$58+ Cheap flights from Missouri to Illinois
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 11/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ORD
Dec 3 — Dec 101
Round-trip
1 adult, Economy
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Find cheap flights from Missouri to Illinois with Cheapflights
1. Tell us where you want to go
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 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 November 3, 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 November 3, 2026.
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1412:30 pm -
Nonstop1h 45m
Fri 11/202:55 pm -
Nonstop1h 30m
Deal found 10/30![Contour logo]()
$119
This Mytrip deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:30 pm -
Nonstop1h 45m
Fri 11/202:55 pm -
Nonstop1h 30m
Deal found 11/1![Contour logo]()
$123
This Flightnetwork deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2012:30 pm -
Nonstop1h 45m
Sun 12/272:55 pm -
Nonstop1h 30m
Deal found 11/3![Contour logo]()
$147
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/510:35 am -
2 stops6h 30m
Sun 12/67:20 am -
1 stop6h 05m
Deal found 10/29![Southwest logo]()
$162
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:40 am -
1 stop3h 59m
Sun 11/226:23 am -
1 stop5h 58m
Deal found 10/29![Delta logo]()
$167
This Contour deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:30 pm -
Nonstop1h 45m
Mon 12/72:55 pm -
Nonstop1h 30m
Deal found 10/30![Contour logo]()
$168
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/159:40 am -
Nonstop1h 55m
Thu 11/1911:15 am -
Nonstop1h 35m
Deal found 10/30![Contour logo]()
$178
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:10 am -
2 stops7h 20m
Thu 12/38:10 am -
1 stop5h 35m
Deal found 10/29![Southwest logo]()
$179
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Sat 12/195:46 pm -
1 stop7h 10m
Tue 12/225:47 pm -
1 stop6h 54m
Deal found 11/3![Frontier logo]()
$179
This Mytrip deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/169:40 am -
Nonstop1h 55m
Tue 11/1711:15 am -
Nonstop1h 35m
Deal found 11/2![Contour logo]()
$180
This Frontier deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/234:21 pm -
1 stop8h 05m
Sat 1/235:16 pm -
1 stop6h 48m
Deal found 11/1![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/201:20 pm -
1 stop6h 27m
Mon 11/239:09 am -
1 stop8h 31m
Deal found 10/29![Frontier logo]()
$181
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 November 3, 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 November 3, 2026.
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1412:30 pm -
Nonstop1h 45m
Fri 11/202:55 pm -
Nonstop1h 30m
Deal found 10/30![Contour logo]()
$119
This Southwest deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/142:25 pm -
Nonstop1h 05m
Tue 12/1511:45 am -
1 stop5h 35m
Deal found 11/2![Southwest logo]()
$197
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:05 am -
Nonstop1h 38m
Sun 12/2010:45 am -
Nonstop1h 41m
Deal found 10/30![United Airlines logo]()
$203
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:13 am -
1 stop5h 35m
Mon 11/238:29 am -
1 stop4h 27m
Deal found 11/1![Delta logo]()
$233
This Mytrip deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:30 pm -
Nonstop1h 45m
Fri 11/202:55 pm -
Nonstop1h 30m
Deal found 11/1![Contour logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/18:29 pm -
2 stops15h 15m
Thu 12/36:21 am -
1 stop8h 20m
Deal found 10/29![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1412:30 pm -
Nonstop1h 45m
Fri 11/207:29 pm -
1 stop15h 56m
Deal found 10/30![Multiple Airlines logo]()
$301
This Contour deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/1912:30 pm -
Nonstop1h 45m
Sun 11/222:55 pm -
Nonstop1h 30m
Deal found 11/3![Contour logo]()
$139
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/119:14 am -
1 stop6h 46m
Mon 12/149:30 am -
Nonstop1h 22m
Deal found 10/29![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/221:05 pm -
Nonstop1h 05m
Mon 11/239:25 pm -
Nonstop1h 25m
Deal found 11/1![Southwest logo]()
$203
This Contour deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:30 pm -
Nonstop1h 45m
Mon 12/72:55 pm -
Nonstop1h 30m
Deal found 10/30![Contour logo]()
$168
This Southwest deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/297:00 pm -
Nonstop1h 05m
Sun 1/318:10 am -
Nonstop1h 20m
Deal found 10/30![Southwest logo]()
$203
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/307:31 am -
Nonstop1h 51m
Sat 1/93:35 pm -
Nonstop1h 45m
Deal found 11/2![United Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:13 am -
2 stops7h 46m
Fri 11/276:23 am -
1 stop4h 31m
Deal found 10/31![Delta logo]()
$255
