$76+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Jul 6 — Jul 131
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 6, 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 6, 2026.
This Frontier deal was found by Cheapflights users on 6/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:52 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Thu 8/275:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/2![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.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
Tue 7/147:05 am
ORD
- IAH
1 stop24h 15m
Frontier
Deal found 6/3![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 6/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/309:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Sat 8/85:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/3![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/288:50 am
IAH
- ORD
1 stop11h 03m
Frontier
Thu 7/305:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/3![Frontier logo]()
$131
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/319:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Sat 8/85:30 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/4![Frontier logo]()
$132
This Super.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 9/59:52 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 9/92:46 pm
ORD
- IAH
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:52 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Thu 9/35:29 pm
ORD
- IAH
Nonstop3h 28m
Frontier
Deal found 6/2![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:35 pm
IAH
- ORD
1 stop6h 53m
Frontier
Tue 10/202:46 pm
ORD
- IAH
Nonstop3h 01m
Frontier
Deal found 6/3![Frontier logo]()
$135
This Frontier deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 9/146:42 pm
IAH
- ORD
Nonstop2h 52m
Frontier
Wed 9/162:46 pm
ORD
- IAH
Nonstop3h 01m
Frontier
Deal found 6/5![Frontier logo]()
$137
This Frontier deal was found by Cheapflights users on 6/1. 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.
Fri 7/179:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Tue 7/215:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/1![Frontier logo]()
$138
This Frontier deal was found by Cheapflights users on 6/3. 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 7/259:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Mon 7/275:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/3![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:53 am
IAH
- ORD
1 stop9h 00m
Frontier
Sat 7/255:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/2![Frontier logo]()
$140
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 6, 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 6, 2026.
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/1510:25 am
HOU
- MDW
1 stop5h 30m
Southwest
Tue 7/2110:15 am
MDW
- HOU
1 stop3h 50m
Southwest
Deal found 6/4![Southwest logo]()
$224
This Delta deal was found by Cheapflights users on 6/1. 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 8/43:15 pm
IAH
- ORD
1 stop5h 12m
Delta
Tue 8/1111:22 am
ORD
- IAH
1 stop7h 10m
Delta
Deal found 6/1![Delta logo]()
$229
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:02 am
IAH
- MLI
1 stop4h 37m
American Airlines
Sat 7/116:50 pm
MLI
- IAH
1 stop5h 01m
American Airlines
Deal found 6/5![American Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 6/2. 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 6/248:30 pm
IAH
- STL
Nonstop2h 15m
United Airlines
Sun 6/285:10 am
STL
- IAH
1 stop6h 04m
United Airlines
Deal found 6/2![United Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 6/1. 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.
Wed 7/296:34 pm
IAH
- ORD
1 stop5h 19m
Delta
Tue 8/411:22 am
ORD
- IAH
1 stop7h 10m
Delta
Deal found 6/1![Delta logo]()
$229
This Delta deal was found by Cheapflights users on 6/2. 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.
Tue 8/115:34 am
IAH
- MDW
1 stop6h 17m
Delta
Wed 8/1912:46 pm
MDW
- IAH
1 stop4h 54m
Delta
Deal found 6/2![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/35:40 pm
HOU
- MDW
1 stop4h 15m
Southwest
Tue 7/73:10 pm
MDW
- HOU
2 stops5h 30m
Southwest
Deal found 6/5![Southwest logo]()
$266
This Delta deal was found by Cheapflights users on 6/1. 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.
Wed 7/2911:32 am
IAH
- MDW
1 stop6h 53m
Delta
Tue 8/410:54 am
MDW
- IAH
1 stop5h 03m
Delta
Deal found 6/1![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 6/2. 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.
