$55+ Cheap flights from Missouri to Illinois
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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — ORD
Jul 20 — Jul 271
Round-trip
1 adult, Economy
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Cheapest flights from Missouri to IllinoisExplore the most affordable flight options available from Missouri to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 20, 2026.
Explore the most affordable flight options available from Missouri to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 20, 2026.
This Gotogate deal was found by Cheapflights users on 6/19. 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 7/199:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Wed 7/223:55 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/19![Contour logo]()
$159
This Mytrip deal was found by Cheapflights users on 6/17. 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.
Wed 7/221:30 pm
CGI
- ORD
Nonstop1h 45m
Contour
Mon 8/1011:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/17![Contour logo]()
$160
This Gotogate deal was found by Cheapflights users on 6/19. 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.
Tue 8/49:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Thu 8/611:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/19![Contour logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 7/156:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Tue 7/216:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/19![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Fri 8/74:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Deal found 6/16![Frontier logo]()
$178
This Contour deal was found by Cheapflights users on 6/19. 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 7/41:30 pm
CGI
- ORD
Nonstop1h 45m
Contour
Wed 7/83:55 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/19![Contour logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Wed 7/227:03 pm
STL
- MCI
1 stop20h 44m
Frontier
Deal found 6/17![Frontier logo]()
$196
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:30 am
STL
- MDW
1 stop6h 09m
Delta
Sat 8/291:27 pm
MDW
- STL
1 stop3h 47m
Delta
Deal found 6/16![Delta logo]()
$218
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:10 pm
STL
- ORD
1 stop6h 20m
Delta
Mon 8/311:59 pm
ORD
- STL
1 stop6h 43m
Delta
Deal found 6/16![Delta logo]()
$218
This Contour deal was found by Cheapflights users on 6/15. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:40 am
CGI
- ORD
Nonstop1h 55m
Contour
Wed 10/2111:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/15![Contour logo]()
$219
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:30 am
STL
- MDW
1 stop6h 09m
Delta
Wed 9/21:51 pm
MDW
- STL
1 stop9h 35m
Delta
Deal found 6/16![Delta logo]()
$219
This United Airlines deal was found by Cheapflights users on 6/16. 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 8/258:50 am
STL
- ORD
Nonstop1h 36m
United Airlines
Mon 8/312:07 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 6/16![United Airlines logo]()
$222
Best flights from Missouri to IllinoisDiscover carefully curated flight deals from Missouri to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 20, 2026.
Discover carefully curated flight deals from Missouri to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 20, 2026.
This Mytrip deal was found by Cheapflights users on 6/17. 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.
Wed 7/221:30 pm
CGI
- ORD
Nonstop1h 45m
Contour
Mon 8/1011:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/17![Contour logo]()
$160
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:30 am
STL
- MDW
1 stop6h 09m
Delta
Sat 8/291:27 pm
MDW
- STL
1 stop3h 47m
Delta
Deal found 6/16![Delta logo]()
$218
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Sat 8/296:54 pm
STL
- ORD
Nonstop1h 36m
United Airlines
Tue 9/12:07 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 6/16![United Airlines logo]()
$222
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:05 am
STL
- MDW
Nonstop1h 10m
Southwest
Tue 9/18:30 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 6/16![Southwest logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:33 pm
STL
- ORD
1 stop14h 30m
Frontier
Sun 8/309:48 pm
ORD
- STL
1 stop21h 35m
Frontier
Deal found 6/15![Frontier logo]()
$274
This Contour deal was found by Cheapflights users on 6/19. 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 7/41:30 pm
CGI
- ORD
Nonstop1h 45m
Contour
Wed 7/83:55 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/19![Contour logo]()
$178
This Contour deal was found by Cheapflights users on 6/20. 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.