This Southwest deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/64:50 pm -
1 stop7h 05m
Mon 1/188:10 am -
Nonstop1h 20m
Deal found 11/1![Southwest logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1112:02 pm -
1 stop9h 40m
Mon 12/148:53 pm -
2 stops38h 11m
Deal found 10/29![Frontier logo]()
$258
This Southwest deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/54:20 pm -
Nonstop1h 05m
Sun 12/611:00 am -
1 stop5h 05m
Deal found 11/2![Southwest logo]()
$213
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/305:00 am -
Nonstop1h 36m
Tue 12/19:45 pm -
Nonstop1h 14m
Deal found 10/30![United Airlines logo]()
$262
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:40 am -
1 stop6h 11m
Mon 11/239:30 am -
2 stops7h 01m
Deal found 10/31![Delta logo]()
$275
This Southwest deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/177:15 pm -
Nonstop1h 05m
Sun 12/207:20 pm -
1 stop4h 55m
Deal found 10/30![Southwest logo]()
$213
This Contour deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/79:40 am -
Nonstop1h 55m
Mon 2/811:15 am -
Nonstop1h 35m
Deal found 10/29![Contour logo]()
$248
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2110:20 am -
1 stop3h 39m
Mon 11/237:05 am -
2 stops9h 26m
Deal found 10/31![Delta logo]()
$275
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/65:00 am -
Nonstop1h 59m
Tue 2/97:40 am -
Nonstop2h 08m
Deal found 10/30![United Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/201:05 pm -
Nonstop1h 05m
Mon 11/233:10 pm -
1 stop3h 55m
Deal found 10/29![Southwest logo]()
$218
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/186:00 am -
Nonstop1h 45m
Sun 12/204:29 pm -
Nonstop1h 39m
Deal found 10/29![American Airlines logo]()
$354
This Contour deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/231:20 pm -
Nonstop1h 55m
Fri 1/811:15 am -
Nonstop1h 35m
Deal found 10/30![Contour logo]()
$248
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:01 am -
Nonstop1h 58m
Thu 11/197:59 am -
Nonstop2h 00m
Deal found 10/29![United Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2210:45 am -
1 stop6h 08m
Sat 12/269:59 am -
1 stop6h 37m
Deal found 11/1![Delta logo]()
$292
This Contour deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/249:40 am -
Nonstop1h 55m
Fri 1/811:15 am -
Nonstop1h 35m
Deal found 10/31![Contour logo]()
$248
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/137:15 pm -
Nonstop1h 05m
Sun 12/207:40 am -
1 stop6h 20m
Deal found 10/29![Southwest logo]()
$238
Last-minute flights from Missouri to IllinoisDiscover last-minute flight deals from Missouri to Illinois. Data last updated November 3, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Illinois. Data last updated November 3, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1412:30 pm -
Nonstop1h 45m
Fri 11/202:55 pm -
Nonstop1h 30m
Deal found 10/30![Contour logo]()
$119
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/159:40 am -
Nonstop1h 55m
Thu 11/1911:15 am -
Nonstop1h 35m
Deal found 10/30![Contour logo]()
$178
This Mytrip deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:30 pm -
Nonstop1h 45m
Fri 11/202:55 pm -
Nonstop1h 30m
Deal found 11/1![Contour logo]()
$123
This Mytrip deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/169:40 am -
Nonstop1h 55m
Tue 11/1711:15 am -
Nonstop1h 35m
Deal found 11/2![Contour logo]()
$180
This Mytrip deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/169:40 am -
Nonstop1h 55m
Fri 11/2011:15 am -
Nonstop1h 35m
Deal found 11/1![Contour logo]()
$182
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:40 am -
1 stop3h 59m
Sun 11/226:23 am -
1 stop5h 58m
Deal found 10/29![Delta logo]()
$167
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/201:20 pm -
1 stop6h 27m
Mon 11/239:09 am -
1 stop8h 31m
Deal found 10/29![Frontier logo]()
$181
This Southwest deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:10 am -
2 stops7h 20m
Thu 12/38:10 am -
1 stop5h 35m
Deal found 10/29![Southwest logo]()
$179
This Contour deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:30 pm -
Nonstop1h 45m
Mon 12/72:55 pm -
Nonstop1h 30m
Deal found 10/30![Contour logo]()
$168
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Sat 12/195:46 pm -
1 stop7h 10m
Tue 12/225:47 pm -
1 stop6h 54m
Deal found 11/3![Frontier logo]()
$179
This Flightnetwork deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2012:30 pm -
Nonstop1h 45m
Sun 12/272:55 pm -
Nonstop1h 30m
Deal found 11/3![Contour logo]()
$147
This Frontier deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/234:21 pm -
1 stop8h 05m
Sat 1/235:16 pm -
1 stop6h 48m
Deal found 11/1![Frontier logo]()
$180
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 November 3, 2026.
