Illinois

What airlines fly to Illinois?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Illinois from Missouri according to our data. American Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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?

As of July 2025, there are 5 operators available to choose from 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.

$46 Cheap Flights from Missouri to Illinois in 2025

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Find the cheapest flights from Missouri to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

11:35 am - 12:40 pmSTL-MDW

1h 05mnonstop

5:40 pm - 6:55 pmMDW-STL

1h 15mnonstop

$91Southwest

Find Deal

Tue, Aug 26 - Wed, Aug 27

7:23 am - 8:45 amSTL-ORD

1h 22mnonstop

7:10 pm - 8:32 pmORD-STL

1h 22mnonstop

$91American Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

7:20 am - 8:30 amSTL-MDW

1h 10mnonstop

11:45 am - 12:55 pmMDW-STL

1h 10mnonstop

$94Southwest

Find Deal

Sat, Sep 6 - Mon, Sep 8

7:23 am - 8:48 amSTL-ORD

1h 25mnonstop

10:34 pm - 11:51 pmORD-STL

1h 17mnonstop

$120American Airlines

Find Deal

Sat, Aug 23 - Sun, Aug 24

3:05 pm - 4:45 pmCGI-ORD

1h 40mnonstop

11:50 am - 1:25 pmORD-CGI

1h 35mnonstop

$122Contour

Find Deal

Tue, Sep 2 - Tue, Sep 9

9:10 am - 10:50 amCGI-ORD

1h 40mnonstop

5:30 pm - 7:05 pmORD-CGI

1h 35mnonstop

$140Contour

Find Deal

Wed, Aug 13 - Wed, Aug 20

5:30 pm - 6:55 pmSTL-ORD

1h 25mnonstop

2:20 pm - 3:44 pmORD-STL

1h 24mnonstop

$149United Airlines

Find Deal

Tue, Aug 26 - Wed, Aug 27

1:00 pm - 4:19 pmSTL-ORD

3h 19m1 stop

8:15 am - 12:00 pmORD-STL

3h 45m1 stop

$166Southern / Mokulele

Find Deal

Fri, Sep 12 - Fri, Sep 19

1:00 pm - 4:32 pmSTL-ORD

3h 32m1 stop

8:15 am - 12:00 pmORD-STL

3h 45m1 stop

$167Southern / Mokulele

Find Deal

Thu, Aug 28 - Thu, Sep 4

3:20 pm - 4:45 pmSTL-ORD

1h 25mnonstop

12:55 pm - 2:19 pmORD-STL

1h 24mnonstop

$178United Airlines

Find Deal

Sat, Sep 6 - Mon, Sep 8

Spirit Airlines flights from Missouri to Illinois

Our best Spirit Airlines deals on Missouri to Illinois flight tickets

Spirit Airlines

Aug 23

MCI6:00 amKansas City

10h 10m

1 stop

ORD4:10 pmChicago O'Hare Intl

Aug 25

ORD6:56 amChicago O'Hare Intl

15h 57m

1 stop

MCI10:53 pmKansas City

$211

Find similar

Spirit Airlines

Aug 27

MCI6:00 amKansas City

10h 10m

1 stop

ORD4:10 pmChicago O'Hare Intl

Sep 3

ORD6:56 amChicago O'Hare Intl

15h 57m

1 stop

MCI10:53 pmKansas City

$212

Find similar

Spirit Airlines

Aug 23

MCI6:00 amKansas City

16h 22m

1 stop

ORD10:22 pmChicago O'Hare Intl

Aug 25

ORD6:56 amChicago O'Hare Intl

15h 57m

1 stop

MCI10:53 pmKansas City

$213

Find similar

American Airlines flights from Missouri to Illinois

Our best American Airlines deals on Missouri to Illinois flight tickets

American Airlines

Sep 13

STL7:23 amLambert-St Louis

1h 22m

ORD8:45 amChicago O'Hare Intl

Sep 20

ORD7:10 pmChicago O'Hare Intl

1h 22m

STL8:32 pmLambert-St Louis

$91

Find similar

American Airlines

Aug 23

STL7:23 amLambert-St Louis

1h 25m

ORD8:48 amChicago O'Hare Intl

Aug 24

ORD10:34 pmChicago O'Hare Intl

1h 17m

STL11:51 pmLambert-St Louis

$120

Find similar

American Airlines

Aug 29

STL7:59 pmLambert-St Louis

1h 31m

ORD9:30 pmChicago O'Hare Intl

Aug 30

ORD6:00 pmChicago O'Hare Intl

1h 21m

STL7:21 pmLambert-St Louis

$121

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Tue 8/26

11:35 am-12:40 pm

Nonstop1h 05m

Chicago Midway

Wed 8/27

5:40 pm-6:55 pm

Nonstop1h 15m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 9/13

7:23 am-8:45 am

Nonstop1h 22m

Chicago O'Hare Intl

Sat 9/20

7:10 pm-8:32 pm

Nonstop1h 22m

$91

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Sat 9/6

7:20 am-8:30 am

Nonstop1h 10m

Chicago Midway

Mon 9/8

11:45 am-12:55 pm

Nonstop1h 10m

$94

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 8/23

7:23 am-8:48 am

Nonstop1h 25m

Chicago O'Hare Intl

Sun 8/24

10:34 pm-11:51 pm

Nonstop1h 17m

$120

Cape GirardeauChicago

CGI - ORD

CGIORD

Cape Girardeau

Tue 9/2

3:05 pm-4:45 pm

Nonstop1h 40m

Chicago O'Hare Intl

Tue 9/9

11:50 am-1:25 pm

Nonstop1h 35m

$122

Cape GirardeauChicago

CGI - ORD

CGIORD

Cape Girardeau

Wed 8/13

9:10 am-10:50 am

Nonstop1h 40m

Chicago O'Hare Intl

Wed 8/20

5:30 pm-7:05 pm

Nonstop1h 35m

$140

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 8/26

5:30 pm-6:55 pm

Nonstop1h 25m

Chicago O'Hare Intl

Wed 8/27

2:20 pm-3:44 pm

Nonstop1h 24m

$149

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 9/12

1:00 pm-4:19 pm

1 stop3h 19m

Chicago O'Hare Intl

Fri 9/19

8:15 am-12:00 pm

1 stop3h 45m

$166

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 8/28

1:00 pm-4:32 pm

1 stop3h 32m

Chicago O'Hare Intl

Thu 9/4

8:15 am-12:00 pm

1 stop3h 45m

$167

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 9/6

3:20 pm-4:45 pm

Nonstop1h 25m

Chicago O'Hare Intl

Mon 9/8

12:55 pm-2:19 pm

Nonstop1h 24m

$178

