$60+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
Aug 31 — Sep 71
Round-trip
1 adult, Economy
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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 August 1, 2026.
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 August 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Mon 8/2411:26 am
MCI
- STL
1 stop5h 56m
Frontier
Deal found 7/27![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:17 pm
STL
- MCI
1 stop21h 48m
Frontier
Mon 8/2411:26 am
MCI
- STL
1 stop5h 56m
Frontier
Deal found 7/30![Frontier logo]()
$143
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Mon 8/319:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$164
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Sat 8/151:30 pm
CGI
- ORD
Nonstop1h 50m
Contour
Deal found 7/27![Contour logo]()
$166
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Thu 8/2011:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/239:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/30![Contour logo]()
$168
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Fri 8/1411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 8/179:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$169
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/239:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/27![Contour logo]()
$170
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Mon 9/1411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 9/219:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$173
This Contour deal was found by Cheapflights users on 7/28. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Tue 9/19:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/28![Contour logo]()
$183
This Frontier deal was found by Cheapflights users on 7/31. 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.
Mon 9/1412:17 pm
STL
- MCI
1 stop9h 28m
Frontier
Mon 9/2110:30 pm
MCI
- STL
1 stop13h 02m
Frontier
Deal found 7/31![Frontier logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:17 pm
STL
- MCI
1 stop21h 48m
Frontier
Fri 9/411:26 am
MCI
- STL
1 stop5h 56m
Frontier
Deal found 7/31![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Thu 9/31:38 pm
MCI
- STL
2 stops25h 50m
Frontier
Deal found 7/30![Frontier logo]()
$200
Best flights from Illinois to MissouriDiscover carefully curated flight deals from Illinois to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 1, 2026.
Discover carefully curated flight deals from Illinois to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 1, 2026.
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Fri 8/1411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 8/179:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$169
This Delta deal was found by Cheapflights users on 7/30. 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.
Thu 8/206:00 am
ORD
- MCI
1 stop5h 41m
Delta
Tue 8/255:40 pm
MCI
- ORD
1 stop4h 07m
Delta
Deal found 7/30![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/289:20 pm
ORD
- COU
Nonstop1h 35m
United Airlines
Sun 8/306:15 am
COU
- ORD
Nonstop1h 39m
United Airlines
Deal found 7/27![United Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 7/30. 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.
Thu 8/202:20 pm
STL
- MCI
Nonstop1h 05m
Southwest
Mon 8/2412:15 pm
MCI
- STL
Nonstop1h 00m
Southwest
Deal found 7/30![Southwest logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/258:10 pm
STL
- MCI
1 stop23h 27m
Frontier
Tue 9/298:32 pm
MCI
- STL
1 stop22h 45m
Frontier
Deal found 7/27![Frontier logo]()
$251
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/239:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/27![Contour logo]()
$170
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Mon 9/1411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 9/219:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$173
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Sat 8/225:00 am
STL
- SGF
1 stop11h 35m
American Airlines
Sat 8/2910:39 am
SGF
- STL
1 stop8h 18m
American Airlines
Deal found 8/1![American Airlines logo]()
$399
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 9/79:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/30![Contour logo]()
$183
This Contour deal was found by Cheapflights users on 7/29. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Tue 9/19:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/29![Contour logo]()
$183
This Southwest deal was found by Cheapflights users on 7/30. 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.
Sat 9/128:25 am
STL
- MCI
1 stop4h 00m
Southwest
Wed 9/168:20 am
MCI
- STL
Nonstop1h 05m
Southwest
Deal found 7/30![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/289:25 pm
ORD
- SGF
Nonstop1h 54m
United Airlines
Fri 9/46:37 pm
SGF
- ORD
Nonstop2h 00m
United Airlines
Deal found 7/31![United Airlines logo]()
$259
This Contour deal was found by Cheapflights users on 7/31. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Wed 9/309:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$183
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:35 am
STL
- MCI
1 stop5h 00m
Southwest
Thu 9/245:00 pm
MCI
- STL
Nonstop1h 05m
Southwest
Deal found 7/29![Southwest logo]()
$247
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:54 am
MDW
- SGF
1 stop7h 23m
Delta
Sat 8/224:00 pm
SGF
- MDW
1 stop6h 36m
Delta
Deal found 7/27![Delta logo]()
$279
This Contour deal was found by Cheapflights users on 7/29. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 8/179:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/29![Contour logo]()
$183
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 10/318:40 am
ORD
- MCI
Nonstop2h 03m
United Airlines
Tue 11/37:36 am
MCI
- ORD
Nonstop1h 47m
United Airlines
Deal found 7/30![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 7/30. 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.