Sun 7/59:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Thu 7/912:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/20![Contour logo]()
$178
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/183:45 pm
STL
- MDW
Nonstop1h 05m
Southwest
Sun 8/238:25 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 6/15![Southwest logo]()
$223
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:00 am
COU
- ORD
Nonstop1h 40m
United Airlines
Tue 8/119:20 pm
ORD
- COU
Nonstop1h 35m
United Airlines
Deal found 6/15![United Airlines logo]()
$239
This KAYAK deal was found by Cheapflights users on 6/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/205:30 am
MCI
- ORD
Nonstop2h 01m
American Airlines
Thu 7/237:00 am
ORD
- MCI
1 stop6h 58m
American Airlines
Deal found 6/19![American Airlines logo]()
$478
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:33 am
STL
- ORD
1 stop5h 44m
Delta
Mon 8/311:59 pm
ORD
- STL
1 stop6h 43m
Delta
Deal found 6/16![Delta logo]()
$247
This Southwest deal was found by Cheapflights users on 6/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/53:45 pm
STL
- MDW
Nonstop1h 05m
Southwest
Fri 8/712:05 pm
MDW
- STL
1 stop5h 50m
Southwest
Deal found 6/17![Southwest logo]()
$233
This United Airlines deal was found by Cheapflights users on 6/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:00 am
COU
- ORD
Nonstop1h 40m
United Airlines
Sun 7/198:40 am
ORD
- COU
Nonstop1h 33m
United Airlines
Deal found 6/17![United Airlines logo]()
$239
This Contour deal was found by Cheapflights users on 6/17. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Tue 9/2211:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/17![Contour logo]()
$219
This Delta deal was found by Cheapflights users on 6/20. 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.
Fri 10/166:45 am
STL
- ORD
1 stop5h 52m
Delta
Sat 12/57:05 am
ORD
- STL
1 stop6h 15m
Delta
Deal found 6/20![Delta logo]()
$257
This Contour deal was found by Cheapflights users on 6/15. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:40 am
CGI
- ORD
Nonstop1h 55m
Contour
Wed 10/2111:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/15![Contour logo]()
$219
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 8/276:00 am
STL
- ORD
Nonstop1h 33m
United Airlines
Mon 8/319:30 pm
ORD
- STL
Nonstop1h 29m
United Airlines
Deal found 6/16![United Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 6/20. 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.
Fri 8/212:20 pm
STL
- MDW
Nonstop1h 05m
Southwest
Mon 8/243:10 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 6/20![Southwest logo]()
$266
This Delta deal was found by Cheapflights users on 6/19. 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 8/2611:38 am
SGF
- ORD
1 stop7h 11m
Delta
Sat 8/298:05 am
ORD
- SGF
1 stop7h 05m
Delta
Deal found 6/19![Delta logo]()
$269
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Thu 8/611:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/16![Contour logo]()
$233
This Delta deal was found by Cheapflights users on 6/17. 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.
Fri 8/213:20 pm
SGF
- ORD
1 stop5h 35m
Delta
Mon 8/245:30 am
ORD
- SGF
1 stop5h 23m
Delta
Deal found 6/17![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 6/19. 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 10/96:15 am
COU
- ORD
Nonstop1h 38m
United Airlines
Mon 10/129:20 pm
ORD
- COU
Nonstop1h 35m
United Airlines
Deal found 6/19![United Airlines logo]()
$271
This Southwest deal was found by Cheapflights users on 6/19. 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 7/151:45 pm
MCI
- STL
Nonstop1h 05m
Southwest
Tue 7/218:35 am
STL
- MCI
Nonstop1h 05m
Southwest
Deal found 6/19![Southwest logo]()
$275
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:39 pm
SGF
- ORD
1 stop6h 20m
Delta
Tue 10/69:30 am
ORD
- SGF
1 stop5h 20m
Delta
Deal found 6/15![Delta logo]()
$269
This Mytrip deal was found by Cheapflights users on 6/20. 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 7/239:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Sat 7/253:55 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/20![Contour logo]()
$245
This Southwest deal was found by Cheapflights users on 6/19. 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.
Tue 7/211:45 pm
MCI
- STL
Nonstop1h 05m
Southwest
Wed 7/222:10 pm
STL
- MCI
Nonstop1h 05m
Southwest
Deal found 6/19![Southwest logo]()
$275
This United Airlines deal was found by Cheapflights users on 6/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/238:54 am
JLN
- ORD
Nonstop1h 58m
United Airlines
Tue 7/2811:32 am
ORD
- JLN
Nonstop1h 50m
United Airlines
Deal found 6/17![United Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 6/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:15 pm
STL
- MDW
1 stop4h 45m
Southwest
Sun 8/301:30 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 6/17![Southwest logo]()
$276
This Contour deal was found by Cheapflights users on 6/19. 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.
Sun 9/139:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Thu 9/1711:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/19![Contour logo]()
$253
This United Airlines deal was found by Cheapflights users on 6/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1710:49 am
COU
- ORD
Nonstop1h 41m
United Airlines
Mon 7/2010:00 pm
ORD
- COU
Nonstop1h 33m
United Airlines
Deal found 6/17![United Airlines logo]()
$306
Last-minute flights from Missouri to IllinoisDiscover last-minute flight deals from Missouri to Illinois. Data last updated June 20, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Illinois. Data last updated June 20, 2026 and is based on user searches.
