$55+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MCI
Jul 21 — Jul 281
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Missouri with Cheapflights
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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 June 21, 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 June 21, 2026.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Mon 7/209:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Deal found 6/19![Contour logo]()
$158
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Sun 7/59:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Deal found 6/18![Contour logo]()
$160
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.
Tue 7/216:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/20![Frontier logo]()
$165
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.
Fri 7/174:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/19![Frontier logo]()
$167
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.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Tue 9/19:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 6/15![Contour logo]()
$178
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.
Wed 7/227:03 pm
STL
- MCI
1 stop20h 44m
Frontier
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/20![Frontier logo]()
$196
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/118:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Wed 8/191:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Deal found 6/17![Frontier logo]()
$222
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 8/289:20 pm
ORD
- COU
Nonstop1h 35m
United Airlines
Sat 8/293:12 pm
COU
- ORD
Nonstop1h 48m
United Airlines
Deal found 6/19![United Airlines logo]()
$239
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.
Tue 7/216:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Sat 7/251:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Deal found 6/20![Frontier logo]()
$244
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.
Thu 7/236:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Sat 7/251:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Deal found 6/20![Frontier logo]()
$245
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.
Wed 7/88:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Wed 8/56:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/16![Frontier logo]()
$246
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.
Thu 7/99:30 pm
ORD
- SGF
Nonstop1h 57m
United Airlines
Sat 7/116:34 pm
SGF
- ORD
Nonstop1h 55m
United Airlines
Deal found 6/18![United Airlines logo]()
$249
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 June 21, 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 June 21, 2026.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Sun 7/59:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Deal found 6/18![Contour logo]()
$160
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:45 pm
ORD
- SGF
Nonstop1h 47m
American Airlines
Sun 9/207:51 pm
SGF
- ORD
Nonstop1h 55m
American Airlines
Deal found 6/20![American Airlines logo]()
$249
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.
Sun 7/128:40 am
ORD
- COU
Nonstop1h 33m
United Airlines
Sun 7/1910:49 am
COU
- ORD
Nonstop1h 41m
United Airlines
Deal found 6/18![United Airlines logo]()
$254
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.
Mon 9/148:55 pm
MDW
- STL
Nonstop1h 10m
Southwest
Fri 9/186:05 am
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 6/16![Southwest logo]()
$266
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.
Wed 8/191:59 pm
ORD
- SGF
2 stops8h 22m
Delta
Sat 8/2211:38 am
SGF
- ORD
1 stop7h 21m
Delta
Deal found 6/20![Delta logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/196:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Sun 7/264:32 pm
MCI
- STL
1 stop25h 43m
Frontier
Deal found 6/21![Frontier logo]()
$312
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Mon 7/209:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Deal found 6/18![Contour logo]()
$161
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.
Sat 8/294:00 pm
ORD
- CGI
Nonstop1h 35m
Contour
Tue 9/19:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 6/15![Contour logo]()
$178
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:15 am
ORD
- CGI
Nonstop1h 35m
Contour
Sun 8/99:50 am
CGI
- ORD
Nonstop1h 55m
Contour
Deal found 6/17![Contour logo]()
$178
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.
Fri 7/37:29 pm
ORD
- COU
Nonstop1h 32m
American Airlines
Mon 7/66:20 am
COU
- ORD
Nonstop1h 41m
American Airlines
Deal found 6/15![American Airlines logo]()
$254
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.
Wed 8/191:25 pm
MDW
- SGF
2 stops8h 56m
Delta
Sat 8/224:00 pm
SGF
- MDW
1 stop6h 36m
Delta
Deal found 6/20![Delta logo]()
$274
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 7/1810:15 am
STL
- MCI
Nonstop1h 05m
Southwest
Sat 7/251:50 pm
MCI
- STL
Nonstop1h 05m
Southwest
Deal found 6/20![Southwest logo]()
$275
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/249:30 pm
ORD
- SGF
Nonstop1h 57m
United Airlines
Mon 7/276:34 pm
SGF
- ORD
Nonstop1h 55m
United Airlines
Deal found 6/20![United Airlines logo]()
$281
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.
Fri 8/284:25 pm
MDW
- STL
1 stop3h 30m
Southwest
Mon 8/3111:05 am
STL
- MDW
Nonstop1h 10m
Southwest
Deal found 6/19![Southwest logo]()
$276
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.
Fri 9/119:00 am
ORD
- COU
Nonstop1h 39m
United Airlines
Sun 9/136:15 am
COU
- ORD
Nonstop1h 39m
United Airlines
Deal found 6/18![United Airlines logo]()
$284
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 8/81:20 pm
MDW
- STL
1 stop6h 30m
Southwest
Mon 8/1010:30 am
STL
- MDW
1 stop4h 35m
Southwest
Deal found 6/20![Southwest logo]()
$286
This United Airlines deal was found by Cheapflights users on 6/21. 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 7/2210:40 am
ORD
- STL
Nonstop1h 31m
United Airlines
Wed 7/227:05 pm
STL
- ORD
Nonstop1h 34m
United Airlines
Deal found 6/21![United Airlines logo]()
$297
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.
