HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$53+ Cheap flights from Houston to Illinois

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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Houston to Illinois 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 Houston to Illinois

Keep the following information in mind while searching for Houston to Illinois flight deals. Data was last updated July 3, 2025.

Round-trip from

$122
(Priceline)

One-way from

$53
(Priceline)

Popular in

June

Cheapest in

February

Average price

$188
From Houston to Illinois
Search Deals
One-way flight from Houston to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Houston to Illinois

Cheapest flights from Houston to Illinois
Explore the most affordable flight options available from Houston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/235:15 amIAH - ORD
Nonstop2h 35mSpirit Airlines
Sat 7/269:10 pmORD - IAH
Nonstop2h 49mSpirit Airlines
Deal found 7/1$123
This Frontier deal was found by Cheapflights users on 7/3. 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 7/257:42 pmIAH - MDW
Nonstop2h 38mFrontier
Mon 7/284:01 pmMDW - IAH
Nonstop2h 57mFrontier
Deal found 7/3$123
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/238:00 amIAH - ORD
1 stop8h 04mMultiple Airlines
Wed 8/64:37 pmORD - IAH
Nonstop2h 48mMultiple Airlines
Deal found 7/2$124
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/14:41 pmIAH - ORD
1 stop7h 41mFrontier
Sun 8/106:30 amORD - IAH
Nonstop2h 50mFrontier
Deal found 7/1$132
This FlightHub deal was found by Cheapflights users on 7/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:23 amIAH - STL
1 stop7h 12mSpirit Airlines
Sun 10/52:30 pmSTL - IAH
1 stop5h 15mSpirit Airlines
Deal found 7/1$139
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:35 amHOU - MDW
Nonstop2h 25mSouthwest
Wed 10/81:00 pmMDW - HOU
Nonstop2h 35mSouthwest
Deal found 7/3$157
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/58:56 pmIAH - STL
1 stop26h 51mMultiple Airlines
Thu 8/710:47 amSTL - IAH
1 stop8h 38mMultiple Airlines
Deal found 7/2$159
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/285:05 amHOU - ORD
1 stop6h 45mSouthwest
Tue 9/21:50 pmORD - HOU
1 stop6h 15mSouthwest
Deal found 7/3$177
This Priceline deal was found by Cheapflights users on 7/2. 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.
Thu 7/316:00 amIAH - STL
1 stop7h 34mFrontier
Thu 8/72:36 pmSTL - IAH
1 stop8h 20mFrontier
Deal found 7/2$190
This Southwest deal was found by Cheapflights users on 7/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/78:00 amHOU - STL
Nonstop2h 00mSouthwest
Mon 8/116:55 pmSTL - HOU
Nonstop2h 00mSouthwest
Deal found 7/1$197
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/77:20 amIAH - STL
Nonstop2h 08mUnited Airlines
Mon 8/116:15 pmSTL - IAH
Nonstop2h 25mUnited Airlines
Deal found 7/3$197
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/96:00 amHOU - MDW
1 stop5h 48mDelta
Tue 8/126:04 amMDW - HOU
1 stop6h 23mDelta
Deal found 7/2$217

Cheapflights Fare Finder

Customize your flight search to find flights from Houston to Illinois 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 July 3, 2025.
Use the filters below to find and compare flights from Houston to Illinois that are best for you.

