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$52+ 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Frontier deal was found by Cheapflights users on 1/28. 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 4/298:25 am
ORD
-
IAH
Nonstop3h 07m
Frontier
Tue 5/512:27 pm
IAH
-
ORD
Nonstop2h 50m
Frontier
Deal found 1/28$83
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Tue 2/249:18 am
ORD
-
IAH
Nonstop3h 06m
Spirit Airlines
Sun 3/15:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/28$84
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Sun 2/228:59 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Wed 2/253:37 pm
IAH
-
ORD
Nonstop2h 41m
Spirit Airlines
Deal found 1/28$85
This CheapOair deal was found by Cheapflights users on 1/27. 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 2/197:00 am
ORD
-
IAH
Nonstop3h 22m
Multiple Airlines
Sun 2/225:15 am
IAH
-
ORD
Nonstop2h 39m
Multiple Airlines
Deal found 1/27$86
This CheapOair deal was found by Cheapflights users on 1/27. 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 2/267:00 am
ORD
-
IAH
Nonstop3h 22m
Frontier
Sun 3/111:17 am
IAH
-
ORD
Nonstop2h 48m
Frontier
Deal found 1/27$88
This Frontier deal was found by Cheapflights users on 1/27. 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 2/197:00 am
ORD
-
IAH
Nonstop3h 22m
Frontier
Sat 2/2112:24 pm
IAH
-
ORD
Nonstop2h 53m
Frontier
Deal found 1/27$89
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:59 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Mon 3/25:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/27$90
This Expedia deal was found by Cheapflights users on 1/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/17:00 am
ORD
-
IAH
Nonstop3h 22m
Multiple Airlines
Wed 3/47:21 am
IAH
-
ORD
1 stop11h 50m
Multiple Airlines
Deal found 1/28$91
This Frontier deal was found by Cheapflights users on 1/27. 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 2/133:00 pm
MDW
-
IAH
Nonstop3h 06m
Frontier
Sun 2/226:51 pm
IAH
-
MDW
Nonstop2h 38m
Frontier
Deal found 1/27$92
This Frontier deal was found by Cheapflights users on 1/28. 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 2/165:40 am
ORD
-
IAH
Nonstop3h 16m
Frontier
Fri 2/2010:26 am
IAH
-
ORD
Nonstop2h 54m
Frontier
Deal found 1/28$92
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 2/128:59 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Thu 2/195:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Deal found 1/27$93
This Frontier deal was found by Cheapflights users on 1/28. 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.
Sat 2/218:05 am
ORD
-
IAH
Nonstop3h 24m
Frontier
Tue 3/36:15 am
IAH
-
ORD
1 stop10h 37m
Frontier
Deal found 1/28$94

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 January 29, 2026.

Round-trip from

$83
(Frontier)

One-way from

$52
(Kiwi.com)

Popular in

May

Cheapest in

September

Average price

$186
From Illinois to Houston
Search Deals
One-way flight from Illinois to Houston
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 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

Fri 2/13

4:42 pm-7:34 pm

1 stop26h 52m

Houston George Bush Intcntl

Mon 2/16

5:15 am-7:54 am

Nonstop2h 39m

$160

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 3/21

5:20 am-8:36 am

Nonstop3h 16m

Houston George Bush Intcntl

Sat 3/21

4:51 pm-7:45 pm

Nonstop2h 54m

$163

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 2/28

12:45 pm-3:48 pm

Nonstop3h 03m

Houston George Bush Intcntl

Sat 2/28

6:35 pm-9:28 pm

Nonstop2h 53m

$164

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Tue 3/24

9:05 pm-11:50 pm

Nonstop2h 45m

Houston Hobby

Wed 3/25

6:15 am-8:35 am

Nonstop2h 20m

$191

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Thu 3/5

8:10 pm-11:13 pm

Nonstop3h 03m

Houston George Bush Intcntl

Mon 3/9

9:30 pm-11:59 pm

Nonstop2h 29m

$197

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Fri 2/27

8:10 pm-11:13 pm

Nonstop3h 03m

Houston George Bush Intcntl

Sun 3/1

5:00 am-7:47 am

Nonstop2h 47m

$197

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 2/18

3:49 pm-7:55 am

1 stop16h 06m

Houston George Bush Intcntl

Sun 2/22

8:18 pm-11:59 pm

1 stop27h 41m

$200

MolineHouston

MLI - IAH

MLIIAH

Moline Quad-City

Tue 3/24

2:02 pm-8:00 pm

1 stop5h 58m

Houston George Bush Intcntl

Tue 3/31

6:48 pm-11:37 pm

1 stop4h 49m

$203

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Wed 3/11

6:07 pm-11:59 pm

1 stop5h 52m

Houston George Bush Intcntl

Wed 3/18

11:39 am-5:54 pm

1 stop6h 15m

$204

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Tue 3/10

12:47 pm-5:49 pm

1 stop5h 02m

Houston George Bush Intcntl

Sat 3/14

5:25 am-12:29 pm

1 stop7h 04m

$204

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

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 January 29, 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 24, 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. Monday 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. Frontier provides one of the quickest options available for as low as $191. 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 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 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

Browse thousands of different options on Cheapflights for your next trip

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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.
O'Hare Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
Newark to Dallas/Fort Worth flights
Dulles Intl to Dallas/Fort Worth flights
LaGuardia to Dallas/Fort Worth flights
Newark to Hobby flights
John F Kennedy Intl to Hobby flights
LaGuardia to Hobby flights
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Reagan-National to Dallas/Fort Worth flights
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O'Hare Intl to Austin flights
Reagan-National to George Bush Intcntl flights
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LaGuardia to George Bush Intcntl flights
Baltimore to Hobby flights
Newark to Austin flights
Dulles Intl to George Bush Intcntl flights
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Philadelphia to George Bush Intcntl flights
Philadelphia to Dallas/Fort Worth flights
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Dulles Intl to Austin flights
Midway to Hobby flights
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Ontario to Hobby flights
O'Hare Intl to George Bush Intcntl flights
Denver to Hobby flights
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San Francisco to Hobby flights
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O'Hare Intl to Hobby flights
Sky Harbor Intl to Dallas/Fort Worth 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$173FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$66Average$153FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$125Average$319FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$164Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$187Average$323FlexibilityNo cancel feeOn-time63%
DeltaCheapest$203Average$375FlexibilityNo cancel feeOn-timeN/A

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