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$43+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/258:21 pmORD - IAH
Nonstop3h 06mMultiple Airlines
Wed 1/75:30 pmIAH - ORD
Nonstop2h 34mMultiple Airlines
Deal found 12/16$110
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/258:21 pmORD - IAH
Nonstop3h 06mMultiple Airlines
Sat 1/1011:38 amIAH - ORD
Nonstop2h 39mMultiple Airlines
Deal found 12/16$117
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Wed 1/75:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Deal found 12/16$122
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:09 pmORD - IAH
Nonstop2h 50mMultiple Airlines
Tue 1/68:13 pmIAH - ORD
1 stop20h 06mMultiple Airlines
Deal found 12/15$131
This Super.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/249:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Wed 12/315:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Deal found 12/15$134
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Tue 1/65:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Deal found 12/15$135
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/258:21 pmORD - IAH
Nonstop3h 06mMultiple Airlines
Fri 1/911:38 amIAH - ORD
Nonstop2h 39mMultiple Airlines
Deal found 12/16$136
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Fri 1/911:38 amIAH - ORD
Nonstop2h 39mSpirit Airlines
Deal found 12/16$143
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:09 pmORD - IAH
Nonstop2h 50mMultiple Airlines
Tue 1/68:00 amIAH - ORD
Nonstop2h 49mMultiple Airlines
Deal found 12/16$146
This Frontier deal was found by Cheapflights users on 12/16. 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.
Wed 12/242:16 pmMDW - IAH
Nonstop3h 07mFrontier
Wed 12/316:08 pmIAH - MDW
Nonstop2h 37mFrontier
Deal found 12/16$159
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/296:15 amMDW - IAH
1 stop27h 22mFrontier
Wed 12/316:08 pmIAH - MDW
Nonstop2h 37mFrontier
Deal found 12/16$169
This CheapOair deal was found by Cheapflights users on 12/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:12 amMDW - IAH
1 stop10h 53mFrontier
Sat 1/108:13 pmIAH - MDW
1 stop26h 46mFrontier
Deal found 12/15$188

Find flight deals from Illinois to Houston

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

Round-trip from

$85
(Frontier)

One-way from

$43
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$249
From Illinois to Houston
Search Deals
One-way flight from Illinois to Houston
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 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

MDW - IAH

MDWIAH

Chicago Midway

Thu 2/12

12:25 pm-10:51 pm

1 stop10h 26m

Houston George Bush Intcntl

Sun 2/15

6:51 pm-9:29 pm

Nonstop2h 38m

$133

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fri 1/16

5:25 pm-8:30 pm

Nonstop3h 05m

Houston George Bush Intcntl

Sun 1/18

4:15 pm-10:19 pm

1 stop6h 04m

$144

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 2/14

8:10 pm-11:13 pm

Nonstop3h 03m

Houston George Bush Intcntl

Sat 2/21

6:30 am-9:17 am

Nonstop2h 47m

$157

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fri 1/16

8:28 am-3:19 pm

1 stop6h 51m

Houston George Bush Intcntl

Fri 1/16

9:15 pm-11:47 pm

Nonstop2h 32m

$163

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Tue 1/13

11:39 am-8:06 pm

1 stop8h 27m

Houston George Bush Intcntl

Mon 1/19

8:09 pm-10:43 pm

Nonstop2h 34m

$166

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 1/17

3:43 pm-12:35 am

1 stop8h 52m

Houston George Bush Intcntl

Sun 1/18

7:45 am-6:51 am

2 stops23h 06m

$178

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Fri 2/6

9:23 am-10:56 pm

1 stop13h 33m

Houston George Bush Intcntl

Mon 2/16

11:44 am-2:23 pm

Nonstop2h 39m

$183

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 1/23

8:22 pm-11:11 am

2 stops14h 49m

Houston George Bush Intcntl

Wed 1/28

8:45 am-11:33 pm

1 stop14h 48m

$183

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 1/16

7:27 pm-3:15 pm

1 stop19h 48m

Houston George Bush Intcntl

Mon 1/19

8:16 pm-11:33 pm

1 stop27h 17m

$192

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sun 1/18

9:32 am-3:07 pm

1 stop5h 35m

Houston George Bush Intcntl

Wed 1/21

7:05 am-11:59 am

1 stop4h 54m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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 December 18, 2025.

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 51% versus a flight in the afternoon.

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 December 16, 2024.

Travelers seeking maximum savings on their Illinois to Houston flight should consider departing on Saturday evenings 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 3h 03m. Frontier provides one of the quickest options available for as low as $157. Illinois and Houston are separated by a distance of 926 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 Spirit Airlines, with whom users have recently found tickets for as low as $35. However, be on the lookout for offers from Frontier 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 Hobby. You may also consider Chicago O'Hare Intl - Houston George Bush Intcntl or Chicago Midway - Houston Hobby.

  • 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

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$67Average$173FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$75Average$172FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$131Average$337FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$393FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$178Average$343FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$287FlexibilityNo cancel feeOn-timeN/A

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