HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$54+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
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

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Round-trip from

$101
(CheapOair)

One-way from

$54
(FlightHub)

Popular in

March

Cheapest in

September

Average price

$189
From Houston to Illinois
Search Deals
One-way flight from Houston to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 30, 2025.

This CheapOair deal was found by Cheapflights users on 1/30. 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.
Sat 2/1511:24 amIAH - ORD
Nonstop2h 45mMultiple Airlines
Wed 2/194:44 pmORD - IAH
Nonstop2h 48mMultiple Airlines
Deal found 1/30$101
This Mytrip deal was found by Cheapflights users on 1/29. 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.
Sat 3/18:37 pmIAH - ORD
Nonstop2h 41mSpirit Airlines
Tue 3/45:44 pmORD - IAH
2 stops22h 41mSpirit Airlines
Deal found 1/29$102
This Cheapflightsfares deal was found by Cheapflights users on 1/30. 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 4/3012:44 pmIAH - MDW
Nonstop2h 29mFrontier
Sun 5/42:20 pmMDW - IAH
1 stop7h 41mFrontier
Deal found 1/30$102
This Frontier deal was found by Cheapflights users on 1/29. 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 2/209:09 amIAH - ORD
Nonstop2h 45mFrontier
Mon 2/249:29 amORD - IAH
1 stop6h 37mFrontier
Deal found 1/29$104
This Frontier deal was found by Cheapflights users on 1/30. 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 2/125:05 pmIAH - STL
1 stop6h 38mFrontier
Sat 2/158:52 pmSTL - IAH
1 stop14h 15mFrontier
Deal found 1/30$125
This FlightHub deal was found by Cheapflights users on 1/30. 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.
Fri 2/2110:36 amHOU - MDW
1 stop13h 41mFrontier
Sun 2/236:40 amMDW - HOU
1 stop26h 56mFrontier
Deal found 1/30$144
This FlightHub deal was found by Cheapflights users on 1/30. 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.
Fri 2/2110:36 amHOU - ORD
1 stop14h 08mFrontier
Sun 2/236:50 amORD - HOU
1 stop26h 46mFrontier
Deal found 1/30$144
This Southwest deal was found by Cheapflights users on 1/30. 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 4/235:20 amHOU - MDW
Nonstop2h 25mSouthwest
Mon 4/287:55 amMDW - HOU
Nonstop2h 40mSouthwest
Deal found 1/30$159
This FlightHub deal was found by Cheapflights users on 1/29. 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 3/65:45 amIAH - STL
1 stop10h 57mSpirit Airlines
Tue 3/115:38 pmSTL - IAH
1 stop14h 22mSpirit Airlines
Deal found 1/29$176
This Southwest deal was found by Cheapflights users on 1/29. 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.
Mon 2/246:00 amHOU - STL
1 stop4h 30mSouthwest
Wed 2/268:25 pmSTL - HOU
Nonstop2h 10mSouthwest
Deal found 1/29$187
This American Airlines deal was found by Cheapflights users on 1/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/226:30 amIAH - ORD
Nonstop2h 34mAmerican Airlines
Mon 2/248:30 pmORD - IAH
Nonstop3h 00mAmerican Airlines
Deal found 1/29$188
This Southwest deal was found by Cheapflights users on 1/30. 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.
Tue 3/45:00 pmHOU - ORD
1 stop4h 30mSouthwest
Wed 3/51:45 pmORD - HOU
1 stop7h 25mSouthwest
Deal found 1/30$197

Find flights from Houston to Illinois within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 2/15

