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Missouri

$73+ Cheap flights from Illinois to Missouri

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
mai 4 — mai 111
dom 5/4
dom 5/11
1 adult, Economy
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Cheap flight deals from Illinois to Missouri

Keep the following information in mind while searching for Illinois to Missouri flight deals. Data was last updated abril 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$135
(Trip.com)

One-way from

$73
(Southern / Mokulele)

Popular in

April

Cheapest in

August

Average price

$356

Good round-trip deal

$124 or less

Good one-way deal

$61 or less
Provider with most accurate pricing for Chicago (CHI)-Kansas City flight deals.
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From Illinois to Missouri
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One-way flight from Illinois to Missouri
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Highest demand for flights based on searches. 7% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Illinois to Missouri.
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Price to beat on a one-way flight from Illinois to Missouri.
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Find flight deals from Illinois to Missouri

Cheapest flights from Illinois to Missouri
Explore the most affordable flight options available from Illinois to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 29, 2025.

This Trip.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 6/135:00 pmORD - CGI
Nonstop1h 35mContour
sex 6/208:40 amCGI - ORD
Nonstop1h 40mContour
Deal found 4/29$135
This Southern / Mokulele deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southern / Mokulele is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/238:25 amORD - STL
1 stop11h 45mSouthern / Mokulele
ter 5/2712:15 pmSTL - ORD
1 stop19h 25mSouthern / Mokulele
Deal found 4/29$140
This Flightnetwork deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 6/146:20 amMDW - STL
1 stop7h 47mFrontier
sáb 6/212:52 pmSTL - MDW
1 stop7h 36mFrontier
Deal found 4/29$163
This Frontier deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 6/295:01 amORD - STL
1 stop8h 39mFrontier
sáb 7/52:52 pmSTL - ORD
1 stop9h 30mFrontier
Deal found 4/29$182
This Orbitz deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/154:15 pmORD - STL
1 stop7h 51mMultiple Airlines
seg 5/191:00 pmSTL - ORD
1 stop3h 32mMultiple Airlines
Deal found 4/28$188
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/2210:00 pmORD - SGF
Nonstop1h 46mAmerican Airlines
dom 5/257:15 amSGF - ORD
Nonstop1h 39mAmerican Airlines
Deal found 4/29$189
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 6/1312:45 pmORD - SGF
Nonstop1h 46mUnited Airlines
sex 6/206:39 pmSGF - ORD
Nonstop1h 46mUnited Airlines
Deal found 4/29$194
This Frontier deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/306:35 amMDW - MCI
1 stop7h 12mFrontier
qua 6/43:07 pmMCI - MDW
1 stop7h 31mFrontier
Deal found 4/29$208
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/288:40 pmMDW - MCI
Nonstop1h 30mSouthwest
sáb 5/315:45 amMCI - MDW
Nonstop1h 25mSouthwest
Deal found 4/28$209
This American Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 5/275:19 amSTL - MCI
1 stop5h 04mAmerican Airlines
ter 6/35:30 amMCI - STL
1 stop4h 19mAmerican Airlines
Deal found 4/27$209
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 8/225:55 pmORD - SGF
1 stop4h 35mDelta
seg 8/256:45 pmSGF - ORD
1 stop5h 10mDelta
Deal found 4/29$209
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/2810:15 pmORD - MCI
Nonstop1h 39mAmerican Airlines
sáb 5/315:30 amMCI - ORD
Nonstop1h 41mAmerican Airlines
Deal found 4/29$209

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated abril 29, 2025.
Use the filters below to find and compare flights from Illinois to Missouri that are best for you.