Wed 7/296:00 pm
HOU
- MDW
1 stop4h 00m
Southwest
Wed 8/57:40 am
MDW
- HOU
2 stops6h 05m
Southwest
Deal found 6/2![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/125:34 am
IAH
- MDW
2 stops7h 05m
Delta
Wed 8/191:27 pm
MDW
- IAH
2 stops10h 25m
Delta
Deal found 6/4![Delta logo]()
$239
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/176:03 am
HOU
- MLI
1 stop4h 36m
American Airlines
Wed 7/111:09 am
MLI
- HOU
1 stop7h 09m
American Airlines
Deal found 6/1![American Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/1711:28 am
IAH
- MDW
1 stop7h 05m
Delta
Tue 8/186:05 am
MDW
- IAH
1 stop5h 10m
Delta
Deal found 6/4![Delta logo]()
$247
This Southwest deal was found by Cheapflights users on 6/2. 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 8/135:45 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Sun 8/167:15 am
MDW
- HOU
1 stop5h 00m
Southwest
Deal found 6/2![Southwest logo]()
$300
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:21 pm
IAH
- BMI
1 stop6h 32m
American Airlines
Sun 9/65:00 am
BMI
- IAH
2 stops10h 31m
American Airlines
Deal found 6/1![American Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 am
HOU
- STL
1 stop4h 15m
Southwest
Tue 11/37:40 am
STL
- HOU
2 stops6h 20m
Southwest
Deal found 6/5![Southwest logo]()
$302
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Sat 6/205:04 am
IAH
- MLI
1 stop4h 55m
United Airlines
Sun 6/216:30 pm
MLI
- IAH
1 stop6h 00m
United Airlines
Deal found 6/2![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 6/3. 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.
Tue 7/2812:55 pm
HOU
- ORD
1 stop7h 38m
Delta
Thu 7/305:30 am
ORD
- HOU
1 stop6h 40m
Delta
Deal found 6/3![Delta logo]()
$264
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:41 pm
IAH
- BMI
1 stop5h 54m
American Airlines
Mon 7/65:45 pm
BMI
- IAH
1 stop6h 06m
American Airlines
Deal found 6/5![American Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 11/1911:05 am
IAH
- STL
1 stop5h 21m
United Airlines
Tue 11/244:17 pm
STL
- IAH
Nonstop2h 18m
United Airlines
Deal found 6/5![United Airlines logo]()
$411
This Delta deal was found by Cheapflights users on 6/1. 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 9/15:20 pm
HOU
- ORD
1 stop6h 42m
Delta
Thu 9/35:28 am
ORD
- HOU
1 stop6h 48m
Delta
Deal found 6/1![Delta logo]()
$264
This Southwest deal was found by Cheapflights users on 6/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/38:35 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Mon 7/66:40 am
MDW
- HOU
Nonstop2h 35m
Southwest
Deal found 6/3![Southwest logo]()
$324
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1211:08 am
IAH
- MLI
1 stop7h 14m
American Airlines
Mon 6/1511:11 am
MLI
- IAH
1 stop5h 16m
American Airlines
Deal found 6/1![American Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1012:00 pm
IAH
- STL
Nonstop2h 16m
United Airlines
Sun 7/126:14 am
STL
- IAH
Nonstop2h 17m
United Airlines
Deal found 6/3![United Airlines logo]()
$415
This Southwest deal was found by Cheapflights users on 6/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:25 am
HOU
- STL
Nonstop2h 00m
Southwest
Sat 10/101:45 pm
STL
- HOU
Nonstop2h 00m
Southwest
Deal found 6/3![Southwest logo]()
$325
This Delta deal was found by Cheapflights users on 6/2. 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.
Wed 8/265:20 pm
HOU
- MLI
1 stop5h 08m
Delta
Mon 8/315:09 pm
MLI
- HOU
1 stop4h 56m
Delta
Deal found 6/2![Delta logo]()
$276
This United Airlines deal was found by Cheapflights users on 6/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/412:40 pm
IAH
- STL
Nonstop2h 11m
United Airlines
Mon 7/66:14 am
STL
- IAH
Nonstop2h 17m
United Airlines
Deal found 6/3![United Airlines logo]()
$415
This American Airlines deal was found by Cheapflights users on 6/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:03 am
HOU
- MLI
1 stop4h 36m
American Airlines
Tue 7/711:09 am
MLI
- HOU
1 stop7h 10m
American Airlines
Deal found 6/3![American Airlines logo]()
$387
This Southwest deal was found by Cheapflights users on 6/1. 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.