Thu 8/206:05 am
STL
- MCI
1 stop5h 25m
Southwest
Thu 8/202:50 pm
MCI
- STL
1 stop4h 30m
Southwest
Deal found 7/30![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:59 pm
ORD
- SGF
2 stops8h 22m
Delta
Sat 8/224:00 pm
SGF
- ORD
1 stop7h 57m
Delta
Deal found 7/27![Delta logo]()
$284
This Contour deal was found by Cheapflights users on 7/27. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/711:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Wed 9/99:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/27![Contour logo]()
$183
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:59 am
ORD
- SGF
2 stops11h 18m
Delta
Sun 9/66:06 am
SGF
- ORD
1 stop6h 34m
Delta
Deal found 7/27![Delta logo]()
$284
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/99:20 pm
ORD
- COU
Nonstop1h 35m
United Airlines
Sun 10/116:15 am
COU
- ORD
Nonstop1h 38m
United Airlines
Deal found 7/28![United Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:10 am
MDW
- MCI
1 stop6h 05m
Southwest
Thu 9/36:10 pm
MCI
- MDW
1 stop5h 15m
Southwest
Deal found 7/27![Southwest logo]()
$282
This Delta deal was found by Cheapflights users on 7/31. 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.
Thu 10/298:05 am
ORD
- SGF
1 stop6h 35m
Delta
Tue 11/36:00 am
SGF
- ORD
2 stops10h 32m
Delta
Deal found 7/31![Delta logo]()
$284
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:17 am
ORD
- MCI
Nonstop1h 52m
United Airlines
Sun 8/236:00 am
MCI
- ORD
Nonstop1h 54m
United Airlines
Deal found 7/28![United Airlines logo]()
$298
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:05 am
ORD
- SGF
2 stops7h 58m
Delta
Tue 9/153:19 pm
SGF
- ORD
1 stop5h 37m
Delta
Deal found 7/27![Delta logo]()
$284
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:45 am
MDW
- MCI
Nonstop1h 30m
Southwest
Sun 9/205:45 am
MCI
- MDW
Nonstop1h 20m
Southwest
Deal found 7/29![Southwest logo]()
$288
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 8/266:00 am
STL
- SGF
1 stop12h 53m
American Airlines
Wed 9/27:15 am
SGF
- STL
1 stop9h 05m
American Airlines
Deal found 7/29![American Airlines logo]()
$432
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/279:25 pm
ORD
- SGF
Nonstop1h 54m
United Airlines
Thu 9/311:23 am
SGF
- ORD
Nonstop1h 46m
United Airlines
Deal found 7/30![United Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:10 pm
MDW
- SGF
1 stop5h 11m
Delta
Sun 9/66:06 am
SGF
- MDW
2 stops9h 51m
Delta
Deal found 7/28![Delta logo]()
$284
Last-minute flights from Illinois to MissouriDiscover last-minute flight deals from Illinois to Missouri. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Missouri. Data last updated August 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/169:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/28![Contour logo]()
$212
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Fri 8/1411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Mon 8/179:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$169
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Tue 8/189:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/27![Contour logo]()
$166
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/239:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/27![Contour logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Mon 8/2411:26 am
MCI
- STL
1 stop5h 56m
Frontier
Deal found 7/27![Frontier logo]()
$119
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Thu 8/2011:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/239:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/30![Contour logo]()
$168
This Southwest deal was found by Cheapflights users on 7/30. 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.
Thu 8/207:30 am
MDW
- MCI
Nonstop1h 25m
Southwest
Mon 8/2412:15 pm
MCI
- MDW
1 stop3h 10m
Southwest
Deal found 7/30![Southwest logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:17 pm
STL
- MCI
1 stop21h 48m
Frontier
Mon 8/2411:26 am
MCI
- STL
1 stop5h 56m
Frontier
Deal found 7/30![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Thu 9/31:38 pm
MCI
- STL
2 stops25h 50m
Frontier
Deal found 7/30![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:17 pm
STL
- MCI
1 stop21h 48m
Frontier
Fri 9/411:26 am
MCI
- STL
1 stop5h 56m
Frontier
Deal found 7/31![Frontier logo]()
$195
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Mon 8/319:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/31![Contour logo]()
$164
This Contour deal was found by Cheapflights users on 7/28. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Tue 9/19:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 7/28![Contour logo]()
$183
One-way flights from Illinois to MissouriSearch for one-way flight options from Illinois to Missouri. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
Search for one-way flight options from Illinois to Missouri. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Deal found 7/28![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Deal found 7/31![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:17 pm
STL
- MCI
1 stop21h 48m
Frontier
Deal found 7/28![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:17 pm
STL
- MCI
1 stop16h 24m
Frontier
Deal found 7/28![Frontier logo]()
$70
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 7/29![Contour logo]()
$78
This Frontier deal was found by Cheapflights users on 7/30. 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.
