$59+ Cheap flights from Houston to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Sep 17 — Sep 241
Round-trip
1 adult, Economy
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Find cheap flights from Houston 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 Houston to IllinoisExplore the most affordable flight options available from Houston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2026.
Explore the most affordable flight options available from Houston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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.
Mon 9/146:08 am -
1 stop7h 02m
Mon 9/212:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/179:04 pm -
1 stop16h 06m
Mon 9/212:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 10/26:08 am -
1 stop7h 02m
Mon 10/52:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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.
Mon 9/216:08 am -
1 stop7h 02m
Fri 9/252:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/306:28 am -
1 stop6h 42m
Wed 10/72:29 pm -
1 stop8h 01m
Deal found 8/13![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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 9/299:04 pm -
1 stop16h 06m
Wed 10/2810:35 am -
1 stop11h 35m
Deal found 8/14![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 8/15. 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.
Thu 9/1012:08 pm -
1 stop25h 02m
Mon 9/142:29 pm -
1 stop16h 48m
Deal found 8/15![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/911:25 am -
Nonstop2h 52m
Tue 9/157:28 pm -
1 stop11h 49m
Deal found 8/17![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/94:21 pm -
1 stop6h 38m
Wed 9/167:25 am -
Nonstop3h 05m
Deal found 8/17![Frontier logo]()
$148
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:30 am -
1 stop7h 06m
Sat 9/127:25 am -
Nonstop3h 05m
Deal found 8/17![Frontier logo]()
$149
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:36 am -
Nonstop2h 49m
Tue 10/207:40 am -
Nonstop2h 59m
Deal found 8/17![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/96:28 am -
1 stop6h 42m
Wed 9/162:29 pm -
1 stop8h 01m
Deal found 8/16![Frontier logo]()
$150
Best flights from Houston to IllinoisDiscover carefully curated flight deals from Houston to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 18, 2026.
Discover carefully curated flight deals from Houston to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 18, 2026.
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/107:55 pm -
Nonstop2h 25m
Sat 9/125:55 am -
1 stop6h 00m
Deal found 8/13![Southwest logo]()
$195
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:30 am -
1 stop7h 29m
Wed 9/167:05 am -
1 stop7h 19m
Deal found 8/13![Delta logo]()
$205
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 10/228:15 pm -
Nonstop2h 15m
Mon 10/266:15 am -
Nonstop2h 20m
Deal found 8/13![United Airlines logo]()
$214
This American Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/46:14 pm -
1 stop4h 39m
Sun 9/65:00 am -
2 stops7h 27m
Deal found 8/13![American Airlines logo]()
$324
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/127:40 pm -
Nonstop2h 20m
Sat 9/192:15 pm -
1 stop4h 35m
Deal found 8/13![Southwest logo]()
$195
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” 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 8/315:20 pm -
1 stop6h 37m
Tue 9/13:25 pm -
1 stop6h 40m
Deal found 8/12![Delta logo]()
$205
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:15 pm -
Nonstop2h 15m
Mon 9/146:15 am -
Nonstop2h 12m
Deal found 8/17![United Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 8/16. 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 9/88:50 pm -
Nonstop2h 25m
Thu 9/105:25 am -
Nonstop2h 25m
Deal found 8/16![Southwest logo]()
$209
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 11/115:30 pm -
1 stop6h 29m
Sat 11/1411:29 am -
2 stops11h 44m
Deal found 8/13![Delta logo]()
$210
This Southwest deal was found by Cheapflights users on 8/15. 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.