Fly from

Houston

Fly to

Illinois

Route

Depart

Return

Price

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 9/18

11:34 am-7:40 pm

1 stop8h 06m

Chicago O'Hare Intl

Sun 9/21

11:32 am-8:15 pm

1 stop8h 43m

$122

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 7/23

5:15 am-7:50 am

Nonstop2h 35m

Chicago O'Hare Intl

Sat 7/26

9:10 pm-11:59 pm

Nonstop2h 49m

$123

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Fri 7/25

7:42 pm-10:20 pm

Nonstop2h 38m

Chicago Midway

Mon 7/28

4:01 pm-6:58 pm

Nonstop2h 57m

$123

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 8/22

8:28 pm-11:19 pm

Nonstop2h 51m

Chicago O'Hare Intl

Sat 9/13

8:56 pm-11:45 pm

Nonstop2h 49m

$125

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 10/2

6:23 am-1:35 pm

1 stop7h 12m

Lambert-St Louis

Sun 10/5

2:30 pm-7:45 pm

1 stop5h 15m

$139

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Wed 10/1

6:35 am-9:00 am

Nonstop2h 25m

Chicago Midway

Wed 10/8

1:00 pm-3:35 pm

Nonstop2h 35m

$157

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 8/5

8:56 pm-11:47 pm

1 stop26h 51m

Lambert-St Louis

Thu 8/7

10:47 am-7:25 pm

1 stop8h 38m

$159

HoustonChicago

HOU - ORD

HOUORD

Houston Hobby

Thu 8/28

6:10 am-2:25 pm

1 stop8h 15m

Chicago O'Hare Intl

Tue 9/2

1:50 pm-10:35 pm

1 stop8h 45m

$177

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 7/31

6:00 am-1:34 pm

1 stop7h 34m

Lambert-St Louis

Thu 8/7

2:36 pm-10:56 pm

1 stop8h 20m

$190

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 8/7

7:20 am-9:28 am

Nonstop2h 08m

Lambert-St Louis

Mon 8/11

6:15 pm-8:40 pm

Nonstop2h 25m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 56 results
1
2
3
...
6

Best time to book a flight from Houston to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Houston 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 Houston to Illinois

What is the cheapest month to book a flight from Houston to Illinois?

Currently, August is the cheapest month in which you can book a flight from Houston to Illinois (average of $245). Flying from Houston to Illinois in March is currently the most expensive (average of $321). 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 HOU to IL?

Find hourly flight availability from Houston to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Houston to Illinois as you normally would.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated July 3, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Houston to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,970 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,845 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Allegiant Air
7.2
Good
709 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from Houston to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Houston to Illinois one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $53. Spirit Airlines flights start at $54 while deals on Southwest start at $79 one-way.

  • What are the most popular routes from Houston to Illinois?

    While some choose either Houston George Bush Intcntl - Chicago O'Hare Intl or Houston Hobby - Chicago Midway, Houston Hobby - Chicago O'Hare Intl is the most popular route from Houston to Illinois.

  • Can I find deals for flights from Houston to Illinois that include hotel bookings?

    Yes. In addition to deals on Houston to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Houston to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to Illinois.

  • Can I find deals for business class flights from Houston to Illinois?

    Yes. Cheapflights offers flight deals from Houston to Illinois 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 Houston to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Houston to Illinois (average of $245). Flying from Houston to Illinois in March is currently the most expensive (average of $321). 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 Houston to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to Seattle flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to O'Hare Intl flights
Dallas/Fort Worth to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
Dallas/Fort Worth to Newark flights
Dallas/Fort Worth to Orlando flights
Dallas/Fort Worth to Denver flights
Hobby to Las Vegas flights
Hobby to LaGuardia flights
Dallas/Fort Worth to Midway flights
Dallas/Fort Worth to Detroit flights
Hobby to Seattle flights
George Bush Intcntl to Las Vegas flights
Hobby to Newark flights
Hobby to John F Kennedy Intl flights
Dallas/Fort Worth to San Francisco flights
Dallas/Fort Worth to Miami flights
Dallas/Fort Worth to Baltimore flights
Hobby to O'Hare Intl flights
Dallas/Fort Worth to Ontario flights
Dallas/Fort Worth to Boston flights
Hobby to Denver flights
George Bush Intcntl to Newark flights
Love Field to Seattle flights
Hobby to Los Angeles flights
Dallas/Fort Worth to San Diego flights
George Bush Intcntl to LaGuardia flights
Hobby to Orlando flights
Dallas/Fort Worth to Dulles Intl flights
Austin to Las Vegas flights
Dallas/Fort Worth to Fort Lauderdale flights
George Bush Intcntl to Seattle flights
Austin to O'Hare Intl flights
Hobby to Baltimore flights
Dallas/Fort Worth to Burbank flights
Dallas/Fort Worth to Minneapolis flights
George Bush Intcntl to Denver flights
Austin to Newark flights
George Bush Intcntl to Los Angeles flights
George Bush Intcntl to John F Kennedy Intl flights
Austin to John F Kennedy Intl flights
Love Field to Las Vegas flights
Austin to Denver flights
Dallas/Fort Worth to Philadelphia flights
Hobby to Boston flights
Hobby to Miami flights
Dallas/Fort Worth to Atlanta flights
Love Field to LaGuardia flights

Top 6 airlines flying from Houston to Illinois

Discover the top 6 airlines that operate flights from Houston to Illinois. 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$154FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$62Average$164FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$154Average$406FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$157Average$424FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$294FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$346FlexibilityNo 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.