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$52+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap 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 21, 2026.

This Expedia deal was found by Cheapflights users on 1/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2711:17 am
IAH
-
ORD
Nonstop2h 48m
Multiple Airlines
Wed 3/49:18 am
ORD
-
IAH
Nonstop3h 06m
Multiple Airlines
Deal found 1/21$80
This Expedia deal was found by Cheapflights users on 1/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/195:15 am
IAH
-
ORD
Nonstop2h 39m
Multiple Airlines
Sun 2/227:30 am
ORD
-
IAH
Nonstop3h 22m
Multiple Airlines
Deal found 1/20$82
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Sun 2/155:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Tue 2/249:18 am
ORD
-
IAH
Nonstop3h 06m
Spirit Airlines
Deal found 1/20$83
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Thu 2/195:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Tue 2/249:18 am
ORD
-
IAH
Nonstop3h 06m
Spirit Airlines
Deal found 1/20$84
This Expedia deal was found by Cheapflights users on 1/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/165:15 am
IAH
-
ORD
Nonstop2h 39m
Multiple Airlines
Thu 2/197:00 am
ORD
-
IAH
Nonstop3h 22m
Multiple Airlines
Deal found 1/20$85
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/2010:26 am
IAH
-
ORD
Nonstop2h 54m
Multiple Airlines
Wed 2/259:18 am
ORD
-
IAH
Nonstop3h 06m
Multiple Airlines
Deal found 1/20$86
This Super.com deal was found by Cheapflights users on 1/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2010:26 am
IAH
-
ORD
Nonstop2h 54m
Frontier
Sun 3/17:00 am
ORD
-
IAH
Nonstop3h 22m
Frontier
Deal found 1/21$87
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Sun 2/155:15 am
IAH
-
ORD
Nonstop2h 39m
Multiple Airlines
Sun 2/227:30 am
ORD
-
IAH
Nonstop3h 22m
Multiple Airlines
Deal found 1/20$88
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1412:24 pm
IAH
-
ORD
Nonstop2h 53m
Frontier
Mon 2/165:40 am
ORD
-
IAH
Nonstop3h 16m
Frontier
Deal found 1/21$89
This Super.com deal was found by Cheapflights users on 1/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:51 pm
IAH
-
MDW
Nonstop2h 38m
Frontier
Mon 2/236:45 am
MDW
-
IAH
Nonstop3h 00m
Frontier
Deal found 1/21$89
This Super.com deal was found by Cheapflights users on 1/20. 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.
Thu 2/195:15 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Sun 2/228:59 am
ORD
-
IAH
Nonstop3h 01m
Spirit Airlines
Deal found 1/20$91
This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/711:38 am
IAH
-
ORD
Nonstop2h 39m
Spirit Airlines
Tue 2/103:22 pm
ORD
-
IAH
Nonstop3h 00m
Spirit Airlines
Deal found 1/21$92

Find flight deals from Houston to Illinois

Keep the following information in mind while searching for Houston to Illinois flight deals. Data was last updated January 21, 2026.

Round-trip from

$82
(Kiwi.com)

One-way from

$52
(Super.com)

Popular in

June

Cheapest in

February

Average price

$177
From Houston to Illinois
Search Deals
One-way flight from Houston to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 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 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 21, 2026.
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 2/19

4:22 pm-11:47 pm

1 stop7h 25m

Chicago O'Hare Intl

Thu 2/26

7:00 am-10:22 am

Nonstop3h 22m

$93

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 2/6

8:18 pm-11:11 am

1 stop14h 53m

Lambert-St Louis

Mon 2/9

8:22 pm-3:19 pm

1 stop18h 57m

$132

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 2/12

5:15 am-7:54 am

Nonstop2h 39m

Chicago O'Hare Intl

Sun 2/15

8:59 am-12:00 pm

Nonstop3h 01m

$137

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 2/6

11:38 am-2:17 pm

Nonstop2h 39m

Chicago O'Hare Intl

Sun 2/8

3:22 pm-6:22 pm

Nonstop3h 00m

$141

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 2/21

11:02 am-11:59 pm

1 stop12h 57m

Lambert-St Louis

Wed 2/25

4:51 pm-11:32 pm

1 stop6h 41m

$144

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Sat 2/28

5:55 am-8:20 am

Nonstop2h 25m

Chicago Midway

Sat 2/28

8:55 pm-11:45 pm

Nonstop2h 50m

$157

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 2/18

4:22 pm-11:47 pm

1 stop7h 25m

Chicago O'Hare Intl

Sun 2/22

12:44 pm-10:41 pm

1 stop9h 57m

$157

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 2/6

8:18 pm-10:42 pm

2 stops26h 24m

Chicago O'Hare Intl

Mon 2/9

3:22 pm-6:22 pm

Nonstop3h 00m

$159

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Thu 2/26

6:15 am-4:16 pm

1 stop10h 01m

Chicago Midway

Sat 2/28

6:25 am-5:12 pm

1 stop10h 47m

$160

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 2/20

2:01 pm-6:51 am

2 stops16h 50m

Lambert-St Louis

Fri 2/27

8:22 pm-5:12 pm

1 stop20h 50m

$160

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from Houston to Illinois (average of $59). Flying from Houston to Illinois in May is currently the most expensive (average of $95). 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 21, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 51% on flights from Houston to Illinois by exploring options for tickets in the evening.

What is the cheapest day to fly from Houston to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Houston to Illinois. Price data was last updated on August 31, 2025.

Travelers seeking maximum savings on their Houston to Illinois flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 21, 2026.
Read reviews from past customers who have flown Southwest, United Airlines, and American 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
4,266 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

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
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

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
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

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
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

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.
Spirit Airlines
6.3
Okay
8,364 reviews
Southwest
8.0
Very good
4,266 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

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.
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,266 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

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.

  • How long is the flight from Houston to Illinois?

    There are many flights that can get you from Houston to Illinois in 2h 25m. Fly via Spirit Airlines, Frontier, or Southwest to get the fastest option. The distance between Houston and Illinois is about 938 mi. This flight may include one or multiple stops.

  • 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 $28. Spirit Airlines flights start at $38 while deals on United Airlines start at $69 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, March is the cheapest month in which you can book a flight from Houston to Illinois (average of $59). Flying from Houston to Illinois in May is currently the most expensive (average of $95). 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

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Alternative routes for Houston to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$186FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$69Average$159FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$117Average$359FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$157Average$401FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$162Average$275FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$306FlexibilityNo cancel feeOn-timeN/A

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