Thu 8/278:28 am
ORD
- MCI
1 stop6h 46m
Delta
Sun 8/306:28 am
MCI
- ORD
1 stop5h 09m
Delta
Deal found 6/20![Delta logo]()
$331
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 10/202:25 pm
STL
- MCI
Nonstop1h 05m
Southwest
Tue 10/2711:45 am
MCI
- STL
2 stops6h 00m
Southwest
Deal found 6/19![Southwest logo]()
$290
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 7/179:30 pm
ORD
- SGF
Nonstop1h 57m
United Airlines
Fri 7/247:45 am
SGF
- ORD
Nonstop1h 55m
United Airlines
Deal found 6/19![United Airlines logo]()
$306
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 9/41:59 pm
ORD
- STL
1 stop6h 43m
Delta
Sun 9/610:33 am
STL
- ORD
1 stop5h 44m
Delta
Deal found 6/20![Delta logo]()
$357
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 10/99:20 pm
ORD
- COU
Nonstop1h 35m
United Airlines
Sun 10/116:15 am
COU
- ORD
Nonstop1h 38m
United Airlines
Deal found 6/17![United Airlines logo]()
$309
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.
Thu 10/83:20 pm
MDW
- MCI
Nonstop1h 25m
Southwest
Sun 10/1112:05 pm
MCI
- MDW
Nonstop1h 25m
Southwest
Deal found 6/19![Southwest logo]()
$311
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.
Wed 7/228:40 am
ORD
- COU
Nonstop1h 33m
United Airlines
Sat 7/253:25 pm
COU
- ORD
Nonstop1h 40m
United Airlines
Deal found 6/15![United Airlines logo]()
$309
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.
Mon 7/136:04 am
ORD
- COU
1 stop5h 10m
American Airlines
Mon 7/206:32 pm
COU
- ORD
Nonstop1h 51m
American Airlines
Deal found 6/15![American Airlines logo]()
$468
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.
Thu 9/31:59 pm
ORD
- SGF
2 stops8h 22m
Delta
Sun 9/611:38 am
SGF
- ORD
1 stop5h 13m
Delta
Deal found 6/19![Delta logo]()
$390
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.
Sat 9/1210:30 am
MDW
- MCI
Nonstop1h 25m
Southwest
Sun 9/137:50 pm
MCI
- MDW
Nonstop1h 25m
Southwest
Deal found 6/17![Southwest logo]()
$324
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1610:00 pm
ORD
- COU
Nonstop1h 33m
United Airlines
Sat 7/188:00 am
COU
- ORD
Nonstop1h 40m
United Airlines
Deal found 6/20![United Airlines logo]()
$309
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:22 am
ORD
- SGF
2 stops10h 59m
Delta
Mon 9/76:06 am
SGF
- ORD
1 stop8h 03m
Delta
Deal found 6/18![Delta logo]()
$390
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 9/128:25 am
STL
- MCI
1 stop4h 55m
Southwest
Thu 9/178:25 am
MCI
- STL
Nonstop1h 05m
Southwest
Deal found 6/18![Southwest logo]()
$331
Last-minute flights from Illinois to MissouriDiscover last-minute flight deals from Illinois to Missouri. Data last updated June 21, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Missouri. Data last updated June 21, 2026 and is based on user searches.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Sun 7/59:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Deal found 6/18![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.
Wed 7/88:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Wed 8/56:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/16![Frontier logo]()
$246
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.
Thu 7/99:30 pm
ORD
- SGF
Nonstop1h 57m
United Airlines
Sat 7/116:34 pm
SGF
- ORD
Nonstop1h 55m
United Airlines
Deal found 6/18![United Airlines logo]()
$249
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 7/108:40 am
ORD
- COU
Nonstop1h 33m
United Airlines
Mon 7/133:25 pm
COU
- ORD
Nonstop1h 40m
United Airlines
Deal found 6/17![United Airlines logo]()
$253
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/124:30 pm
ORD
- COU
Nonstop1h 32m
American Airlines
Sun 7/196:20 am
COU
- ORD
Nonstop1h 41m
American Airlines
Deal found 6/19![American Airlines logo]()
$239
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:10 pm
ORD
- CGI
Nonstop1h 40m
Contour
Mon 7/209:50 am
CGI
- ORD
Nonstop1h 45m
Contour
Deal found 6/19![Contour logo]()
$158
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.
Fri 7/174:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/19![Frontier logo]()
$167
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.
Tue 7/216:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/20![Frontier logo]()
$165
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.
Tue 7/216:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Sat 7/251:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Deal found 6/20![Frontier logo]()
$244
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.
Wed 7/227:03 pm
STL
- MCI
1 stop20h 44m
Frontier
Fri 7/246:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/20![Frontier logo]()
$196
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.