This Contour deal was found by Cheapflights users on 6/19. 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 7/41:30 pm
CGI
- ORD
Nonstop1h 45m
Contour
Wed 7/83:55 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/19![Contour logo]()
$178
This Frontier deal was found by Cheapflights users on 6/19. 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.
Fri 7/107:10 pm
STL
- ORD
1 stop10h 27m
Frontier
Wed 8/57:15 am
ORD
- STL
1 stop10h 50m
Frontier
Deal found 6/19![Frontier logo]()
$235
This Southwest deal was found by Cheapflights users on 6/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/114:00 pm
STL
- MDW
Nonstop1h 05m
Southwest
Wed 7/158:20 am
MDW
- STL
Nonstop1h 15m
Southwest
Deal found 6/18![Southwest logo]()
$234
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/118:00 am
STL
- ORD
Nonstop1h 35m
United Airlines
Wed 7/157:55 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 6/18![United Airlines logo]()
$234
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/148:41 pm
STL
- ORD
Nonstop1h 37m
American Airlines
Sat 7/1811:25 am
ORD
- STL
Nonstop1h 25m
American Airlines
Deal found 6/15![American Airlines logo]()
$223
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:09 pm
STL
- ORD
1 stop7h 01m
Frontier
Tue 7/217:15 am
ORD
- STL
1 stop10h 50m
Frontier
Deal found 6/16![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 7/156:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Tue 7/216:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/19![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Wed 7/227:03 pm
STL
- MCI
1 stop20h 44m
Frontier
Deal found 6/17![Frontier logo]()
$196
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:30 pm
STL
- MDW
Nonstop1h 10m
Southwest
Sat 7/186:30 am
MDW
- STL
Nonstop1h 15m
Southwest
Deal found 6/16![Southwest logo]()
$223
This Gotogate deal was found by Cheapflights users on 6/19. 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 7/199:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Wed 7/223:55 pm
ORD
- CGI
Nonstop1h 40m
Contour
Deal found 6/19![Contour logo]()
$159
This Mytrip deal was found by Cheapflights users on 6/17. 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.
Wed 7/221:30 pm
CGI
- ORD
Nonstop1h 45m
Contour
Mon 8/1011:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Deal found 6/17![Contour logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Fri 8/74:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Deal found 6/16![Frontier logo]()
$178
One-way flights from Missouri to IllinoisSearch for one-way flight options from Missouri to Illinois. Find affordable one-way fares based on user searches. Data last updated June 20, 2026.
Search for one-way flight options from Missouri to Illinois. Find affordable one-way fares based on user searches. Data last updated June 20, 2026.
This Southwest deal was found by Cheapflights users on 6/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:55 pm
STL
- MDW
Nonstop1h 10m
Southwest
Deal found 6/17![Southwest logo]()
$55
This United Airlines deal was found by Cheapflights users on 6/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
STL
- ORD
Nonstop1h 30m
United Airlines
Deal found 6/17![United Airlines logo]()
$55
This American Airlines deal was found by Cheapflights users on 6/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:55 am
STL
- ORD
Nonstop1h 28m
American Airlines
Deal found 6/17![American Airlines logo]()
$56
This Southwest deal was found by Cheapflights users on 6/19. 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 7/154:00 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 6/19![Southwest logo]()
$59
This United Airlines deal was found by Cheapflights users on 6/19. 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 8/185:30 pm
STL
- ORD
Nonstop1h 31m
United Airlines
Deal found 6/19![United Airlines logo]()
$59
This Southwest deal was found by Cheapflights users on 6/20. 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 8/156:45 am
STL
- MDW
2 stops6h 20m
Southwest
Deal found 6/20![Southwest logo]()
$74
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/162:18 pm
STL
- MDW
1 stop4h 19m
Delta
Deal found 6/16![Delta logo]()
$79
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:54 pm
STL
- ORD
1 stop4h 35m
Delta
Deal found 6/16![Delta logo]()
$79
This Trip.com deal was found by Cheapflights users on 6/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/18![Frontier logo]()
$81
This Trip.com deal was found by Cheapflights users on 6/19. 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.
Fri 7/176:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/19![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/18![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 8/146:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/20![Frontier logo]()
$86
Find flight deals from Missouri to Illinois
Keep the following information in mind while searching for Missouri to Illinois flight deals. Data was last updated June 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $159 (Gotogate) |
One-way from | $55 (Southwest) |
Popular in | January |
Cheapest in | August |
Average price | $344 |
Good round-trip deal | $232 or less |
Good one-way deal | $181 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri to Illinois 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 June 20, 2026.
