$59+ Cheap flights from Illinois to Missouri
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
Oct 20 — Oct 271
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Missouri with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 September 20, 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 September 20, 2026.
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/910:05 pm -
Nonstop1h 15m
Sat 10/103:00 pm -
1 stop4h 45m
Deal found 9/17![Southwest logo]()
$154
This Expedia deal was found by Cheapflights users on 9/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:21 am -
1 stop11h 19m
Wed 10/286:44 pm -
1 stop5h 03m
Deal found 9/16![Frontier logo]()
$155
This Delta deal was found by Cheapflights users on 9/18. 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.
Sat 10/1010:12 am -
1 stop4h 33m
Mon 10/122:38 pm -
1 stop3h 22m
Deal found 9/18![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/18. 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.
Sat 10/1012:30 pm -
1 stop4h 08m
Mon 10/122:38 pm -
1 stop3h 51m
Deal found 9/18![Delta logo]()
$157
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
1 stop11h 40m
Wed 10/286:44 pm -
1 stop14h 12m
Deal found 9/16![Frontier logo]()
$162
This Southwest deal was found by Cheapflights users on 9/19. 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 10/204:45 pm -
1 stop4h 50m
Fri 10/236:40 pm -
1 stop5h 40m
Deal found 9/19![Southwest logo]()
$164
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/167:50 am -
Nonstop1h 10m
Fri 10/236:10 pm -
Nonstop1h 05m
Deal found 9/17![Southwest logo]()
$171
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/1610:40 am -
Nonstop1h 33m
Fri 10/238:00 am -
Nonstop1h 31m
Deal found 9/17![United Airlines logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/146:00 am -
1 stop11h 40m
Fri 10/236:35 pm -
1 stop16h 57m
Deal found 9/17![Frontier logo]()
$173
This SmartFares deal was found by Cheapflights users on 9/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:15 am -
Nonstop1h 35m
Mon 10/129:40 am -
Nonstop1h 55m
Deal found 9/19![Contour logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Wed 10/216:00 am -
1 stop11h 40m
Fri 10/236:35 pm -
1 stop16h 57m
Deal found 9/15![Frontier logo]()
$178
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:15 am -
Nonstop1h 35m
Tue 10/69:40 am -
Nonstop1h 55m
Deal found 9/16![Contour logo]()
$181
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 September 20, 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 September 20, 2026.
This Delta deal was found by Cheapflights users on 9/19. 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.
Sat 10/1012:30 pm -
1 stop4h 08m
Mon 10/122:38 pm -
1 stop3h 51m
Deal found 9/19![Delta logo]()
$157
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:15 am -
Nonstop1h 35m
Tue 10/69:40 am -
Nonstop1h 55m
Deal found 9/16![Contour logo]()
$181
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 12/248:40 am -
Nonstop2h 04m
Tue 12/297:31 am -
Nonstop1h 51m
Deal found 9/15![United Airlines logo]()
$243
This Southwest deal was found by Cheapflights users on 9/19. 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 12/93:45 pm -
2 stops6h 20m
Wed 12/168:00 am -
Nonstop1h 25m
Deal found 9/19![Southwest logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Fri 10/96:20 am -
1 stop14h 15m
Mon 10/129:40 am -
Nonstop1h 55m
Deal found 9/15![Multiple Airlines logo]()
$358
This Mytrip deal was found by Cheapflights users on 9/19. 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.
Fri 10/911:15 am -
Nonstop1h 35m
Mon 10/129:40 am -
Nonstop1h 55m
Deal found 9/19![Contour logo]()
$191
This Contour deal was found by Cheapflights users on 9/17. 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.
Fri 10/3011:15 am -
Nonstop1h 35m
Sat 10/319:40 am -
Nonstop1h 55m
Deal found 9/17![Contour logo]()
$198
This Delta deal was found by Cheapflights users on 9/19. 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.
Sat 10/1012:27 pm -
1 stop4h 11m
Mon 10/122:38 pm -
1 stop3h 22m
Deal found 9/19![Delta logo]()
$228
This Contour deal was found by Cheapflights users on 9/19. 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.
Thu 11/511:15 am -
Nonstop1h 35m
Mon 11/99:40 am -
Nonstop1h 55m
Deal found 9/19![Contour logo]()
$198
This American Airlines deal was found by Cheapflights users on 9/19. 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.
Sat 10/105:00 am -
1 stop8h 06m
Fri 10/1610:32 am -
1 stop10h 25m
Deal found 9/19![American Airlines logo]()
$497
This Southwest deal was found by Cheapflights users on 9/19. 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 11/2011:10 am -
Nonstop1h 10m
Tue 12/12:25 pm -
Nonstop1h 05m
Deal found 9/19![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 10/612:27 pm -
1 stop4h 03m
Wed 10/76:30 am -
1 stop5h 17m
Deal found 9/15![Delta logo]()
$247
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/296:58 pm -
1 stop4h 40m
Thu 12/317:31 am -
1 stop6h 47m
Deal found 9/16![United Airlines logo]()
$278
This Southwest deal was found by Cheapflights users on 9/16. 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 10/202:10 pm -
1 stop4h 50m
Wed 10/213:35 pm -
2 stops6h 45m
Deal found 9/16![Southwest logo]()
$264
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 10/612:30 pm -
1 stop4h 00m
Wed 10/76:30 am -
1 stop5h 10m
Deal found 9/15![Delta logo]()
$247
This United Airlines deal was found by Cheapflights users on 9/18. 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 10/237:50 pm -
Nonstop1h 31m
Sun 10/257:30 am -
Nonstop1h 30m
Deal found 9/18![United Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 9/15. 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.