Mon 9/2812:17 pm
STL
- MCI
1 stop9h 28m
Frontier
Deal found 7/30![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:10 pm
STL
- MCI
1 stop23h 27m
Frontier
Deal found 7/30![Frontier logo]()
$80
This Booking.com deal was found by Cheapflights users on 7/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 7/27![Contour logo]()
$82
This Contour deal was found by Cheapflights users on 7/30. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 7/30![Contour logo]()
$89
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:07 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 7/27![United Airlines logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:05 am
ORD
- STL
1 stop10h 17m
Frontier
Deal found 7/29![Frontier logo]()
$93
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:15 am
MDW
- STL
Nonstop1h 20m
Southwest
Deal found 7/29![Southwest logo]()
$94
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 August 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $119 (Kiwi.com) |
One-way from | $60 (Trip.com) |
Popular in | April |
Cheapest in | December |
Average price | $270 |
Good round-trip deal | $61 or less |
Good one-way deal | $107 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 August 1, 2026.
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
Cheapest round-trip
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Fri 8/14
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Mon 8/17
9:50 am-11:45 am
Nonstop1h 55m
$169
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Wed 8/19
4:00 pm-5:35 pm
Nonstop1h 35m
Cape Girardeau
Sun 8/23
9:50 am-11:45 am
Nonstop1h 55m
$170
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Mon 9/14
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Mon 9/21
9:50 am-11:45 am
Nonstop1h 55m
$173
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Fri 9/4
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Mon 9/7
9:50 am-11:45 am
Nonstop1h 55m
$183
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Sat 8/29
4:00 pm-5:35 pm
Nonstop1h 35m
Cape Girardeau
Tue 9/1
9:50 am-11:45 am
Nonstop1h 55m
$183
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Sat 9/26
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Wed 9/30
9:50 am-11:45 am
Nonstop1h 55m
$183
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Thu 8/13
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Mon 8/17
9:50 am-11:45 am
Nonstop1h 55m
$183
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Mon 9/7
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Wed 9/9
9:50 am-11:45 am
Nonstop1h 55m
$183
ChicagoKansas City
ORD - MCI
ORDMCI
Chicago O'Hare Intl
Thu 8/20
6:00 am-11:41 am
1 stop5h 41m
Kansas City
Tue 8/25
5:40 pm-9:47 pm
1 stop4h 07m
$227
ChicagoColumbia
ORD - COU
ORDCOU
Chicago O'Hare Intl
Fri 8/28
9:20 pm-10:55 pm
Nonstop1h 35m
Columbia Regional
Sun 8/30
6:15 am-7:54 am
Nonstop1h 39m
$227
Showing 1-10 of 60 resultsSorted by cheapest first
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.
STL-MCI
ORD-CGI
MDW-MCI
ORD-STL
MDW-STL
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
USIL-USMO
STL-MCI
ORD-CGI
MDW-MCI
ORD-STL
What is the cheapest month to book a flight from Illinois to Missouri?
Currently, October is the cheapest month in which you can book a flight from Illinois to Missouri (average of $299). Flying from Illinois to Missouri in June is currently the most expensive (average of $452). 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 August 1, 2026.
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 evening tend to be the most expensive. A flight in the morning could potentially save you up to 15% on airfare.
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 August 1, 2026.
The most flights from USIL to USMO are scheduled on a Friday (72 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).
How much does it cost to fly round-trip from Illinois to Missouri?
Airfare is typical for this route at the moment.
Illinois to Missouri flights typically cost between $252 and $421 in August.The cheapest round-trip price found within the last 5 days was $280 on Frontier (Aug 17-Aug 20).
How far ahead should I book a flight from Illinois to Missouri?
To ensure you get the cheapest price possible for a flight from Illinois to Missouri, you should look to book at least 79 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 July 25, 2026.
Travelers seeking maximum savings on their Illinois to Missouri flight should consider departing on Saturday mornings when fares are most often at their lowest. Wednesday at noon 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 August 1, 2026.
Read reviews from past customers who have flown Southwest,Contour, andUnited 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.
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
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.
Browse thousands of different options on Cheapflights for your next trip
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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.
Complete your trip
Complete your trip to Missouri by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Missouri by cabin class
Find flights from Illinois to Missouri, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Missouri flights
Browse other Illinois and Missouri flight options. Last updated on August 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Missouri
Find the right flight back to Illinois after your stay in Missouri
Illinois to Missouri flights
Consider these flights traveling from Illinois to Missouri.
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 August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$412 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$92 | Average$148 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$323 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$157 | Average$395 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$165 | Average$213 | FlexibilityNo cancel fee | On-timeN/A |