$79+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Jul 19 — Jul 261
Round-trip
1 adult, Economy
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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 June 19, 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 June 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:52 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Mon 8/315:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/16![Frontier logo]()
$134
This Expedia deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Tue 9/15:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/15![Frontier logo]()
$135
This Frontier deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:42 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Sat 8/155:30 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/16![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:42 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Tue 8/185:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/15![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/199:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Wed 7/225:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/16![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/209:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Sat 8/15:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/16![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Thu 7/165:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/16![Frontier logo]()
$142
This Frontier deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:52 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Tue 9/85:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/17![Frontier logo]()
$143
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/259:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Thu 7/305:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/15![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/209:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Sat 7/255:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/17![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/69:42 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Mon 8/105:30 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/18![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Tue 8/115:30 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/17![Frontier logo]()
$148
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 June 19, 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 June 19, 2026.
This Southwest deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:40 pm
HOU
- MDW
Nonstop2h 20m
Southwest
Tue 8/1810:10 am
MDW
- HOU
1 stop3h 50m
Southwest
Deal found 6/18![Southwest logo]()
$223
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:30 am
IAH
- MDW
1 stop6h 39m
Delta
Wed 7/226:00 am
MDW
- IAH
1 stop7h 33m
Delta
Deal found 6/15![Delta logo]()
$229
This Orbitz deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/209:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Sun 7/269:57 pm
ORD
- IAH
1 stop12h 37m
Frontier
Deal found 6/18![Frontier logo]()
$230
This American Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:13 am
IAH
- MLI
1 stop4h 45m
American Airlines
Fri 7/106:50 pm
MLI
- IAH
1 stop5h 01m
American Airlines
Deal found 6/15![American Airlines logo]()
$246
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1912:04 pm
IAH
- STL
Nonstop2h 11m
United Airlines
Tue 9/2211:15 am
STL
- IAH
Nonstop2h 17m
United Airlines
Deal found 6/16![United Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:25 am
HOU
- MDW
1 stop3h 50m
Southwest
Sat 8/156:05 pm
MDW
- HOU
Nonstop2h 35m
Southwest
Deal found 6/17![Southwest logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/72:54 pm
IAH
- PIA
2 stops25h 06m
Multiple Airlines
Sun 8/95:23 pm
PIA
- IAH
1 stop7h 17m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$464
This Delta deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:15 pm
IAH
- ORD
1 stop5h 15m
Delta
Tue 8/186:00 am
ORD
- IAH
2 stops8h 20m
Delta
Deal found 6/16![Delta logo]()
$234
This Southwest deal was found by Cheapflights users on 6/13. 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 9/57:15 am
HOU
- MDW
Nonstop2h 30m
Southwest
Tue 9/87:40 am
MDW
- HOU
2 stops6h 05m
Southwest
Deal found 6/13![Southwest logo]()
$232
This Delta deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/410:50 am
HOU
- ORD
2 stops9h 40m
Delta
Tue 8/116:40 am
ORD
- HOU
1 stop5h 36m
Delta
Deal found 6/17![Delta logo]()
$234
This American Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:00 am
IAH
- PIA
1 stop6h 50m
American Airlines
Sat 8/227:11 am
PIA
- IAH
1 stop6h 08m
American Airlines
Deal found 6/17![American Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
HOU
- ORD
2 stops10h 23m
Delta
Wed 8/55:30 am
ORD
- HOU
1 stop6h 46m
Delta
Deal found 6/15![Delta logo]()
$234
This Southwest deal was found by Cheapflights users on 6/14. 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 7/278:10 am
HOU
- MDW
Nonstop2h 30m
Southwest
Thu 8/65:55 am
MDW
- HOU
Nonstop2h 30m
Southwest
Deal found 6/14![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:40 pm
IAH
- MDW
1 stop6h 30m
Delta
Sat 10/109:30 am
MDW
- IAH
1 stop5h 14m
Delta
Deal found 6/18![Delta logo]()
$237
This American Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:41 am
HOU
- PIA
1 stop6h 09m
American Airlines
Sat 8/2212:20 pm
PIA
- HOU
1 stop7h 31m
American Airlines
Deal found 6/15![American Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:06 pm