Thu 9/107:55 pm -
Nonstop2h 25m
Tue 9/157:50 am -
Nonstop2h 35m
Deal found 8/15![Southwest logo]()
$209
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 10/208:00 am -
Nonstop2h 10m
Mon 10/268:30 am -
Nonstop2h 31m
Deal found 8/13![United Airlines logo]()
$235
This Delta deal was found by Cheapflights users on 8/16. 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 9/85:26 pm -
1 stop6h 33m
Thu 9/1010:44 am -
1 stop5h 46m
Deal found 8/16![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 8/16. 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 9/93:55 pm -
Nonstop2h 00m
Wed 9/168:40 am -
Nonstop2h 00m
Deal found 8/16![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:00 pm -
1 stop5h 33m
Wed 10/2110:59 am -
1 stop4h 55m
Deal found 8/13![Delta logo]()
$231
This Southwest deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:00 am -
Nonstop2h 25m
Tue 9/228:40 am -
1 stop6h 20m
Deal found 8/14![Southwest logo]()
$219
This Delta deal was found by Cheapflights users on 8/15. 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 9/2211:26 am -
2 stops9h 30m
Sat 9/265:30 am -
1 stop8h 00m
Deal found 8/15![Delta logo]()
$234
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:57 pm -
1 stop6h 56m
Wed 9/26:32 am -
1 stop5h 12m
Deal found 8/14![American Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 8/15. 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 10/18:15 pm -
Nonstop2h 15m
Mon 10/53:12 pm -
Nonstop2h 13m
Deal found 8/15![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 8/16. 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 9/232:35 pm -
2 stops5h 35m
Mon 9/285:25 am -
Nonstop2h 25m
Deal found 8/16![Southwest logo]()
$224
This Delta deal was found by Cheapflights users on 8/16. 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 9/3011:00 am -
2 stops9h 30m
Wed 10/76:30 am -
1 stop7h 37m
Deal found 8/16![Delta logo]()
$234
This American Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:57 pm -
1 stop7h 22m
Sat 9/512:20 pm -
1 stop5h 24m
Deal found 8/17![American Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Sat 10/1011:58 am -
Nonstop2h 12m
Wed 10/148:35 am -
Nonstop2h 17m
Deal found 8/17![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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 9/284:10 pm -
Nonstop2h 00m
Wed 9/307:15 am -
1 stop4h 05m
Deal found 8/14![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:35 am -
2 stops7h 24m
Tue 11/102:44 pm -
2 stops7h 27m
Deal found 8/16![Delta logo]()
$239
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:14 pm -
1 stop5h 05m
Tue 9/16:00 am -
2 stops9h 26m
Deal found 8/14![American Airlines logo]()
$354
This Southwest deal was found by Cheapflights users on 8/16. 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 9/3011:25 am -
1 stop5h 25m
Wed 10/71:45 pm -
Nonstop2h 00m
Deal found 8/16![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/118:00 am -
Nonstop2h 10m
Mon 9/146:15 am -
Nonstop2h 12m
Deal found 8/17![United Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 8/15. 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 9/2211:26 am -
2 stops9h 30m
Tue 9/2911:17 am -
2 stops9h 57m
Deal found 8/15![Delta logo]()
$239
This American Airlines deal was found by Cheapflights users on 8/15. 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 9/43:57 pm -
1 stop6h 14m
Sun 9/611:32 am -
1 stop6h 12m
Deal found 8/15![American Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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 9/107:55 pm -
Nonstop2h 25m
Fri 9/111:05 pm -
1 stop5h 20m
Deal found 8/14![Southwest logo]()
$228
Last-minute flights from Houston to IllinoisDiscover last-minute flight deals from Houston to Illinois. Data last updated August 18, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Illinois. Data last updated August 18, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:30 am -
1 stop7h 06m
Sat 9/127:25 am -
Nonstop3h 05m
Deal found 8/17![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/911:25 am -
Nonstop2h 52m
Tue 9/157:28 pm -
1 stop11h 49m
Deal found 8/17![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/94:21 pm -
1 stop6h 38m
Wed 9/167:25 am -
Nonstop3h 05m
Deal found 8/17![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/96:28 am -
1 stop6h 42m
Wed 9/162:29 pm -
1 stop8h 01m
Deal found 8/16![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/15. 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.