11:24 am-2:09 pm

Nonstop2h 45m

Chicago O'Hare Intl

Wed 2/19

4:44 pm-7:32 pm

Nonstop2h 48m

$101

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 3/1

8:37 pm-11:18 pm

Nonstop2h 41m

Chicago O'Hare Intl

Tue 3/4

5:44 pm-4:25 pm

2 stops22h 41m

$102

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Wed 4/30

12:44 pm-3:13 pm

Nonstop2h 29m

Chicago Midway

Sun 5/4

2:20 pm-10:01 pm

1 stop7h 41m

$102

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 2/20

9:09 am-11:54 am

Nonstop2h 45m

Chicago O'Hare Intl

Mon 2/24

9:29 am-4:06 pm

1 stop6h 37m

$104

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 2/12

5:05 pm-11:43 pm

1 stop6h 38m

Lambert-St Louis

Sat 2/15

8:52 pm-11:07 am

1 stop14h 15m

$125

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Fri 2/21

10:36 am-12:17 am

1 stop13h 41m

Chicago Midway

Sun 2/23

6:40 am-9:36 am

1 stop26h 56m

$144

HoustonChicago

HOU - ORD

HOUORD

Houston Hobby

Fri 2/21

10:36 am-12:44 am

1 stop14h 08m

Chicago O'Hare Intl

Sun 2/23

6:50 am-9:36 am

1 stop26h 46m

$144

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Wed 4/23

5:20 am-7:45 am

Nonstop2h 25m

Chicago Midway

Mon 4/28

7:55 am-10:35 am

Nonstop2h 40m

$159

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 3/6

5:45 am-4:42 pm

1 stop10h 57m

Lambert-St Louis

Tue 3/11

5:38 pm-8:00 am

1 stop14h 22m

$176

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 2/22

6:30 am-9:04 am

Nonstop2h 34m

Chicago O'Hare Intl

Mon 2/24

8:30 pm-11:30 pm

Nonstop3h 00m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 60 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.

Travel insights for flights from Houston to Illinois

Get recent, data-driven insights about flights from Houston to Illinois including ideal travel times, pricing trends, and more.

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 $325). 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 January 30, 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 January 30, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines and Delta from Houston to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Justin,May 2024

AUS - SAN

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Justin,May 2024

AUS - SAN

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Justin,May 2024

AUS - SAN

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Justin,May 2024

AUS - SAN

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Justin,May 2024

AUS - SAN

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Allegiant Air
7.3
Good
790 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Justin,May 2024

AUS - SAN

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

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 Spirit Airlines, which is currently one of the cheapest options available, starting at $54. Frontier flights start at $54 while deals on Southwest start at $71 one-way.

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

    While some choose either Houston Hobby - Chicago O'Hare Intl or Houston Hobby - Chicago Midway, Houston George Bush Intcntl - 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 $325). 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 Las Vegas flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to Orlando flights
Dallas/Fort Worth to Seattle flights
Dallas/Fort Worth to O'Hare Intl flights
Dallas/Fort Worth to Los Angeles flights
Dallas/Fort Worth to Newark flights
Dallas/Fort Worth to Denver flights
Hobby to LaGuardia flights
Dallas/Fort Worth to Fort Lauderdale flights
Dallas/Fort Worth to Miami flights
Hobby to Las Vegas flights
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Baltimore flights
Dallas/Fort Worth to San Francisco flights
Hobby to John F Kennedy Intl flights
Hobby to Seattle flights
Hobby to Denver flights
George Bush Intcntl to Las Vegas flights
Dallas/Fort Worth to Midway flights
Dallas/Fort Worth to Reagan-National flights
Austin to John F Kennedy Intl flights
Hobby to Newark flights
Hobby to Orlando flights
George Bush Intcntl to Newark flights
Dallas/Fort Worth to Atlanta flights
Hobby to Los Angeles flights
George Bush Intcntl to John F Kennedy Intl flights
Austin to Denver flights
George Bush Intcntl to LaGuardia flights
Dallas/Fort Worth to Hobby flights
George Bush Intcntl to Denver flights
Austin to Las Vegas flights
Dallas/Fort Worth to Boston flights
Hobby to Fort Lauderdale flights
Dallas/Fort Worth to Sky Harbor Intl flights
Love Field to Las Vegas flights
George Bush Intcntl to Seattle flights
Hobby to Miami flights
Dallas/Fort Worth to Salt Lake City flights
Hobby to Dallas/Fort Worth flights
Austin to Newark flights
George Bush Intcntl to Orlando flights
Dallas/Fort Worth to Burbank flights
George Bush Intcntl to Los Angeles flights
Austin to Los Angeles flights
Hobby to Sky Harbor Intl flights
George Bush Intcntl to Fort Lauderdale flights
Dallas/Fort Worth to George Bush Intcntl 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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$46Average$142FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$64Average$153FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$140Average$397FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$143Average$411FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$195Average$372FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$441FlexibilityNo 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.