IAH
- MLI
1 stop6h 08m
United Airlines
Wed 9/28:13 am
MLI
- IAH
1 stop5h 23m
United Airlines
Deal found 6/14![United Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:50 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Wed 7/299:00 pm
MDW
- HOU
Nonstop2h 40m
Southwest
Deal found 6/15![Southwest logo]()
$254
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:00 pm
HOU
- ORD
1 stop7h 20m
Delta
Sat 10/103:35 pm
ORD
- HOU
1 stop6h 08m
Delta
Deal found 6/18![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:00 am
IAH
- MLI
1 stop4h 54m
United Airlines
Tue 8/185:40 am
MLI
- IAH
1 stop6h 06m
United Airlines
Deal found 6/18![United Airlines logo]()
$323
This American Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:03 am
HOU
- MLI
1 stop4h 36m
American Airlines
Thu 8/64:32 pm
MLI
- HOU
1 stop7h 24m
American Airlines
Deal found 6/15![American Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:26 pm
HOU
- ORD
1 stop6h 33m
Delta
Tue 9/225:30 am
ORD
- HOU
1 stop7h 54m
Delta
Deal found 6/19![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:20 pm
IAH
- MLI
1 stop5h 54m
United Airlines
Sat 10/312:26 pm
MLI
- IAH
1 stop5h 14m
United Airlines
Deal found 6/17![United Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:50 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Mon 8/241:05 pm
MDW
- HOU
1 stop5h 20m
Southwest
Deal found 6/17![Southwest logo]()
$268
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:00 am
IAH
- ORD
2 stops9h 52m
Delta
Wed 10/77:10 am
ORD
- IAH
1 stop7h 50m
Delta
Deal found 6/14![Delta logo]()
$242
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:03 am
HOU
- MLI
1 stop4h 36m
American Airlines
Wed 7/2911:09 am
MLI
- HOU
1 stop7h 10m
American Airlines
Deal found 6/16![American Airlines logo]()
$330
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:25 am
HOU
- MDW
2 stops5h 30m
Southwest
Mon 8/171:05 pm
MDW
- HOU
1 stop5h 20m
Southwest
Deal found 6/15![Southwest logo]()
$273
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:15 pm
IAH
- ORD
2 stops8h 42m
Delta
Sat 8/156:00 am
ORD
- IAH
1 stop8h 09m
Delta
Deal found 6/15![Delta logo]()
$242
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:25 am
IAH
- PIA
1 stop6h 35m
United Airlines
Tue 8/258:29 am
PIA
- IAH
1 stop5h 07m
United Airlines
Deal found 6/14![United Airlines logo]()
$357
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:55 pm
HOU
- MDW
Nonstop2h 20m
Southwest
Sun 8/167:20 am
MDW
- HOU
Nonstop2h 30m
Southwest
Deal found 6/16![Southwest logo]()
$280
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:28 am
IAH
- ORD
1 stop4h 49m
Delta
Tue 8/181:59 pm
ORD
- IAH
2 stops9h 53m
Delta
Deal found 6/15![Delta logo]()
$242
Last-minute flights from Houston to IllinoisDiscover last-minute flight deals from Houston to Illinois. Data last updated June 19, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Illinois. Data last updated June 19, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/249:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 7/15:29 pm
ORD
- IAH
Nonstop3h 23m
Frontier
Deal found 6/17![Frontier logo]()
$198
This Super.com deal was found by Cheapflights users on 6/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/249:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Tue 6/305:29 pm
ORD
- IAH
Nonstop3h 23m
Frontier
Deal found 6/14![Frontier logo]()
$203
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 7/295:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/18![Frontier logo]()
$191
This Super.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 7/155:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/15![Frontier logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/279:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Tue 6/305:29 pm
ORD
- IAH
Nonstop3h 23m
Frontier
Deal found 6/17![Frontier logo]()
$199
This eDestinos deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/279:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Fri 7/315:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/15![Frontier logo]()
$210
This Super.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/289:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Thu 8/205:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/17![Frontier logo]()
$208
This Priceline deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/289:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Sat 8/85:30 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/17![Frontier logo]()
$211
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:35 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Wed 7/157:10 pm
MDW
- HOU
Nonstop2h 35m
Southwest
Deal found 6/16![Southwest logo]()
$209
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:25 pm
HOU
- MDW
Nonstop2h 30m
Southwest
Tue 7/219:00 am
MDW
- HOU
1 stop5h 00m
Southwest
Deal found 6/16![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:25 pm
HOU
- MDW
Nonstop2h 30m
Southwest
Wed 7/2210:15 am
MDW
- HOU
1 stop3h 50m
Southwest
Deal found 6/15![Southwest logo]()
$215
This Southwest deal was found by Cheapflights users on 6/14. 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.
Tue 7/289:25 pm
HOU
- MDW
Nonstop2h 30m
Southwest
Thu 8/65:55 am
MDW
- HOU
Nonstop2h 30m
Southwest
Deal found 6/14![Southwest logo]()
$217
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 June 19, 2026.
Search for one-way flight options from Houston to Illinois. Find affordable one-way fares based on user searches. Data last updated June 19, 2026.