Thu 9/1012:08 pm -
1 stop25h 02m
Mon 9/142:29 pm -
1 stop16h 48m
Deal found 8/15![Frontier logo]()
$146
This Expedia deal was found by Cheapflights users on 8/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:50 pm -
Nonstop2h 49m
Mon 9/147:28 pm -
1 stop11h 49m
Deal found 8/17![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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.
Mon 9/146:08 am -
1 stop7h 02m
Mon 9/212:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/179:04 pm -
1 stop16h 06m
Mon 9/212:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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.
Mon 9/216:08 am -
1 stop7h 02m
Fri 9/252:29 pm -
1 stop16h 48m
Deal found 8/13![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:25 am -
Nonstop2h 52m
Tue 9/297:25 am -
Nonstop3h 05m
Deal found 8/17![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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 9/299:04 pm -
1 stop16h 06m
Wed 10/2810:35 am -
1 stop11h 35m
Deal found 8/14![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/306:28 am -
1 stop6h 42m
Wed 10/72:29 pm -
1 stop8h 01m
Deal found 8/13![Frontier logo]()
$135
One-way flights from Houston to IllinoisSearch for one-way flight options from Houston to Illinois. Find affordable one-way fares based on user searches. Data last updated August 18, 2026.
Search for one-way flight options from Houston to Illinois. Find affordable one-way fares based on user searches. Data last updated August 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 11/118:44 pm -
1 stop12h 56m
Deal found 8/13![Frontier logo]()
$59
This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/216:08 am -
1 stop7h 02m
Deal found 8/13![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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.
Mon 9/146:08 am -
1 stop7h 02m
Deal found 8/13![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 11/188:44 pm -
1 stop12h 56m
Deal found 8/17![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/159:04 pm -
1 stop16h 06m
Deal found 8/13![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:08 am -
1 stop7h 02m
Deal found 8/14![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” 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 9/96:28 am -
1 stop6h 42m
Deal found 8/13![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/166:28 am -
1 stop6h 42m
Deal found 8/17![Frontier logo]()
$74
This Trip.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
Sun 9/139:04 pm -
1 stop16h 06m
Deal found 8/14![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Mon 9/286:08 am -
1 stop7h 02m
Deal found 8/17![Frontier logo]()
$77
This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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 10/2112:07 pm -
1 stop6h 24m
Deal found 8/14![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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 9/1112:08 pm -
1 stop5h 43m
Deal found 8/14![Frontier logo]()
$78
Find flight deals from Houston to Illinois
Keep the following information in mind while searching for Houston to Illinois flight deals. Data was last updated August 18, 2026.
Round-trip from | $120 (Kiwi.com) |
|---|---|
One-way from | $59 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $249 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2026.