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $158, 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 $193.

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 $687. Flights from Missouri to Illinois on a Monday will generally be more expensive and average around $922. 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 $612. Flights at noon are often more expensive with an average ticket price of $1,238.

What is the cheapest Missouri to Illinois flight route?

Fly from Lambert-St Louis to Chicago Midway for the best Missouri - Illinois flight prices

How far in advance should I book a flight 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 $269 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 $183 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	$46
Fastest flight time	1h 05m
Direct flights	Every day
Airports in Illinois	3 airports

The best one-way flight to Illinois from Missouri in the past 72 hours is $46. The best round-trip flight deal from Missouri to Illinois found on momondo in the last 72 hours is $91.

The fastest flight from Missouri to Illinois takes 1h 05m

Direct flights go from Missouri to Illinois every day.

There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

Search flight deals

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?
As of July 2025, there are 5 operators available to choose from 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?
Based on momondo bookings for flights between Missouri and Illinois, the leading plane model is Airbus A319, making up 12.81% of the total bookings. Other popular models include Boeing 737-800 with 9.86%, Embraer 175 with 9.08%, and Boeing 737 MAX 8 with 8.93%.

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
Contour	PriceFrom $86	Free Cancellation	Rating 7.1 32 reviews	Search Contour flights
American Airlines	PriceFrom $115	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southern / Mokulele	PriceFrom $129	Free Cancellation	Rating 6.4 26 reviews	Search Southern / Mokulele flights
United Airlines	PriceFrom $130	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Southwest	PriceFrom $168	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Illinois

Popular cities in Illinois

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Flights to San Franciscofrom $49

Flights to Washington, D.C.from $49

Flights to Bostonfrom $77

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Flights to Seattlefrom $93

Cheap flights from Missouri to Illinois 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 Missouri to Illinois 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.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Missouri to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Spirit Airlines flights from Missouri to Illinois

Our best Spirit Airlines deals on Missouri to Illinois flight tickets

American Airlines flights from Missouri to Illinois

Our best American Airlines deals on Missouri to Illinois flight tickets

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Use the filters below to find and compare flights from Missouri to Illinois that are best for you.

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?

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

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 $612. Flights at noon are often more expensive with an average ticket price of $1,238.

What is the cheapest Missouri to Illinois flight route?

Fly from Lambert-St Louis to Chicago Midway for the best Missouri - Illinois flight prices

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

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.

What is the cheapest airline that flies from Missouri to Illinois?

Southwest, American Airlines, and United Airlines are the most popular carriers operating from Missouri to Illinois

What airlines fly to Illinois?

How many flights depart from Missouri to Illinois on average per day?

As of July 2025, there are 120 flights per day flying from Missouri to Illinois. The most common time of day flights depart is 8:00AM, with 50% of flights taking off at noon.

How many flights depart from Missouri to Illinois on average per week?

As of July 2025, there are 844 flights per week flying from Missouri to Illinois. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

How long is the flight from 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

Fastest flight time

Direct flights

Airports in Illinois

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

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?

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

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

Why use momondo?

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

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

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

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

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo