HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Houston

$61+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HOU
Jun 21 — Jun 281
Sun 6/21
Sun 6/28
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

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 May 22, 2026.

This Frontier deal was found by Cheapflights users on 5/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:29 pm
ORD
-
IAH
Nonstop3h 23m
Frontier
Fri 6/199:58 pm
IAH
-
ORD
Nonstop2h 50m
Frontier
Deal found 5/18$114
This Kiwi.com deal was found by Cheapflights users on 5/17. 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.
Sat 10/109:20 am
ORD
-
IAH
1 stop5h 45m
Frontier
Tue 10/136:42 pm
IAH
-
ORD
Nonstop2h 52m
Frontier
Deal found 5/17$115
This Kiwi.com deal was found by Cheapflights users on 5/20. 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.
Fri 10/162:46 pm
ORD
-
IAH
Nonstop3h 01m
Frontier
Mon 10/196:42 pm
IAH
-
ORD
Nonstop2h 52m
Frontier
Deal found 5/20$118
This Super.com deal was found by Cheapflights users on 5/20. 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.
Sat 6/205:29 pm
ORD
-
IAH
Nonstop3h 23m
Frontier
Mon 6/229:58 pm
IAH
-
ORD
Nonstop2h 50m
Frontier
Deal found 5/20$119
This Frontier deal was found by Cheapflights users on 5/21. 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 7/75:46 pm
ORD
-
IAH
Nonstop3h 17m
Frontier
Wed 7/159:58 pm
IAH
-
ORD
Nonstop2h 51m
Frontier
Deal found 5/21$120
This Super.com deal was found by Cheapflights users on 5/17. 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.
Sat 6/64:05 pm
ORD
-
IAH
Nonstop3h 12m
Frontier
Tue 6/99:58 pm
IAH
-
ORD
Nonstop2h 50m
Frontier
Deal found 5/17$122
This Kiwi.com deal was found by Cheapflights users on 5/17. 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.
Thu 7/95:46 pm
ORD
-
IAH
Nonstop3h 17m
Frontier
Sat 7/119:58 pm
IAH
-
ORD
Nonstop2h 51m
Frontier
Deal found 5/17$123
This Frontier deal was found by Cheapflights users on 5/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:29 pm
ORD
-
IAH
Nonstop3h 23m
Frontier
Wed 6/178:55 pm
IAH
-
ORD
1 stop11h 08m
Frontier
Deal found 5/18$124
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:46 pm
ORD
-
IAH
Nonstop3h 17m
Frontier
Tue 7/149:58 pm
IAH
-
ORD
Nonstop2h 51m
Frontier
Deal found 5/18$125
This Super.com deal was found by Cheapflights users on 5/20. 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.
Tue 7/75:46 pm
ORD
-
IAH
Nonstop3h 17m
Frontier
Fri 7/179:58 pm
IAH
-
ORD
Nonstop2h 51m
Frontier
Deal found 5/20$129
This Frontier deal was found by Cheapflights users on 5/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/215:29 pm
ORD
-
IAH
Nonstop3h 28m
Frontier
Sat 8/299:52 pm
IAH
-
ORD
Nonstop2h 50m
Frontier
Deal found 5/17$130
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:29 pm
ORD
-
IAH
Nonstop3h 23m
Frontier
Tue 7/149:58 pm
IAH
-
ORD
Nonstop2h 51m
Frontier
Deal found 5/18$132

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 May 22, 2026.

Round-trip from

$114
(Frontier)

One-way from

$61
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$297
From Illinois to Houston
Search Deals
One-way flight from Illinois to Houston
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 22, 2026.
Use the filters below to find and compare flights from Illinois to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Wed 7/29