Use the filters below to find and compare flights from Houston to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonChicago
HOU Houston Hobby - MDW Chicago Midway
HOUMDW
Houston Hobby
Thu 9/10
7:55 pm-10:20 pm
Nonstop2h 25m
Chicago Midway
Sat 9/12
5:55 am-11:55 am
1 stop6h 00m
$195
HoustonChicago
HOU Houston Hobby - MDW Chicago Midway
HOUMDW
Houston Hobby
Sat 9/12
7:40 pm-10:00 pm
Nonstop2h 20m
Chicago Midway
Sat 9/19
2:15 pm-6:50 pm
1 stop4h 35m
$195
HoustonChicago
IAH Houston George Bush Intcntl - ORD Chicago O'Hare Intl
IAHORD
Houston George Bush Intcntl
Tue 9/8
5:30 am-12:59 pm
1 stop7h 29m
Chicago O'Hare Intl
Wed 9/16
7:05 am-2:24 pm
1 stop7h 19m
$205
HoustonChicago
HOU Houston Hobby - ORD Chicago O'Hare Intl
HOUORD
Houston Hobby
Mon 8/31
5:20 pm-11:57 pm
1 stop6h 37m
Chicago O'Hare Intl
Tue 9/1
3:25 pm-10:05 pm
1 stop6h 40m
$205
HoustonChicago
HOU Houston Hobby - MDW Chicago Midway
HOUMDW
Houston Hobby
Tue 9/8
8:50 pm-11:15 pm
Nonstop2h 25m
Chicago Midway
Thu 9/10
5:25 am-7:50 am
Nonstop2h 25m
$209
HoustonChicago
HOU Houston Hobby - MDW Chicago Midway
HOUMDW
Houston Hobby
Thu 9/10
7:55 pm-10:20 pm
Nonstop2h 25m
Chicago Midway
Tue 9/15
7:50 am-10:25 am
Nonstop2h 35m
$209
HoustonChicago
HOU Houston Hobby - ORD Chicago O'Hare Intl
HOUORD
Houston Hobby
Wed 11/11
5:30 pm-11:59 pm
1 stop6h 29m
Chicago O'Hare Intl
Sat 11/14
11:29 am-11:13 pm
2 stops11h 44m
$210
HoustonSt. Louis
IAH Houston George Bush Intcntl - STL Lambert-St Louis
IAHSTL
Houston George Bush Intcntl
Thu 10/22
8:15 pm-10:30 pm
Nonstop2h 15m
Lambert-St Louis
Mon 10/26
6:15 am-8:35 am
Nonstop2h 20m
$214
HoustonSt. Louis
IAH Houston George Bush Intcntl - STL Lambert-St Louis
IAHSTL
Houston George Bush Intcntl
Thu 9/10
8:15 pm-10:30 pm
Nonstop2h 15m
Lambert-St Louis
Mon 9/14
6:15 am-8:27 am
Nonstop2h 12m
$217
Quickest round-trip
HoustonSt. Louis
HOU Houston Hobby - STL Lambert-St Louis
HOUSTL
Houston Hobby
Wed 9/9
3:55 pm-5:55 pm
Nonstop2h 00m
Lambert-St Louis
Wed 9/16
8:40 am-10:40 am
Nonstop2h 00m
$217
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Houston to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Houston with our price prediction graph.
HOU-MDW
IAH-ORD
HOU-ORD
HOU-STL
HOU-MLI
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 Houston to Illinois
HO1-USIL
HOU-MDW
IAH-ORD
HOU-ORD
HOU-STL
What is the cheapest month to book a flight from Houston to Illinois?
Currently, October is the cheapest month in which you can book a flight from Houston to Illinois (average of $210). Flying from Houston to Illinois in June is currently the most expensive (average of $347). 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 HOU to IL?
Find hourly flight availability from Houston 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 August 18, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 46% on flights from Houston to Illinois by exploring options for tickets in the evening.
How much does it cost to fly round-trip from Houston to Illinois?
Airfare is below average for this route at the moment.
Houston to Illinois flights typically cost between $190 and $317 in September.The cheapest round-trip price found within the last 5 days was $147 on Frontier (Sep 9-Sep 15).
How far ahead should I book a flight from Houston to Illinois?
The price you pay for your flight from Houston to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 78 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 Houston to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Houston to Illinois. Price data was last updated on August 31, 2025.
Travelers seeking maximum savings on their Houston to Illinois flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday at noon 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 August 18, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Houston to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Related info for your journey
Find useful and relevant information for your journey from Houston to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Houston to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Illinois by cabin class
Find flights from Houston to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Illinois flights
Browse other Houston and Illinois flight options. Last updated on August 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Houston to Illinois flights
Consider these flights traveling from Houston to Illinois.
Top 6 airlines flying from Houston to Illinois
Discover the top 6 airlines that operate flights from Houston to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$179 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$362 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$382 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$197 | Average$386 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$228 | Average$327 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$268 | Average$309 | FlexibilityNo cancel fee | On-time62% |