Use the filters below to find and compare flights from Missouri to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Cape GirardeauChicago
CGI - ORD
CGIORD
Cape Girardeau
Wed 7/22
1:30 pm-3:15 pm
Nonstop1h 45m
Chicago O'Hare Intl
Mon 8/10
11:15 am-12:50 pm
Nonstop1h 35m
$160
Cape GirardeauChicago
CGI - ORD
CGIORD
Cape Girardeau
Sat 7/4
1:30 pm-3:15 pm
Nonstop1h 45m
Chicago O'Hare Intl
Wed 7/8
3:55 pm-5:35 pm
Nonstop1h 40m
$178
Cape GirardeauChicago
CGI - ORD
CGIORD
Cape Girardeau
Sun 7/5
9:50 am-11:35 am
Nonstop1h 45m
Chicago O'Hare Intl
Thu 7/9
12:10 pm-1:50 pm
Nonstop1h 40m
$178
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Tue 8/25
6:30 am-12:39 pm
1 stop6h 09m
Chicago Midway
Sat 8/29
1:27 pm-5:14 pm
1 stop3h 47m
$218
Cape GirardeauChicago
CGI - ORD
CGIORD
Cape Girardeau
Wed 9/9
9:50 am-11:45 am
Nonstop1h 55m
Chicago O'Hare Intl
Tue 9/22
11:15 am-12:50 pm
Nonstop1h 35m
$219
Cape GirardeauChicago
CGI - ORD
CGIORD
Cape Girardeau
Tue 10/20
9:40 am-11:35 am
Nonstop1h 55m
Chicago O'Hare Intl
Wed 10/21
11:15 am-12:50 pm
Nonstop1h 35m
$219
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 8/29
6:54 pm-8:30 pm
Nonstop1h 36m
Chicago O'Hare Intl
Tue 9/1
2:07 pm-3:38 pm
Nonstop1h 31m
$222
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Fri 8/28
11:05 am-12:15 pm
Nonstop1h 10m
Chicago Midway
Tue 9/1
8:30 pm-9:40 pm
Nonstop1h 10m
$223
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Tue 8/18
3:45 pm-4:50 pm
Nonstop1h 05m
Chicago Midway
Sun 8/23
8:25 pm-9:35 pm
Nonstop1h 10m
$223
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Wed 8/5
3:45 pm-4:50 pm
Nonstop1h 05m
Chicago Midway
Fri 8/7
12:05 pm-5:55 pm
1 stop5h 50m
$233
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Missouri to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Missouri with our price prediction graph.
STL-MDW
STL-ORD
MCI-STL
CGI-ORD
SGF-MDW
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 Missouri to Illinois
USMO-USIL
STL-MDW
STL-ORD
MCI-STL
CGI-ORD
What is the cheapest month to book a flight from Missouri to Illinois?
Currently, August is the cheapest month in which you can book a flight from Missouri to Illinois (average of $61). Flying from Missouri to Illinois in June is currently the most expensive (average of $691). 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 MO to IL?
Find hourly flight availability from Missouri to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 20, 2026.
When flying from Missouri to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 33% versus a flight in the evening.
Weekly flight availability from Missouri to Illinois
Explore weekly flight availability from Missouri to Illinois. 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 June 20, 2026.
The most flights from USMO to USIL are scheduled on a Friday (58 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (42 on average).
How much does it cost to fly round-trip from Missouri to Illinois?
How far ahead should I book a flight from Missouri to Illinois?
The price you pay for your flight from Missouri to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Missouri to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Missouri to Illinois. Price data was last updated on June 20, 2026.
Travelers seeking maximum savings on their Missouri to Illinois flight should consider departing on Friday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated June 20, 2026.
Read reviews from past customers who have flown Southwest,Contour, andUnited Airlines from Missouri to Illinois. 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
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Missouri to Illinois. 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 Missouri to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Missouri to Illinois by cabin class
Find flights from Missouri to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Missouri and Illinois flights
Browse other Missouri and Illinois flight options. Last updated on June 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Missouri after your stay in Illinois
Missouri to Illinois flights
Consider these flights traveling from Missouri to Illinois.
Top 5 airlines flying from Missouri to Illinois
Discover the top 5 airlines that operate flights from Missouri to Illinois. 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 June 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$62 | Average$164 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$97 | Average$386 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$128 | Average$354 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$137 | Average$458 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$182 | FlexibilityNo cancel fee | On-time62% |