Thu 8/207:20 am
HOU
- STL
Nonstop2h 00m
Southwest
Mon 8/2410:55 am
STL
- HOU
Nonstop2h 00m
Southwest
Deal found 6/1![Southwest logo]()
$325
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Thu 7/212:00 pm
IAH
- STL
Nonstop2h 16m
United Airlines
Mon 7/66:14 am
STL
- IAH
Nonstop2h 17m
United Airlines
Deal found 6/2![United Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/1211:28 am
IAH
- ORD
2 stops9h 22m
Delta
Fri 8/146:51 am
ORD
- IAH
2 stops10h 49m
Delta
Deal found 6/4![Delta logo]()
$284
Last-minute flights from Houston to IllinoisDiscover last-minute flight deals from Houston to Illinois. Data last updated June 6, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Illinois. Data last updated June 6, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 6/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/119:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 7/85:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/2![Frontier logo]()
$186
This Super.com deal was found by Cheapflights users on 6/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/139:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 7/85:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/2![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 6/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/139:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 8/55:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/3![Frontier logo]()
$159
This Super.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 6/139:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Tue 6/165:29 pm
ORD
- IAH
Nonstop3h 23m
Frontier
Deal found 6/5![Frontier logo]()
$209
This Super.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 6/139:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 6/175:29 pm
ORD
- IAH
Nonstop3h 23m
Frontier
Deal found 6/5![Frontier logo]()
$210
This Trip.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/149:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Wed 7/225:46 pm
ORD
- IAH
Nonstop3h 17m
Frontier
Deal found 6/6![Frontier logo]()
$191
This Super.com deal was found by Cheapflights users on 6/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/169:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Tue 6/235:29 pm
ORD
- IAH
Nonstop3h 23m
Frontier
Deal found 6/3![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2411:12 am
IAH
- MDW
1 stop10h 59m
Frontier
Tue 6/306:00 am
MDW
- IAH
1 stop25h 23m
Frontier
Deal found 6/3![Frontier logo]()
$162
This Southwest deal was found by Cheapflights users on 6/2. 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.
Tue 6/302:35 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Tue 7/710:15 am
MDW
- HOU
1 stop3h 50m
Southwest
Deal found 6/2![Southwest logo]()
$215
This Southwest deal was found by Cheapflights users on 6/2. 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.
Tue 7/74:05 pm
HOU
- MDW
Nonstop2h 25m
Southwest
Wed 7/87:10 am
MDW
- HOU
Nonstop2h 35m
Southwest
Deal found 6/2![Southwest logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/1510:53 am
IAH
- MDW
1 stop11h 10m
Frontier
Tue 7/2112:11 pm
MDW
- IAH
1 stop19h 09m
Frontier
Deal found 6/5![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:53 am
IAH
- MDW
1 stop11h 10m
Frontier
Tue 8/412:11 pm
MDW
- IAH
1 stop10h 28m
Frontier
Deal found 6/2![Frontier logo]()
$173
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 6, 2026.
Search for one-way flight options from Houston to Illinois. Find affordable one-way fares based on user searches. Data last updated June 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/810:53 am
IAH
- ORD
1 stop9h 00m
Frontier
Deal found 6/3![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 8/48:50 am
IAH
- STL
1 stop8h 47m
Frontier
Deal found 6/5![Frontier logo]()
$76
This Frontier deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 8/89:42 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/6![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:42 pm
IAH
- STL
1 stop20h 48m
Frontier
Deal found 6/3![Frontier logo]()
$78
This Trip.com deal was found by Cheapflights users on 6/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:30 am
IAH
- STL
1 stop11h 00m
Frontier
Deal found 6/2![Frontier logo]()
$81
This Trip.com deal was found by Cheapflights users on 6/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:02 pm
IAH
- STL
1 stop12h 55m
Frontier
Deal found 6/1![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/48:43 pm
IAH
- ORD
1 stop32h 54m
Frontier
Deal found 6/3![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 9/18:02 pm
IAH
- STL
1 stop12h 50m
Frontier
Deal found 6/4![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/179:58 pm
IAH
- ORD
Nonstop2h 51m
Frontier
Deal found 6/5![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/298:02 pm
IAH
- STL
1 stop21h 35m
Frontier
Deal found 6/5![Frontier logo]()
$88
This Priceline deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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.