Thu 7/236:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Sat 7/251:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Deal found 6/20![Frontier logo]()
$245
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 7/3112:11 pm
MDW
- STL
1 stop20h 46m
Frontier
Fri 8/74:57 pm
STL
- MDW
1 stop16h 54m
Frontier
Deal found 6/16![Frontier logo]()
$254
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 June 21, 2026.
Search for one-way flight options from Illinois to Missouri. Find affordable one-way fares based on user searches. Data last updated June 21, 2026.
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 8/122:00 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 6/16![Southwest logo]()
$55
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 7/1411:00 pm
ORD
- STL
Nonstop1h 16m
American Airlines
Deal found 6/15![American Airlines logo]()
$55
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 7/299:19 am
MDW
- STL
1 stop3h 46m
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.
Tue 7/147:05 am
ORD
- STL
1 stop6h 00m
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 7/244:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Deal found 6/18![Frontier logo]()
$81
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.
Thu 7/166:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/18![Frontier logo]()
$82
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.
Tue 7/146:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/19![Frontier logo]()
$84
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 9/1610:35 am
STL
- MCI
1 stop6h 41m
Frontier
Deal found 6/19![Frontier logo]()
$85
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.
Sun 7/196:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/20![Frontier logo]()
$86
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.
Tue 7/145:10 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 6/16![Southwest logo]()
$90
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 7/147:55 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 6/16![United Airlines logo]()
$90
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.
Mon 10/510:35 am
STL
- MCI
1 stop6h 41m
Frontier
Deal found 6/18![Frontier logo]()
$92
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 June 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $158 (Kiwi.com) |
One-way from | $55 (Southwest) |
Popular in | April |
Cheapest in | December |
Average price | $493 |
Good round-trip deal | $61 or less |
Good one-way deal | $64 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 June 21, 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
Thu 7/2
12:10 pm-1:50 pm
Nonstop1h 40m
Cape Girardeau
Sun 7/5
9:50 am-11:35 am
Nonstop1h 45m
$160
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Tue 7/14
12:10 pm-1:50 pm
Nonstop1h 40m
Cape Girardeau
Mon 7/20
9:50 am-11:35 am
Nonstop1h 45m
$161
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
$178
ChicagoCape Girardeau
ORD - CGI
ORDCGI
Chicago O'Hare Intl
Fri 8/7
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Sun 8/9
9:50 am-11:45 am
Nonstop1h 55m
$178
ChicagoSpringfield
ORD - SGF
ORDSGF
Chicago O'Hare Intl
Thu 9/17
8:45 pm-10:32 pm
Nonstop1h 47m
Springfield-Branson
Sun 9/20
7:51 pm-9:46 pm
Nonstop1h 55m
$249
ChicagoColumbia
ORD - COU
ORDCOU
Chicago O'Hare Intl
Sun 7/12
8:40 am-10:13 am
Nonstop1h 33m
Columbia Regional
Sun 7/19
10:49 am-12:30 pm
Nonstop1h 41m
$254
ChicagoColumbia
ORD - COU
ORDCOU
Chicago O'Hare Intl
Fri 7/3
7:29 pm-9:01 pm
Nonstop1h 32m
Columbia Regional
Mon 7/6
6:20 am-8:01 am
Nonstop1h 41m
$254
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Mon 9/14
8:55 pm-10:05 pm
Nonstop1h 10m
Lambert-St Louis
Fri 9/18
6:05 am-7:10 am
Nonstop1h 05m
$266
ChicagoSpringfield
ORD - SGF
ORDSGF
Chicago O'Hare Intl
Wed 8/19
1:59 pm-10:21 pm
2 stops8h 22m
Springfield-Branson
Sat 8/22
11:38 am-6:59 pm
1 stop7h 21m
$274
ChicagoSpringfield
MDW - SGF
MDWSGF
Chicago Midway
Wed 8/19
1:25 pm-10:21 pm
2 stops8h 56m
Springfield-Branson
Sat 8/22
4:00 pm-10:36 pm
1 stop6h 36m
$274
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.
ORD-CGI
STL-MCI
ORD-COU
ORD-SGF
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
ORD-CGI
STL-MCI
ORD-COU
ORD-SGF
What is the cheapest month to book a flight from Illinois to Missouri?
Currently, September is the cheapest month in which you can book a flight from Illinois to Missouri (average of $68). Flying from Illinois to Missouri in January is currently the most expensive (average of $143). 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 June 21, 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 23% 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 June 21, 2026.
The most flights from USIL to USMO are scheduled on a Saturday (55 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (35 on average).
How much does it cost to fly round-trip from Illinois to Missouri?
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 June 20, 2026.
Travelers seeking maximum savings on their Illinois to Missouri flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Saturday 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 June 21, 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.
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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 June 21, 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 June 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$378 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$92 | Average$141 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$124 | Average$345 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$157 | Average$383 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$165 | Average$227 | FlexibilityNo cancel fee | On-timeN/A |