This Super.com deal was found by Cheapflights users on 6/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/14![Frontier logo]()
$79
This Trip.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/148:50 am
IAH
- STL
1 stop8h 47m
Frontier
Deal found 6/16![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:42 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/16![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/228:02 pm
IAH
- STL
1 stop21h 35m
Frontier
Deal found 6/18![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:02 pm
IAH
- STL
1 stop21h 35m
Frontier
Deal found 6/18![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/199:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/18![Frontier logo]()
$88
This Trip.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/78:50 am
IAH
- STL
1 stop8h 47m
Frontier
Deal found 6/15![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/169:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/16![Frontier logo]()
$92
This Trip.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:50 am
IAH
- STL
1 stop8h 47m
Frontier
Deal found 6/18![Frontier logo]()
$93
This Super.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/209:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/17![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/410:08 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/18![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:16 pm
IAH
- STL
1 stop20h 41m
Frontier
Deal found 6/16![Frontier logo]()
$95
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 June 19, 2026.
Round-trip from | $134 (Kiwi.com) |
|---|---|
One-way from | $79 (Super.com) |
Popular in | May |
Cheapest in | January |
Average price | $278 |
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 June 19, 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 - MDW
HOUMDW
Houston Hobby
Sat 8/15
7:40 pm-10:00 pm
Nonstop2h 20m
Chicago Midway
Tue 8/18
10:10 am-2:00 pm
1 stop3h 50m
$223
HoustonChicago
IAH - MDW
IAHMDW
Houston George Bush Intcntl
Tue 7/14
6:30 am-1:09 pm
1 stop6h 39m
Chicago Midway
Wed 7/22
6:00 am-1:33 pm
1 stop7h 33m
$229
HoustonChicago
IAH - ORD
IAHORD
Houston George Bush Intcntl
Mon 7/20
9:58 pm-12:49 am
Nonstop2h 51m
Chicago O'Hare Intl
Sun 7/26
9:57 pm-10:34 am
1 stop12h 37m
$230
HoustonChicago
HOU - MDW
HOUMDW
Houston Hobby
Sat 8/15
10:25 am-2:15 pm
1 stop3h 50m
Chicago Midway
Sat 8/15
6:05 pm-8:40 pm
Nonstop2h 35m
$231
HoustonChicago
HOU - MDW
HOUMDW
Houston Hobby
Sat 9/5
7:15 am-9:45 am
Nonstop2h 30m
Chicago Midway
Tue 9/8
7:40 am-1:45 pm
2 stops6h 05m
$232
HoustonChicago
IAH - ORD
IAHORD
Houston George Bush Intcntl
Wed 8/12
3:15 pm-8:30 pm
1 stop5h 15m
Chicago O'Hare Intl
Tue 8/18
6:00 am-2:20 pm
2 stops8h 20m
$234
HoustonChicago
HOU - ORD
HOUORD
Houston Hobby
Tue 8/4
10:50 am-8:30 pm
2 stops9h 40m
Chicago O'Hare Intl
Tue 8/11
6:40 am-12:16 pm
1 stop5h 36m
$234
HoustonChicago
HOU - ORD
HOUORD
Houston Hobby
Tue 7/28
6:00 am-4:23 pm
2 stops10h 23m
Chicago O'Hare Intl
Wed 8/5
5:30 am-12:16 pm
1 stop6h 46m
$234
HoustonChicago
IAH - MDW
IAHMDW
Houston George Bush Intcntl
Tue 10/6
3:40 pm-10:10 pm
1 stop6h 30m
Chicago Midway
Sat 10/10
9:30 am-2:44 pm
1 stop5h 14m
$237
HoustonChicago
HOU - ORD
HOUORD
Houston Hobby
Tue 10/6
1:00 pm-8:20 pm
1 stop7h 20m
Chicago O'Hare Intl
Sat 10/10
3:35 pm-9:43 pm
1 stop6h 08m
$237
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-PIA
IAH-ORD
IAH-MLI
HOU-PIA
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-PIA
IAH-ORD
IAH-MLI
What is the cheapest month to book a flight from Houston to Illinois?
Currently, September is the cheapest month in which you can book a flight from Houston to Illinois (average of $173). Flying from Houston to Illinois in January is currently the most expensive (average of $650). 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 June 19, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 49% 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?
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. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 19, 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.
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
7.9
Boarding
8.1
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 June 19, 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 5 airlines flying from Houston to Illinois
Discover the top 5 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 June 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$59 | Average$181 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$157 | Average$348 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$354 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$172 | Average$379 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$349 | FlexibilityNo cancel fee | On-timeN/A |