Wed 10/141:25 pm -
Nonstop1h 05m
Wed 10/2112:55 pm -
Nonstop1h 05m
Deal found 9/15![Southwest logo]()
$265
This Delta deal was found by Cheapflights users on 9/19. 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 11/115:42 pm -
1 stop5h 42m
Mon 11/163:26 pm -
1 stop4h 13m
Deal found 9/19![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 9/18. 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 10/309:25 pm -
Nonstop1h 33m
Sun 11/18:00 am -
Nonstop1h 45m
Deal found 9/18![United Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 9/15. 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 10/138:30 am -
Nonstop1h 05m
Tue 10/2012:55 pm -
Nonstop1h 05m
Deal found 9/15![Southwest logo]()
$265
This Delta deal was found by Cheapflights users on 9/19. 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 12/95:33 pm -
1 stop5h 55m
Wed 12/163:31 pm -
1 stop6h 04m
Deal found 9/19![Delta logo]()
$257
This Contour deal was found by Cheapflights users on 9/16. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3011:15 am -
Nonstop1h 35m
Thu 10/19:40 am -
Nonstop1h 55m
Deal found 9/16![Contour logo]()
$283
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/157:55 pm -
Nonstop1h 52m
Wed 12/166:00 am -
Nonstop1h 47m
Deal found 9/16![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 9/15. 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.
Wed 11/412:40 pm -
Nonstop1h 05m
Thu 11/512:40 pm -
Nonstop1h 05m
Deal found 9/15![Southwest logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Sun 11/2211:15 am -
Nonstop1h 35m
Fri 11/279:40 am -
Nonstop1h 55m
Deal found 9/15![Contour logo]()
$283
This Delta deal was found by Cheapflights users on 9/16. 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 10/2011:19 am -
1 stop6h 00m
Wed 10/2112:28 pm -
1 stop4h 12m
Deal found 9/16![Delta logo]()
$263
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/167:50 pm -
Nonstop1h 31m
Mon 10/198:00 am -
Nonstop1h 31m
Deal found 9/16![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 9/19. 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 10/218:30 am -
Nonstop1h 05m
Tue 10/278:15 am -
Nonstop1h 00m
Deal found 9/19![Southwest logo]()
$277
This United Airlines deal was found by Cheapflights users on 9/18. 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 11/2712:45 pm -
Nonstop1h 33m
Sat 11/288:00 am -
Nonstop1h 45m
Deal found 9/18![United Airlines logo]()
$303
This Southwest deal was found by Cheapflights users on 9/18. 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 10/108:25 am -
Nonstop1h 05m
Mon 10/121:50 pm -
Nonstop1h 05m
Deal found 9/18![Southwest logo]()
$277
Last-minute flights from Illinois to MissouriDiscover last-minute flight deals from Illinois to Missouri. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Missouri. Data last updated September 20, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:15 am -
Nonstop1h 35m
Tue 10/69:40 am -
Nonstop1h 55m
Deal found 9/16![Contour logo]()
$181
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/910:05 pm -
Nonstop1h 15m
Sat 10/103:00 pm -
1 stop4h 45m
Deal found 9/17![Southwest logo]()
$154
This SmartFares deal was found by Cheapflights users on 9/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:15 am -
Nonstop1h 35m
Mon 10/129:40 am -
Nonstop1h 55m
Deal found 9/19![Contour logo]()
$174
This Delta deal was found by Cheapflights users on 9/18. 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.
Sat 10/1010:12 am -
1 stop4h 33m
Mon 10/122:38 pm -
1 stop3h 22m
Deal found 9/18![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/18. 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.
Sat 10/1012:30 pm -
1 stop4h 08m
Mon 10/122:38 pm -
1 stop3h 51m
Deal found 9/18![Delta logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/146:00 am -
1 stop11h 40m
Fri 10/236:35 pm -
1 stop16h 57m
Deal found 9/17![Frontier logo]()
$173
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/167:50 am -
Nonstop1h 10m
Fri 10/236:10 pm -
Nonstop1h 05m
Deal found 9/17![Southwest logo]()
$171
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/1610:40 am -
Nonstop1h 33m
Fri 10/238:00 am -
Nonstop1h 31m
Deal found 9/17![United Airlines logo]()
$171
This Southwest deal was found by Cheapflights users on 9/19. 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 10/204:45 pm -
1 stop4h 50m
Fri 10/236:40 pm -
1 stop5h 40m
Deal found 9/19![Southwest logo]()
$164
This Expedia deal was found by Cheapflights users on 9/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:21 am -
1 stop11h 19m
Wed 10/286:44 pm -
1 stop5h 03m
Deal found 9/16![Frontier logo]()
$155
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
1 stop11h 40m
Wed 10/286:44 pm -
1 stop14h 12m
Deal found 9/16![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Wed 10/216:00 am -
1 stop11h 40m
Fri 10/236:35 pm -
1 stop16h 57m
Deal found 9/15![Frontier logo]()
$178
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 September 20, 2026.
