$54+ 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 12/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MCI
Jan 17 — Jan 241
1 adult, Economy
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Missouri
Cheapest flights from Illinois to MissouriExplore 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 December 18, 2025.
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 December 18, 2025.
This Mytrip deal was found by Cheapflights users on 12/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:50 amORD - CGI
Nonstop1h 35mContour
Sun 1/49:30 amCGI - ORD
Nonstop1h 40mContour
Deal found 12/16![Contour logo]()
$103
This Mytrip deal was found by Cheapflights users on 12/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:50 amORD - CGI
Nonstop1h 35mContour
Sat 1/39:30 amCGI - ORD
Nonstop1h 40mContour
Deal found 12/17![Contour logo]()
$106
This Booking.com deal was found by Cheapflights users on 12/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:50 amORD - CGI
Nonstop1h 35mContour
Fri 1/29:30 amCGI - ORD
Nonstop1h 40mContour
Deal found 12/17![Contour logo]()
$108
This American Airlines deal was found by Cheapflights users on 12/18. 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.
Wed 12/317:14 amORD - STL
Nonstop1h 34mAmerican Airlines
Tue 1/136:00 amSTL - ORD
Nonstop1h 27mAmerican Airlines
Deal found 12/18![American Airlines logo]()
$188
This Delta deal was found by Cheapflights users on 12/17. 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.
Wed 12/315:31 pmORD - STL
1 stop6h 07mDelta
Tue 1/136:00 amSTL - ORD
1 stop4h 59mDelta
Deal found 12/17![Delta logo]()
$204
This Gotogate deal was found by Cheapflights users on 12/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2111:50 amORD - CGI
Nonstop1h 35mContour
Sun 12/289:30 amCGI - ORD
Nonstop1h 40mContour
Deal found 12/15![Contour logo]()
$207
This Frontier deal was found by Cheapflights users on 12/15. 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.
Wed 12/3111:23 amORD - STL
1 stop11h 10mFrontier
Thu 1/110:42 amSTL - ORD
1 stop7h 51mFrontier
Deal found 12/15![Frontier logo]()
$208
This Mytrip deal was found by Cheapflights users on 12/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1911:50 amORD - CGI
Nonstop1h 35mContour
Tue 12/239:30 amCGI - ORD
Nonstop1h 40mContour
Deal found 12/15![Contour logo]()
$214
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/243:00 pmORD - STL
Nonstop1h 27mUnited Airlines
Thu 12/259:55 amSTL - ORD
Nonstop1h 35mUnited Airlines
Deal found 12/16![United Airlines logo]()
$215
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/247:07 amORD - STL
Nonstop1h 28mAmerican Airlines
Thu 12/259:08 amSTL - ORD
Nonstop1h 27mAmerican Airlines
Deal found 12/16![American Airlines logo]()
$226
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/255:00 amORD - MCI
1 stop6h 26mAmerican Airlines
Wed 12/315:12 amMCI - ORD
Nonstop1h 47mAmerican Airlines
Deal found 12/16![American Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Tue 12/233:50 pmORD - COU
Nonstop1h 35mUnited Airlines
Wed 12/318:05 amCOU - ORD
Nonstop1h 46mUnited Airlines
Deal found 12/16![United Airlines logo]()
$239
Find flight deals from Illinois to Missouri
Keep the following information in mind while searching for Illinois to Missouri flight deals. Data was last updated December 18, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $103 (Mytrip) |
One-way from | $54 (Booking.com) |
Popular in | October |
Cheapest in | November |
Average price | $270 |
Good round-trip deal | $61 or less |
Good one-way deal | $49 or less |
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 December 18, 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
Wed 12/31
11:50 am-1:25 pm
Nonstop1h 35m
Cape Girardeau
Sun 1/4
9:30 am-11:10 am
Nonstop1h 40m
$103
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Tue 12/30
11:50 am-1:25 pm
Nonstop1h 35m
Cape Girardeau
Sat 1/3
9:30 am-11:10 am
Nonstop1h 40m
$106
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Mon 12/29
11:50 am-1:25 pm
Nonstop1h 35m
Cape Girardeau
Fri 1/2
9:30 am-11:10 am
Nonstop1h 40m
$108
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Thu 1/8
5:50 am-2:48 pm
1 stop8h 58m
Lambert-St Louis
Mon 1/12
5:11 pm-1:13 pm
1 stop20h 02m
$139
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Mon 2/2
11:50 am-1:25 pm
Nonstop1h 35m
Cape Girardeau
Tue 2/3
9:30 am-11:10 am
Nonstop1h 40m
$139
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Tue 1/13
5:57 pm-6:51 am
1 stop12h 54m
Lambert-St Louis
Tue 1/20
5:42 pm-1:13 pm
1 stop19h 31m
$141
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Thu 2/19
11:50 am-1:25 pm
Nonstop1h 35m
Cape Girardeau
Tue 2/24
9:30 am-11:10 am
Nonstop1h 40m
$151
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Wed 1/14
2:35 pm-4:03 pm
Nonstop1h 28m
Lambert-St Louis
Wed 1/21
9:57 am-11:32 am
Nonstop1h 35m
$153
St. LouisKansas City
STL - MCI
STLMCI
Lambert-St Louis
Wed 1/14
2:20 pm-7:50 pm
1 stop5h 30m
Kansas City
Wed 1/21
11:00 am-4:50 pm
2 stops5h 50m
$158
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Tue 2/17
7:40 pm-9:05 pm
Nonstop1h 25m
Lambert-St Louis
Sat 2/21
7:41 am-9:10 am
Nonstop1h 29m
$162
Showing 1-10 of 60 results
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 $77). Flying from Illinois to Missouri in February is currently the most expensive (average of $160). 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 December 18, 2025.
One of the essential ways to save on airfare from Illinois to Missouri is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 27% on airfare.
What is the cheapest day to fly from Illinois to Missouri?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Missouri. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Illinois to Missouri flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 December 18, 2025.
Read reviews from past customers who have flown Southwest, Contour, and United Airlines from Illinois to Missouri. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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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.
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 December 18, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$346 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$105 | Average$182 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$115 | Average$391 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$144 | Average$325 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$145 | Average$213 | FlexibilityNo cancel fee | On-timeN/A |