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$45+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
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 9, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/7. 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
Tue 1/65:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Deal found 12/7$91
This WAYA deal was found by Cheapflights users on 12/7. 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 WAYA 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 1/277:50 amIAH - ORD
1 stop6h 08mMultiple Airlines
Deal found 12/7$96
This Cheapflightsfares deal was found by Cheapflights users on 12/7. 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.
Wed 12/319:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Thu 1/15:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Deal found 12/7$104
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 12/159:14 pmORD - IAH
Nonstop2h 45mMultiple Airlines
Wed 12/317:55 pmIAH - ORD
Nonstop2h 50mMultiple Airlines
Deal found 12/7$109
This Frontier deal was found by Cheapflights users on 12/7. 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 12/155:17 pmORD - IAH
Nonstop3h 08mFrontier
Thu 1/812:26 pmIAH - ORD
Nonstop2h 46mFrontier
Deal found 12/7$110
This Frontier deal was found by Cheapflights users on 12/6. 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.
Mon 12/155:17 pmORD - IAH
Nonstop3h 08mFrontier
Thu 12/254:21 pmIAH - ORD
Nonstop3h 00mFrontier
Deal found 12/6$113
This Frontier deal was found by Cheapflights users on 12/6. 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.
Sun 12/142:01 pmMDW - IAH
Nonstop3h 07mFrontier
Fri 12/266:08 pmIAH - MDW
Nonstop2h 37mFrontier
Deal found 12/6$114
This Frontier deal was found by Cheapflights users on 12/7. 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 12/155:17 pmORD - IAH
Nonstop3h 08mFrontier
Wed 12/317:55 pmIAH - ORD
Nonstop2h 50mFrontier
Deal found 12/7$114
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 12/155:17 pmORD - IAH
Nonstop3h 08mMultiple Airlines
Sat 1/1011:38 amIAH - ORD
Nonstop2h 39mMultiple Airlines
Deal found 12/7$116
This Frontier deal was found by Cheapflights users on 12/7. 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.
Tue 12/1610:00 amORD - IAH
1 stop10h 53mFrontier
Thu 1/812:26 pmIAH - ORD
Nonstop2h 46mFrontier
Deal found 12/7$117
This deal was found by Cheapflights users on 12/7. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/155:17 pmORD - IAH
Nonstop3h 08mFrontier
Sun 1/114:40 pmIAH - ORD
Nonstop3h 00mFrontier
Deal found 12/7$118
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 12/159:14 pmORD - IAH
Nonstop2h 45mMultiple Airlines
Sun 1/114:40 pmIAH - ORD
Nonstop3h 00mMultiple Airlines
Deal found 12/7$119

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 9, 2025.

Round-trip from

$90
(CheapOair)

One-way from

$45
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$253
From Illinois to Houston
Search Deals
One-way flight from Illinois to Houston
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($10 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 9, 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

Fri 1/16

7:50 pm-10:58 pm

Nonstop3h 08m

Houston George Bush Intcntl

Sun 1/18

7:20 am-10:07 am

Nonstop2h 47m

$177

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Wed 2/11

6:14 pm-11:56 pm

1 stop5h 42m

Houston George Bush Intcntl

Tue 2/17

12:42 pm-5:45 pm

1 stop5h 03m

$197

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Fri 1/23

6:15 am-9:15 am

Nonstop3h 00m

Houston Hobby

Mon 1/26

8:30 pm-10:55 pm

Nonstop2h 25m

$197

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Tue 2/10

6:00 am-11:31 am

1 stop5h 31m

Houston George Bush Intcntl

Wed 2/18

7:05 am-11:59 am

1 stop4h 54m

$197

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sun 2/8

6:00 am-11:31 am

1 stop5h 31m

Houston George Bush Intcntl

Tue 2/10

5:15 am-12:46 pm

1 stop7h 31m

$207

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sun 2/8

6:00 am-11:31 am

1 stop5h 31m

Houston George Bush Intcntl

Wed 2/18

7:05 am-11:59 am

1 stop4h 54m

$207

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fri 2/20

6:40 pm-11:56 pm

1 stop5h 16m

Houston George Bush Intcntl

Tue 2/24

9:54 am-5:45 pm

1 stop7h 51m

$207

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fri 1/16

5:31 pm-11:56 pm

1 stop6h 25m

Houston George Bush Intcntl

Sun 1/18

5:15 am-12:48 pm

1 stop7h 33m

$207

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Wed 2/11

1:26 pm-6:46 pm

1 stop5h 20m

Houston George Bush Intcntl

Thu 2/19

12:15 pm-5:37 pm

1 stop5h 22m

$207

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Wed 2/18

6:00 am-11:35 am

1 stop5h 35m

Houston George Bush Intcntl

Fri 2/20

7:05 am-11:59 am

1 stop4h 54m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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 9, 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. United Airlines provides one of the quickest options available for as low as $197. 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 $33. 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 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 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$64Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$75Average$173FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$132Average$340FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$160Average$394FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$178Average$343FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$287FlexibilityNo cancel feeOn-timeN/A

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