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$53+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Feb 18 — Feb 251
Mi 2/18
Mi 2/25
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 Januar 19, 2026.

Round-trip from

$87
(Priceline)

One-way from

$53
(Expedia)

Popular in

March

Cheapest in

September

Average price

$186
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. 2% potential increase in price ($6 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 Januar 19, 2026.

This Priceline deal was found by Cheapflights users on 1/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 2/218:05 am
ORD
-
IAH
Nonstop3h 24m
Multiple Airlines
So 2/225:15 am
IAH
-
ORD
Nonstop2h 39m
Multiple Airlines
Deal found 1/16$87
This CheapOair deal was found by Cheapflights users on 1/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fr 2/206:30 am
ORD
-
IAH
Nonstop3h 01m
Frontier
Sa 2/2112:24 pm
IAH
-
ORD
Nonstop2h 53m
Frontier
Deal found 1/19$88
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Fr 2/278:59 am
ORD
-
IAH
Nonstop3h 01m
Multiple Airlines
Sa 2/2812:24 pm
IAH
-
ORD
Nonstop2h 53m
Multiple Airlines
Deal found 1/16$89
This Super.com deal was found by Cheapflights users on 1/17. 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.
Mo 2/166:45 am
MDW
-
IAH
Nonstop3h 00m
Frontier
Mo 2/2310:30 am
IAH
-
MDW
Nonstop2h 38m
Frontier
Deal found 1/17$90
This CheapOair deal was found by Cheapflights users on 1/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 5/57:41 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Do 5/75:46 pm
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/17$90
This Super.com deal was found by Cheapflights users on 1/17. 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.
Fr 2/208:59 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Mo 2/235:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/17$91
This Travelocity deal was found by Cheapflights users on 1/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 5/67:41 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Do 5/215:46 pm
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/18$92
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
Mo 4/69:20 am
MDW
-
IAH
Nonstop3h 12m
Frontier
Fr 4/101:27 pm
IAH
-
MDW
Nonstop2h 32m
Frontier
Deal found 1/17$93
This Super.com deal was found by Cheapflights users on 1/17. 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.
Do 2/128:59 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Mo 2/165:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/17$93
This Frontier deal was found by Cheapflights users on 1/16. 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.
Fr 4/109:20 am
MDW
-
IAH
Nonstop3h 12m
Frontier
Mo 4/131:27 pm
IAH
-
MDW
Nonstop2h 32m
Frontier
Deal found 1/16$94
This Cheapflightsfares deal was found by Cheapflights users on 1/18. 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.
Mo 2/93:22 pm
ORD
-
IAH
Nonstop3h 00m
Spirit Airlines
Do 2/195:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/18$94
This Cheapflightsfares deal was found by Cheapflights users on 1/17. 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.
Mo 2/93:22 pm
ORD
-
IAH
Nonstop3h 00m
Spirit Airlines
Mi 2/113:00 pm
IAH
-
ORD
1 stop6h 44m
Spirit Airlines
Deal found 1/17$95

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 Januar 19, 2026.
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

Sa 2/14

5:45 am-8:46 am

Nonstop3h 01m

Houston George Bush Intcntl

Di 2/17

5:00 am-7:46 am

Nonstop2h 46m

$177

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Mo 2/16

9:55 pm-12:40 am

Nonstop2h 45m

Houston Hobby

Sa 2/21

5:55 am-8:20 am

Nonstop2h 25m

$177

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Di 2/17

9:50 am-3:46 pm

1 stop5h 56m

Houston George Bush Intcntl

Di 2/24

4:25 pm-10:33 pm

1 stop6h 08m

$197

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

So 2/22

8:10 pm-11:13 pm

Nonstop3h 03m

Houston George Bush Intcntl

So 3/1

6:25 am-9:11 am

Nonstop2h 46m

$197

ChicagoHouston

ORD - HOU

ORDHOU

Chicago O'Hare Intl

Di 2/17

2:46 pm-10:28 pm

1 stop7h 42m

Houston Hobby

Mi 2/18

5:25 am-10:14 am

1 stop4h 49m

$197

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Di 3/10

8:10 pm-11:13 pm

Nonstop3h 03m

Houston George Bush Intcntl

Mo 3/16

5:00 am-7:46 am

Nonstop2h 46m

$197

MolineHouston

MLI - IAH

MLIIAH

Moline Quad-City

Di 3/31

12:40 pm-7:55 pm

1 stop7h 15m

Houston George Bush Intcntl

Sa 4/4

6:02 am-1:21 pm

1 stop7h 19m

$203

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fr 2/20

6:40 pm-12:11 am

1 stop5h 31m

Houston George Bush Intcntl

Sa 2/21

5:30 am-10:21 am

1 stop4h 51m

$207

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Do 2/19

6:40 pm-12:11 am

1 stop5h 31m

Houston George Bush Intcntl

Sa 2/21

5:30 am-10:21 am

1 stop4h 51m

$207

ChicagoHouston

ORD - HOU

ORDHOU

Chicago O'Hare Intl

Di 2/10

2:50 pm-10:33 pm

1 stop7h 43m

Houston Hobby

Mi 2/18

5:25 am-10:14 am

1 stop4h 49m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

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, August is the cheapest month in which you can book a flight from Illinois to Houston (average of $56). Flying from Illinois to Houston in June is currently the most expensive (average of $130). 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 Januar 19, 2026.

When flying from Illinois to Houston, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 21% versus a flight at noon.

What is the cheapest day to fly from Illinois to Houston?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Houston. Price data was last updated on January 17, 2026.

Travelers seeking maximum savings on their Illinois to Houston flight should consider departing on Tuesday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 45m. United Airlines provides one of the quickest options available for as low as $177. Illinois and Houston are separated by a distance of 938 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $36. However, be on the lookout for offers from Spirit Airlines and American Airlines, 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 George Bush Intcntl. You may also consider Chicago O'Hare Intl - Houston Hobby or Chicago Midway - 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, August is the cheapest month in which you can book a flight from Illinois to Houston (average of $56). Flying from Illinois to Houston in June is currently the most expensive (average of $130). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Houston

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Dallas/Fort Worth flights
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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 Januar 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$65Average$168FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$124Average$317FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$161Average$385FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$187Average$322FlexibilityNo cancel feeOn-time63%
DeltaCheapest$203Average$375FlexibilityNo cancel feeOn-timeN/A

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