Search for one-way flight options from Illinois to Missouri. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This Southwest deal was found by Cheapflights users on 9/19. 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.
Mon 10/1910:05 pm -
Nonstop1h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Southwest logo]()
$59
This American Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/1310:35 pm -
Nonstop1h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![American Airlines logo]()
$59
This Frontier deal was found by Cheapflights users on 9/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:16 am -
1 stop11h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$65
This Frontier deal was found by Cheapflights users on 9/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:30 am -
1 stop8h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$65
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:20 am -
1 stop6h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$68
This Southwest deal was found by Cheapflights users on 9/18. 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 10/176:35 am -
1 stop7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Southwest logo]()
$69
This Super.com deal was found by Cheapflights users on 9/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:15 am -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$73
This Mytrip deal was found by Cheapflights users on 9/17. 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 10/146:00 am -
1 stop11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$74
This Frontier deal was found by Cheapflights users on 9/19. 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.
Mon 11/1610:26 am -
1 stop7h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$76
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:25 am -
1 stop6h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$78
This Delta deal was found by Cheapflights users on 9/18. 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.
Tue 10/201:27 pm -
1 stop3h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Delta logo]()
$79
This Delta deal was found by Cheapflights users on 9/18. 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.
Sat 10/1711:09 am -
1 stop4h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Delta logo]()
$79
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 September 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $154 (Southwest) |
One-way from | $59 (Southwest) |
Popular in | April |
Cheapest in | December |
Average price | $417 |
Good round-trip deal | $61 or less |
Good one-way deal | $116 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 7,457,451 searches. Data last updated September 20, 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
ChicagoSt. Louis
MDW Chicago Midway - STL Lambert-St Louis
MDWSTL
Chicago Midway
Tue 10/20
8:05 am-9:15 am
Nonstop1h 10m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
ChicagoSt. Louis
MDW Chicago Midway - STL Lambert-St Louis
MDWSTL
Chicago Midway
Tue 12/15
7:35 am-8:50 am
Nonstop1h 15m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
ChicagoSt. Louis
MDW Chicago Midway - STL Lambert-St Louis
MDWSTL
Chicago Midway
Tue 12/1
3:50 pm-5:10 pm
Nonstop1h 20m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
ChicagoSt. Louis
MDW Chicago Midway - STL Lambert-St Louis
MDWSTL
Chicago Midway
Tue 11/17
1:31 pm-5:14 pm
1 stop3h 43m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
ChicagoSt. Louis
MDW Chicago Midway - STL Lambert-St Louis
MDWSTL
Chicago Midway
Tue 12/15
1:41 pm-8:32 pm
1 stop6h 51m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
ChicagoSt. Louis
MDW Chicago Midway - STL Lambert-St Louis
MDWSTL
Chicago Midway
Thu 12/17
9:37 am-1:30 pm
1 stop3h 53m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Tue 10/6
7:28 pm-1:10 pm
1 stop17h 42m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$81
ChicagoCape Girardeau
ORD Chicago O'Hare Intl - CGI Cape Girardeau
ORDCGI
Chicago O'Hare Intl
Fri 10/9
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$85
ChicagoCape Girardeau
ORD Chicago O'Hare Intl - CGI Cape Girardeau
ORDCGI
Chicago O'Hare Intl
Fri 10/23
11:15 am-12:50 pm
Nonstop1h 35m
Cape Girardeau
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$85
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Fri 10/23
2:12 pm-3:43 pm
Nonstop1h 31m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$86
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.
MDW-STL
ORD-STL
ORD-CGI
ORD-MCI
MDW-MCI
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
MDW-STL
ORD-STL
ORD-CGI
ORD-MCI
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 $313). Flying from Illinois to Missouri in June is currently the most expensive (average of $458). 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 September 20, 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 September 20, 2026.
The most flights from USIL to USMO are scheduled on a Saturday (62 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (27 on average).
How much does it cost to fly round-trip from Illinois to Missouri?
Airfare is below average for this route at the moment.
Illinois to Missouri flights typically cost between $238 and $502 in October.The cheapest round-trip price found within the last 5 days was $157 on Delta (Oct 10-Oct 12).
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 72 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 September 19, 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. Tuesday 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 September 20, 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.
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - 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.
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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 September 20, 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 7,457,451 searches. Data last updated September 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$104 | Average$150 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$165 | Average$213 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$170 | Average$392 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$171 | Average$328 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$197 | Average$476 | FlexibilityNo cancel fee | On-time63% |