Fly from

Illinois

Fly to

Missouri

Route

Depart

Return

Price

ChicagoCape Girardeau

ORD - CGI

ORDCGI

Chicago O'Hare Intl

sex 6/13

5:00 pm-6:35 pm

Nonstop1h 35m

Cape Girardeau

sex 6/20

8:40 am-10:20 am

Nonstop1h 40m

$135

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sex 5/23

8:25 am-8:10 pm

1 stop11h 45m

Lambert-St Louis

ter 5/27

12:15 pm-7:40 am

1 stop19h 25m

$140

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

dom 6/29

6:20 am-1:40 pm

1 stop7h 20m

Lambert-St Louis

sáb 7/5

2:52 pm-10:35 pm

1 stop7h 43m

$182

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

dom 6/29

5:01 am-1:40 pm

1 stop8h 39m

Lambert-St Louis

sáb 7/5

2:52 pm-12:22 am

1 stop9h 30m

$182

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

qui 5/15

4:15 pm-12:06 am

1 stop7h 51m

Lambert-St Louis

seg 5/19

1:00 pm-4:32 pm

1 stop3h 32m

$188

ChicagoSpringfield

ORD - SGF

ORDSGF

Chicago O'Hare Intl

qui 5/22

10:00 pm-11:46 pm

Nonstop1h 46m

Springfield-Branson

dom 5/25

7:15 am-8:54 am

Nonstop1h 39m

$189

ChicagoSpringfield

ORD - SGF

ORDSGF

Chicago O'Hare Intl

sex 6/13

12:45 pm-2:31 pm

Nonstop1h 46m

Springfield-Branson

sex 6/20

6:39 pm-8:25 pm

Nonstop1h 46m

$194

ChicagoKansas City

MDW - MCI

MDWMCI

Chicago Midway

sex 5/30

6:35 am-1:47 pm

1 stop7h 12m

Kansas City

qua 6/4

3:07 pm-10:38 pm

1 stop7h 31m

$208

ChicagoKansas City

MDW - MCI

MDWMCI

Chicago Midway

qua 5/28

8:40 pm-10:10 pm

Nonstop1h 30m

Kansas City

sáb 5/31

5:45 am-7:10 am

Nonstop1h 25m

$209

ChicagoSpringfield

ORD - SGF

ORDSGF

Chicago O'Hare Intl

sex 8/22

5:55 pm-10:30 pm

1 stop4h 35m

Springfield-Branson

seg 8/25

6:45 pm-11:55 pm

1 stop5h 10m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Missouri

What is the cheapest month to book a flight from Illinois to Missouri?

Currently, August is the cheapest month in which you can book a flight from Illinois to Missouri (average of $311). Flying from Illinois to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to MO?

Find hourly flight availability from Illinois to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Missouri as you normally would.

Weekly flight availability from Illinois to Missouri

Explore weekly flight availability from Illinois to Missouri. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated abril 29, 2025.

The most flights from USIL to USMO are scheduled on a Tuesday (61 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).

Rainfall in Missouri by month

Plan your trip to Missouri by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Missouri ranges from 1.1 - 5.2 inches per month. May is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Missouri when rainfall is around 1.1 in.

Temperature in Missouri by month

Plan your trip to Missouri by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Missouri, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated abril 29, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Illinois to Missouri by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Allegiant Air
7.3
Good
734 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Illinois to Missouri one-way?

    The cheapest airline one-way is Southern / Mokulele, with whom users have recently found tickets for as low as $73. However, be on the lookout for offers from Frontier and Contour, as they are both options that can get you from Illinois to Missouri for a low price.

  • Can I find deals for flights from Illinois to Missouri that include hotel bookings?

    Yes. In addition to deals on Illinois to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Missouri?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Missouri.

  • Can I find deals for business class flights from Illinois to Missouri?

    Yes. Cheapflights offers flight deals from Illinois to Missouri by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Missouri?

    Currently, August is the cheapest month in which you can book a flight from Illinois to Missouri (average of $311). Flying from Illinois to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Illinois to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Illinois to Missouri

Discover the top 5 airlines that operate flights from Illinois to Missouri. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
ContourCheapest$88Average$164FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$115Average$327FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$116Average$334FlexibilityNo cancel feeOn-time63%
Southern / MokuleleCheapest$117Average$176FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$141Average$321FlexibilityNo cancel feeOn-time69%

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