HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Houston

$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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Houston with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 15, 2025.

Round-trip from

$90
(Cheapflightsfares)

One-way from

$55
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$177
From Illinois to Houston
Search Deals
One-way flight from Illinois to Houston
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
Tue 11/187:35 amORD - IAH
Nonstop2h 45mSpirit Airlines
Tue 12/24:29 pmIAH - ORD
Nonstop2h 47mSpirit Airlines
Deal found 9/14$90
This Trip.com deal was found by Cheapflights users on 9/13. 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.
Sat 10/411:37 amORD - IAH
Nonstop2h 43mMultiple Airlines
Sun 10/58:00 pmIAH - ORD
Nonstop2h 45mMultiple Airlines
Deal found 9/13$91
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
Mon 9/222:26 pmMDW - IAH
Nonstop2h 48mFrontier
Sun 9/2810:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 9/14$92
This Booking.com deal was found by Cheapflights users on 9/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:35 amORD - IAH
Nonstop2h 45mSpirit Airlines
Sat 11/154:29 pmIAH - ORD
Nonstop2h 47mSpirit Airlines
Deal found 9/12$92
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 9/222:26 pmMDW - IAH
Nonstop2h 48mFrontier
Thu 9/2510:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 9/13$93
This Frontier deal was found by Cheapflights users on 9/13. 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 11/31:36 pmORD - IAH
Nonstop2h 57mFrontier
Thu 11/69:04 pmIAH - ORD
Nonstop2h 37mFrontier
Deal found 9/13$94
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:30 amMDW - IAH
Nonstop2h 52mFrontier
Sat 11/810:04 amIAH - MDW
Nonstop2h 33mFrontier
Deal found 9/15$95
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 11/61:36 pmORD - IAH
Nonstop2h 57mFrontier
Sun 11/99:04 pmIAH - ORD
Nonstop2h 37mFrontier
Deal found 9/14$95
This Frontier deal was found by Cheapflights users on 9/13. 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 10/91:14 pmORD - IAH
Nonstop2h 57mFrontier
Sun 10/199:54 pmIAH - ORD
Nonstop2h 32mFrontier
Deal found 9/13$96
This Frontier deal was found by Cheapflights users on 9/14. 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 10/311:36 pmORD - IAH
Nonstop2h 57mFrontier
Mon 11/39:04 pmIAH - ORD
Nonstop2h 37mFrontier
Deal found 9/14$97
This Trip.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/32:26 pmMDW - IAH
Nonstop2h 48mFrontier
Sun 10/510:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 9/13$99
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:03 pmORD - IAH
Nonstop3h 07mFrontier
Mon 10/67:55 pmIAH - ORD
Nonstop2h 48mFrontier
Deal found 9/15$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 September 15, 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

Sat 11/8

8:41 am-8:33 pm

1 stop11h 52m

Houston George Bush Intcntl

Sat 11/15

4:29 pm-7:16 pm

Nonstop2h 47m

$115

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Wed 10/29

9:08 pm-11:59 pm

Nonstop2h 51m

Houston George Bush Intcntl

Sat 11/1

8:05 am-10:46 am

Nonstop2h 41m

$133

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Thu 10/23

10:30 am-1:22 pm

Nonstop2h 52m

Houston George Bush Intcntl

Sun 10/26

2:12 pm-4:42 pm

Nonstop2h 30m

$141

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Thu 10/9

10:30 am-1:22 pm

Nonstop2h 52m

Houston George Bush Intcntl

Sun 10/12

6:00 am-9:31 am

1 stop27h 31m

$144

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sat 10/4

6:15 am-5:01 pm

1 stop10h 46m

Houston George Bush Intcntl

Mon 10/6

6:09 pm-8:46 pm

Nonstop2h 37m

$146

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Mon 9/22

8:49 pm-3:36 pm

1 stop18h 47m

Houston George Bush Intcntl

Sun 9/28

5:04 pm-4:51 pm

1 stop23h 47m

$151

ChicagoHouston

ORD - HOU

ORDHOU

Chicago O'Hare Intl

Wed 10/15

5:45 pm-10:10 pm

1 stop4h 25m

Houston Hobby

Sat 10/18

5:55 am-12:45 pm

1 stop6h 50m

$153

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sun 10/12

5:20 am-4:38 pm

1 stop11h 18m

Houston George Bush Intcntl

Mon 10/13

10:55 am-11:46 pm

1 stop12h 51m

$154

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fri 10/10

9:00 am-11:49 am

Nonstop2h 49m

Houston George Bush Intcntl

Mon 10/13

10:55 am-11:46 pm

1 stop12h 51m

$161

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Thu 10/23

5:00 pm-9:30 pm

1 stop4h 30m

Houston Hobby

Mon 10/27

10:25 pm-12:45 am

Nonstop2h 20m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 60 results
1
2
3
...
6

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 $330). 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 September 15, 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 51m. Spirit Airlines provides one of the quickest options available for as low as $133. 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 United Airlines, with whom users have recently found tickets for as low as $58. However, be on the lookout for offers from Spirit Airlines 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 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, 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 $330). 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.
LaGuardia to Dallas/Fort Worth flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
Seattle to Dallas/Fort Worth flights
Los Angeles to Dallas/Fort Worth flights
O'Hare Intl to Dallas/Fort Worth flights
Dulles Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Hobby flights
Newark to Hobby flights
LaGuardia to Hobby flights
Boston to Dallas/Fort Worth flights
Reagan-National to Dallas/Fort Worth flights
Baltimore to Dallas/Fort Worth flights
John F Kennedy Intl to George Bush Intcntl flights
San Francisco to Dallas/Fort Worth flights
John F Kennedy Intl to Austin flights
Newark to George Bush Intcntl flights
Los Angeles to Hobby flights
Atlanta to Dallas/Fort Worth flights
Philadelphia to Dallas/Fort Worth flights
Newark to Austin flights
Minneapolis to Dallas/Fort Worth flights
Los Angeles to Austin flights
Midway to Dallas/Fort Worth flights
Detroit to Dallas/Fort Worth flights
LaGuardia to George Bush Intcntl flights
Orlando to Dallas/Fort Worth flights
Denver to Dallas/Fort Worth flights
Reagan-National to Hobby flights
Seattle to Hobby flights
Santa Ana to Dallas/Fort Worth flights
Los Angeles to George Bush Intcntl flights
Dulles Intl to Hobby flights
Sky Harbor Intl to Dallas/Fort Worth flights
LaGuardia to Austin flights
Boston to Austin flights
Boston to Hobby flights
Dulles Intl to Austin flights
Baltimore to Hobby flights
Denver to Hobby flights
Burbank to Dallas/Fort Worth flights
Seattle to Austin flights
Salt Lake City to Dallas/Fort Worth flights
San Francisco to Hobby flights
Ontario to Dallas/Fort Worth flights
Philadelphia to Hobby flights
Seattle to George Bush Intcntl flights
Ontario to Hobby flights
Dulles Intl to George Bush Intcntl flights
O'Hare Intl to Austin flights

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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$170FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$176FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$157Average$388FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$170Average$348FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$182Average$349FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$315FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.