11:05 am-4:13 pm

1 stop5h 08m

Houston George Bush Intcntl

Wed 8/5

5:20 am-12:39 pm

1 stop7h 19m

$209

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Tue 7/21

5:10 pm-11:57 pm

1 stop6h 47m

Houston George Bush Intcntl

Tue 7/28

2:38 pm-10:15 pm

1 stop7h 37m

$209

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Wed 7/15

6:35 am-1:33 pm

1 stop6h 58m

Houston George Bush Intcntl

Tue 7/21

2:35 pm-9:52 pm

1 stop7h 17m

$209

ChicagoHouston

ORD - HOU

ORDHOU

Chicago O'Hare Intl

Wed 7/29

1:44 pm-9:51 pm

1 stop8h 07m

Houston Hobby

Tue 8/4

6:00 am-2:05 pm

1 stop8h 05m

$209

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Tue 8/11

6:00 am-12:10 pm

1 stop6h 10m

Houston Hobby

Mon 8/17

5:00 am-7:25 am

Nonstop2h 25m

$214

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Wed 8/12

1:52 pm-10:46 pm

2 stops8h 54m

Houston Hobby

Tue 8/18

10:50 am-4:15 pm

1 stop5h 25m

$214

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 7/18

6:22 pm-11:59 pm

1 stop5h 37m

Houston George Bush Intcntl

Wed 7/22

5:20 pm-11:53 pm

1 stop6h 33m

$216

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 7/4

1:55 pm-11:56 pm

2 stops10h 01m

Houston George Bush Intcntl

Tue 7/7

2:38 pm-8:33 pm

1 stop5h 55m

$221

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 8/15

2:27 pm-11:52 pm

2 stops9h 25m

Houston George Bush Intcntl

Tue 8/18

11:23 am-4:24 pm

1 stop5h 01m

$229

ChicagoHouston

MDW - HOU

MDWHOU

Chicago Midway

Tue 7/7

7:10 am-9:45 am

Nonstop2h 35m

Houston Hobby

Thu 7/9

8:35 pm-11:00 pm

Nonstop2h 25m

$234

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/21

Showing 1-10 of 60 resultsSorted by cheapest first
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, February is the cheapest month in which you can book a flight from Illinois to Houston (average of $171). Flying from Illinois to Houston in March is currently the most expensive (average of $344). 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 May 22, 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 17% versus a flight at noon.

How much does it cost to fly round-trip from Illinois to Houston?

How far ahead should I book a flight from Illinois to Houston?

To ensure you get the cheapest price possible for a flight from Illinois to Houston, you should look to book at least 87 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 May 16, 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 5h 08m. Delta provides one of the quickest options available for as low as $209. Illinois and Houston are separated by a distance of 918 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 $29. 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, February is the cheapest month in which you can book a flight from Illinois to Houston (average of $171). Flying from Illinois to Houston in March is currently the most expensive (average of $344). 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
O'Hare Intl to Dallas/Fort Worth flights
Los Angeles to Dallas/Fort Worth flights
Dulles Intl to Dallas/Fort Worth flights
Seattle to Dallas/Fort Worth flights
Baltimore to Dallas/Fort Worth flights
Atlanta to Dallas/Fort Worth flights
LaGuardia to Hobby flights
Baltimore to Hobby flights
Los Angeles to Hobby flights
O'Hare Intl to Hobby flights
San Francisco to Dallas/Fort Worth flights
Newark to Hobby flights
Ontario to Dallas/Fort Worth flights
Dulles Intl to Hobby flights
Detroit to Dallas/Fort Worth flights
Boston to Dallas/Fort Worth flights
Reagan-National to Hobby flights
Reagan-National to Dallas/Fort Worth flights
Los Angeles to George Bush Intcntl flights
LaGuardia to George Bush Intcntl flights
John F Kennedy Intl to Hobby flights
Philadelphia to Dallas/Fort Worth flights
Atlanta to Hobby flights
Newark to George Bush Intcntl flights
John F Kennedy Intl to George Bush Intcntl flights
Baltimore to George Bush Intcntl flights
Orlando to Hobby flights
Newark to Austin flights
O'Hare Intl to George Bush Intcntl flights
Dulles Intl to George Bush Intcntl flights
Seattle to Hobby flights
Denver to Dallas/Fort Worth flights
Sky Harbor Intl to Dallas/Fort Worth flights
Ontario to Hobby flights
Orlando to Dallas/Fort Worth flights
Minneapolis to Dallas/Fort Worth flights
Reagan-National to George Bush Intcntl flights
Fort Lauderdale to Dallas/Fort Worth flights
Miami to Dallas/Fort Worth flights
Atlanta to George Bush Intcntl flights
John F Kennedy Intl to Austin flights
Ontario to George Bush Intcntl flights
Detroit to Hobby flights
Boston to Hobby flights
Detroit to George Bush Intcntl flights
Miami to Hobby flights
Los Angeles 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 May 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$57Average$181FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$69Average$152FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$138Average$334FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$162Average$376FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$302FlexibilityNo cancel feeOn-time63%
DeltaCheapest$202Average$272FlexibilityNo 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.
Site
©2026 Cheapflights