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$55+ Cheap flights from Illinois to Houston

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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Illinois to Houston

Keep the following information in mind while searching for Illinois to Houston flight deals. Data was last updated August 18, 2025.

Round-trip from

$94
(Kiwi.com)

One-way from

$55
(FlightHub)

Popular in

March

Cheapest in

October

Average price

$191
From Illinois to Houston
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One-way flight from Illinois to Houston
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Highest demand for flights based on searches. 6% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Illinois to Houston

Cheapest flights from Illinois to Houston
Explore the most affordable flight options available from Illinois to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/18. 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 11/61:36 pmORD - IAH
Nonstop2h 57mMultiple Airlines
Tue 11/114:29 pmIAH - ORD
Nonstop2h 47mMultiple Airlines
Deal found 8/18$94
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/172:04 pmORD - IAH
Nonstop2h 46mSpirit Airlines
Wed 12/38:51 pmIAH - ORD
1 stop9h 34mSpirit Airlines
Deal found 8/18$95
This Cheapflightsfares deal was found by Cheapflights users on 8/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:30 amMDW - IAH
Nonstop2h 48mFrontier
Thu 9/2510:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 8/18$96
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/81:26 pmORD - IAH
Nonstop2h 48mMultiple Airlines
Mon 10/2010:12 pmIAH - ORD
Nonstop2h 32mMultiple Airlines
Deal found 8/18$96
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:30 amMDW - IAH
Nonstop2h 48mFrontier
Mon 9/226:09 pmIAH - MDW
Nonstop2h 37mFrontier
Deal found 8/17$97
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/158:56 pmORD - IAH
Nonstop2h 49mSpirit Airlines
Tue 9/2310:23 amIAH - ORD
Nonstop2h 46mSpirit Airlines
Deal found 8/17$97
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:30 amMDW - IAH
Nonstop2h 48mFrontier
Sun 9/2110:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 8/17$98
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/184:03 pmORD - IAH
Nonstop3h 07mFrontier
Mon 9/228:00 pmIAH - ORD
Nonstop2h 45mFrontier
Deal found 8/17$98
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.
Fri 9/122:26 pmMDW - IAH
Nonstop2h 48mFrontier
Fri 9/196:09 pmIAH - MDW
Nonstop2h 37mFrontier
Deal found 8/17$99
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Mon 10/64:03 pmORD - IAH
Nonstop3h 07mMultiple Airlines
Tue 10/215:09 pmIAH - ORD
Nonstop2h 43mMultiple Airlines
Deal found 8/18$99
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.
Fri 9/122:26 pmMDW - IAH
Nonstop2h 48mFrontier
Mon 9/226:09 pmIAH - MDW
Nonstop2h 37mFrontier
Deal found 8/17$100
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.
Fri 9/124:03 pmORD - IAH
Nonstop3h 07mFrontier
Thu 9/258:00 pmIAH - ORD
Nonstop2h 45mFrontier
Deal found 8/17$100

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Houston 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, 2025.
Use the filters below to find and compare flights from Illinois to Houston that are best for you.

Fly from

Illinois

Fly to

Houston

Route

Depart

Return

Price

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Thu 11/6

1:36 pm-4:33 pm

Nonstop2h 57m

Houston George Bush Intcntl

Sat 11/8

4:29 pm-7:16 pm

Nonstop2h 47m

$94

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Fri 9/26

8:56 pm-11:45 pm

Nonstop2h 49m

Houston George Bush Intcntl

Wed 10/1

10:23 am-1:09 pm

Nonstop2h 46m

$94

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Tue 9/16

10:27 am-9:07 pm

1 stop10h 40m

Houston George Bush Intcntl

Tue 9/23

10:23 am-1:09 pm

Nonstop2h 46m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Mon 9/22

4:03 pm-7:10 pm

Nonstop3h 07m

Houston George Bush Intcntl

Tue 9/23

10:23 am-1:09 pm

Nonstop2h 46m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Wed 9/10

10:27 am-9:07 pm

1 stop10h 40m

Houston George Bush Intcntl

Sat 9/13

5:05 pm-7:50 pm

Nonstop2h 45m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Mon 9/29

4:03 pm-7:10 pm

Nonstop3h 07m

Houston George Bush Intcntl

Wed 10/1

10:23 am-1:09 pm

Nonstop2h 46m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 9/20

11:57 am-11:56 pm

1 stop11h 59m

Houston George Bush Intcntl

Wed 9/24

10:23 am-1:09 pm

Nonstop2h 46m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Thu 9/11

4:03 pm-7:10 pm

Nonstop3h 07m

Houston George Bush Intcntl

Sat 9/13

7:57 am-10:42 am

Nonstop2h 45m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Wed 9/10

2:04 pm-4:50 pm

Nonstop2h 46m

Houston George Bush Intcntl

Wed 9/17

12:47 pm-10:48 pm

1 stop10h 01m

$95

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 9/6

8:56 pm-11:45 pm

Nonstop2h 49m

Houston George Bush Intcntl

Tue 9/16

10:23 am-1:09 pm

Nonstop2h 46m

$95

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Houston

Have a flexible travel schedule? Discover the best time to fly to Houston from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Houston

What is the cheapest month to book a flight from Illinois to Houston?

Currently, September is the cheapest month in which you can book a flight from Illinois to Houston (average of $230). Flying from Illinois to Houston in March is currently the most expensive (average of $331). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to HOU?

Find hourly flight availability from Illinois to Houston. 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, 2025.

When flying from Illinois to Houston, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Houston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Houston?

    A quick flight from Illinois to Houston can take about 2h 35m. Spirit Airlines provides one of the quickest options available for as low as $157. Illinois and Houston are separated by a distance of 938 mi. All flights are typically nonstop.

  • What are the cheapest airlines to fly from Illinois to Houston one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $55. However, be on the lookout for offers from Frontier and Southwest, as they are both options that can get you from Illinois to Houston for a low price.

  • What are the most popular routes from Illinois to Houston?

    The most popular route from Illinois to Houston is Chicago O'Hare Intl - Houston Hobby. You may also consider Chicago Midway - Houston Hobby or Chicago O'Hare Intl - Houston George Bush Intcntl.

  • Can I find deals for flights from Illinois to Houston that include hotel bookings?

    Yes. In addition to deals on Illinois to Houston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Houston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Houston.

  • Can I find deals for business class flights from Illinois to Houston?

    Yes. Cheapflights offers flight deals from Illinois to Houston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Houston?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Houston (average of $230). Flying from Illinois to Houston in March is currently the most expensive (average of $331). 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.

See more FAQs

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Alternative routes for Illinois to Houston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Illinois to Houston

Discover the top 6 airlines that operate flights from Illinois to Houston. 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, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$171FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$174FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$157Average$394FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$177Average$359FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$181Average$345FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$312FlexibilityNo cancel feeOn-timeN/A

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