Search for one-way flight options from Missouri to Illinois. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
This Booking.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2812:30 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Contour logo]()
$58
This Super.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/216:21 pm -
1 stop5h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$58
This Super.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:02 pm -
1 stop6h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$58
This Southwest deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/179:35 pm -
Nonstop1h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Southwest logo]()
$59
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:02 am -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![American Airlines logo]()
$59
This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:20 pm -
1 stop6h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$60
This Expedia deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:09 am -
1 stop11h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$65
This CheapOair deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/156:20 pm -
1 stop21h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$70
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/266:40 am -
1 stop4h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Delta logo]()
$79
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/176:32 am -
1 stop4h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Delta logo]()
$79
This Frontier deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/245:58 pm -
1 stop6h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$84
This Booking.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/209:40 am -
Nonstop1h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Contour logo]()
$87
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 November 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $119 (Mytrip) |
One-way from | $58 (Booking.com) |
Popular in | January |
Cheapest in | August |
Average price | $317 |
Good round-trip deal | $168 or less |
Good one-way deal | $59 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 7,457,451 searches. Data last updated November 3, 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
KirksvilleChicago
IRK Kirksville Cannon Memorial - ORD Chicago O'Hare Intl
IRKORD
Kirksville Cannon Memorial
Sat 11/28
12:30 pm-2:15 pm
Nonstop1h 45m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$58
Quickest round-trip
St. LouisChicago
STL Lambert-St Louis - MDW Chicago Midway
STLMDW
Lambert-St Louis
Mon 12/14
2:25 pm-3:30 pm
Nonstop1h 05m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Mon 12/14
6:02 am-7:32 am
Nonstop1h 30m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Sat 12/19
7:18 am-9:00 am
Nonstop1h 42m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
St. LouisChicago
STL Lambert-St Louis - MDW Chicago Midway
STLMDW
Lambert-St Louis
Mon 12/21
9:50 pm-11:00 pm
Nonstop1h 10m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Mon 12/7
6:55 pm-8:25 pm
Nonstop1h 30m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
St. LouisChicago
STL Lambert-St Louis - MDW Chicago Midway
STLMDW
Lambert-St Louis
Thu 12/31
10:55 am-12:05 pm
Nonstop1h 10m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
St. LouisChicago
STL Lambert-St Louis - MDW Chicago Midway
STLMDW
Lambert-St Louis
Sat 11/21
9:50 am-3:00 pm
1 stop5h 10m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
St. LouisChicago
STL Lambert-St Louis - MDW Chicago Midway
STLMDW
Lambert-St Louis
Fri 12/11
8:30 pm-1:10 am
1 stop4h 40m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
St. LouisChicago
STL Lambert-St Louis - MDW Chicago Midway
STLMDW
Lambert-St Louis
Fri 11/27
6:40 am-11:25 am
1 stop4h 45m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
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.
IRK-ORD
STL-ORD
CGI-ORD
STL-MDW
MCI-ORD
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
IRK-ORD
STL-ORD
CGI-ORD
STL-MDW
What is the cheapest month to book a flight from Missouri to Illinois?
Currently, December is the cheapest month in which you can book a flight from Missouri to Illinois (average of $307). Flying from Missouri to Illinois in July is currently the most expensive (average of $385). 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 November 3, 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 39% 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 November 3, 2026.
The most flights from USMO to USIL are scheduled on a Sunday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).
How much does it cost to fly round-trip from Missouri to Illinois?
Airfare is below average for this route at the moment.
Missouri to Illinois flights typically cost between $279 and $455 in November.The cheapest round-trip price found within the last 5 days was $167 on Delta (Nov 19-Nov 22).
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 29 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 October 31, 2026.
Travelers seeking maximum savings on their Missouri to Illinois flight should consider departing on Sunday afternoons 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 November 3, 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
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
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.
Browse thousands of different options on Cheapflights for your next trip
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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 November 3, 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 7,457,451 searches. Data last updated November 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$333 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$118 | Average$194 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$171 | Average$176 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$457 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$193 | Average$403 | FlexibilityNo cancel fee | On-time69% |