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$57+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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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 October 23, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/23. 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 11/512:13 pmIAH - ORD
Nonstop2h 38mSpirit Airlines
Fri 12/58:52 pmORD - IAH
Nonstop2h 56mSpirit Airlines
Deal found 10/23$94
This Priceline deal was found by Cheapflights users on 10/23. 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.
Mon 11/247:45 pmIAH - MDW
Nonstop2h 32mFrontier
Thu 11/274:00 pmMDW - IAH
Nonstop3h 00mFrontier
Deal found 10/23$95
This Priceline deal was found by Cheapflights users on 10/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:04 pmIAH - ORD
Nonstop2h 37mMultiple Airlines
Wed 11/128:28 amORD - IAH
Nonstop2h 50mMultiple Airlines
Deal found 10/21$96
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Thu 11/2710:12 amIAH - ORD
Nonstop2h 51mFrontier
Sat 12/61:29 pmORD - IAH
1 stop9h 21mFrontier
Deal found 10/21$97
This Priceline deal was found by Cheapflights users on 10/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/710:04 amIAH - MDW
Nonstop2h 33mFrontier
Sat 11/86:30 amMDW - IAH
Nonstop2h 49mFrontier
Deal found 10/20$97
This Priceline deal was found by Cheapflights users on 10/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:04 pmIAH - ORD
Nonstop2h 37mFrontier
Tue 11/111:36 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 10/20$98
This Priceline deal was found by Cheapflights users on 10/22. 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.
Sat 11/2210:12 amIAH - ORD
Nonstop2h 51mFrontier
Mon 12/16:30 amORD - IAH
Nonstop2h 57mFrontier
Deal found 10/22$99
This CheapOair deal was found by Cheapflights users on 10/22. 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 11/207:45 pmIAH - MDW
Nonstop2h 32mFrontier
Sat 11/223:55 pmMDW - IAH
Nonstop2h 58mFrontier
Deal found 10/22$99
This Priceline deal was found by Cheapflights users on 10/22. 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 11/2710:12 amIAH - ORD
Nonstop2h 51mMultiple Airlines
Tue 12/26:48 amORD - IAH
1 stop7h 52mMultiple Airlines
Deal found 10/22$100
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Thu 11/277:45 pmIAH - MDW
Nonstop2h 32mFrontier
Fri 12/512:18 pmMDW - IAH
1 stop22h 19mFrontier
Deal found 10/21$100
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 12/135:13 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Tue 12/168:52 pmORD - IAH
Nonstop2h 56mSpirit Airlines
Deal found 10/22$101
This Frontier deal was found by Cheapflights users on 10/21. 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.
Thu 11/2710:12 amIAH - ORD
Nonstop2h 51mFrontier
Thu 12/45:15 amORD - IAH
1 stop11h 59mFrontier
Deal found 10/21$102

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 October 23, 2025.

Round-trip from

$94
(Cheapflightsfares)

One-way from

$57
(Southwest)

Popular in

June

Cheapest in

February

Average price

$192
From Houston to Illinois
Search Deals
One-way flight from Houston to Illinois
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. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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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 October 23, 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

Fri 12/12

5:00 am-7:41 am

Nonstop2h 41m

Chicago O'Hare Intl

Mon 12/15

9:08 pm-11:59 pm

Nonstop2h 51m

$107

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Thu 12/25

11:05 am-5:10 pm

2 stops6h 05m

Chicago Midway

Tue 1/6

7:55 pm-10:40 pm

Nonstop2h 45m

$133

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 11/26

7:00 am-1:23 pm

1 stop6h 23m

Chicago O'Hare Intl

Wed 12/3

3:43 pm-12:41 am

1 stop8h 58m

$151

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 11/21

10:22 am-1:13 pm

Nonstop2h 51m

Chicago O'Hare Intl

Sun 11/30

8:20 am-11:10 am

Nonstop2h 50m

$161

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Fri 12/12

3:35 pm-7:45 pm

1 stop4h 10m

Chicago Midway

Tue 12/16

10:15 am-1:10 pm

Nonstop2h 55m

$161

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Wed 12/3

7:45 pm-10:10 pm

Nonstop2h 25m

Chicago Midway

Mon 12/8

1:20 pm-5:45 pm

1 stop4h 25m

$168

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 11/6

8:06 pm-1:57 pm

1 stop17h 51m

Lambert-St Louis

Sat 11/8

7:45 pm-10:37 am

1 stop14h 52m

$172

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Sat 12/6

6:00 am-12:40 pm

1 stop6h 40m

Lambert-St Louis

Sat 12/13

5:12 pm-10:33 pm

1 stop5h 21m

$177

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Thu 12/4

6:35 am-9:00 am

Nonstop2h 25m

Chicago Midway

Sun 12/7

5:10 am-7:55 am

Nonstop2h 45m

$178

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Sat 12/6

11:00 am-4:45 pm

1 stop5h 45m

Chicago Midway

Mon 12/8

5:00 am-10:15 am

1 stop5h 15m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

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 $52). 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 October 23, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 55% 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 December 16, 2024.

Travelers seeking maximum savings on their Houston to Illinois flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday at noon 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 October 23, 2025.
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
4,236 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

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
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

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
8,995 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

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
11,033 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

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
8,104 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

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
5.8
Fair
3,128 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

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 41m. Fly via United Airlines, Southwest, or Spirit Airlines to get the fastest option. The distance between Houston and Illinois is about 926 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 Southwest, which is currently one of the cheapest options available, starting at $57. Frontier flights start at $59 while deals on Spirit Airlines start at $64 one-way.

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

    While some choose either Houston Hobby - Chicago Midway or Houston Hobby - Chicago O'Hare Intl, 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, March is the cheapest month in which you can book a flight from Houston to Illinois (average of $52). 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$77Average$172FlexibilityNo cancel feeOn-time65%
FrontierCheapest$77Average$185FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$165Average$418FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$171Average$281FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$177Average$372FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$346FlexibilityNo cancel feeOn-timeN/A

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