Mon 6/299:58 pm
IAH
- ORD
Nonstop2h 50m
Frontier
Deal found 6/4![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:30 am
IAH
- ORD
1 stop25h 33m
Frontier
Deal found 6/2![Frontier logo]()
$90
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 6, 2026.
Round-trip from | $128 (Frontier) |
|---|---|
One-way from | $76 (Kiwi.com) |
Popular in | May |
Cheapest in | January |
Average price | $255 |
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 6, 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
Wed 7/15
10:25 am-3:55 pm
1 stop5h 30m
Chicago Midway
Tue 7/21
10:15 am-2:05 pm
1 stop3h 50m
$224
HoustonChicago
IAH - ORD
IAHORD
Houston George Bush Intcntl
Tue 8/4
3:15 pm-8:27 pm
1 stop5h 12m
Chicago O'Hare Intl
Tue 8/11
11:22 am-6:32 pm
1 stop7h 10m
$229
HoustonChicago
IAH - ORD
IAHORD
Houston George Bush Intcntl
Wed 7/29
6:34 pm-11:53 pm
1 stop5h 19m
Chicago O'Hare Intl
Tue 8/4
11:22 am-6:32 pm
1 stop7h 10m
$229
HoustonChicago
IAH - MDW
IAHMDW
Houston George Bush Intcntl
Tue 8/11
5:34 am-11:51 am
1 stop6h 17m
Chicago Midway
Wed 8/19
12:46 pm-5:40 pm
1 stop4h 54m
$229
HoustonChicago
IAH - MDW
IAHMDW
Houston George Bush Intcntl
Wed 7/29
11:32 am-6:25 pm
1 stop6h 53m
Chicago Midway
Tue 8/4
10:54 am-3:57 pm
1 stop5h 03m
$229
HoustonChicago
IAH - MDW
IAHMDW
Houston George Bush Intcntl
Wed 8/12
5:34 am-12:39 pm
2 stops7h 05m
Chicago Midway
Wed 8/19
1:27 pm-11:52 pm
2 stops10h 25m
$239
HoustonChicago
IAH - MDW
IAHMDW
Houston George Bush Intcntl
Mon 8/17
11:28 am-6:33 pm
1 stop7h 05m
Chicago Midway
Tue 8/18
6:05 am-11:15 am
1 stop5h 10m
$247
HoustonChicago
HOU - ORD
HOUORD
Houston Hobby
Tue 7/28
12:55 pm-8:33 pm
1 stop7h 38m
Chicago O'Hare Intl
Thu 7/30
5:30 am-12:10 pm
1 stop6h 40m
$264
HoustonChicago
HOU - ORD
HOUORD
Houston Hobby
Tue 9/1
5:20 pm-12:02 am
1 stop6h 42m
Chicago O'Hare Intl
Thu 9/3
5:28 am-12:16 pm
1 stop6h 48m
$264
HoustonChicago
HOU - MDW
HOUMDW
Houston Hobby
Fri 7/3
5:40 pm-9:55 pm
1 stop4h 15m
Chicago Midway
Tue 7/7
3:10 pm-8:40 pm
2 stops5h 30m
$266
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.
IAH-ORD
HOU-MDW
IAH-MDW
IAH-BMI
HOU-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 Houston to Illinois
HO1-USIL
IAH-ORD
HOU-MDW
IAH-MDW
IAH-BMI
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 $175). Flying from Houston to Illinois in January is currently the most expensive (average of $654). 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 6, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 51% 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 6, 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
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
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 6, 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 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$58 | Average$178 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$157 | Average$343 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$339 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$171 | Average$379 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$349 | FlexibilityNo cancel fee | On-timeN/A |