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$49+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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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 septiembre 16, 2025.

Round-trip from

$92
(Cheapflightsfares)

One-way from

$49
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$190
From Houston to Illinois
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One-way flight from Houston to Illinois
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Highest demand for flights based on searches. 10% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septiembre 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
vie. 9/266:09 pmIAH - MDW
Nonstop2h 37mFrontier
dom. 9/286:30 amMDW - IAH
Nonstop2h 48mFrontier
Deal found 9/14$92
This Frontier deal was found by Cheapflights users on 9/14. 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.
jue. 9/2510:08 amIAH - MDW
Nonstop2h 38mFrontier
jue. 10/26:30 amMDW - IAH
Nonstop2h 48mFrontier
Deal found 9/14$93
This Frontier deal was found by Cheapflights users on 9/14. 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.
dom. 9/2110:08 amIAH - MDW
Nonstop2h 38mFrontier
jue. 9/256:30 amMDW - IAH
Nonstop2h 48mFrontier
Deal found 9/14$94
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
lun. 10/2710:12 pmIAH - ORD
Nonstop2h 32mFrontier
vie. 10/311:36 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 9/14$95
This Frontier deal was found by Cheapflights users on 9/14. 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.
vie. 10/1010:12 pmIAH - ORD
Nonstop2h 32mFrontier
sáb. 10/111:14 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 9/14$96
This Trip.com deal was found by Cheapflights users on 9/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/36:09 pmIAH - MDW
Nonstop2h 37mFrontier
lun. 10/62:26 pmMDW - IAH
Nonstop2h 48mFrontier
Deal found 9/13$98
This Priceline deal was found by Cheapflights users on 9/15. 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.
vie. 10/38:00 pmIAH - ORD
Nonstop2h 45mFrontier
lun. 10/64:03 pmORD - IAH
Nonstop3h 07mFrontier
Deal found 9/15$100
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
jue. 11/134:29 pmIAH - ORD
Nonstop2h 47mSpirit Airlines
sáb. 11/157:35 amORD - IAH
Nonstop2h 45mSpirit Airlines
Deal found 9/14$103
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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.
mar. 9/3010:23 amIAH - ORD
Nonstop2h 46mSpirit Airlines
vie. 10/38:56 pmORD - IAH
Nonstop2h 49mSpirit Airlines
Deal found 9/16$105
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
jue. 11/69:04 pmIAH - ORD
Nonstop2h 37mFrontier
dom. 11/91:36 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 9/14$107
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
vie. 11/79:04 pmIAH - ORD
Nonstop2h 37mFrontier
dom. 11/91:36 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 9/14$108
This Priceline deal was found by Cheapflights users on 9/14. 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.
sáb. 10/1812:35 pmIAH - MDW
1 stop10h 12mFrontier
lun. 10/209:00 amMDW - IAH
Nonstop2h 49mFrontier
Deal found 9/14$108

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 septiembre 16, 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

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

vie. 10/17

5:00 pm-6:57 pm

Nonstop1h 57m

Lambert-St Louis

lun. 10/20

6:15 am-8:26 am

Nonstop2h 11m

$115

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

mar. 10/14

8:05 pm-10:00 pm

Nonstop1h 55m

Lambert-St Louis

mar. 10/21

2:25 pm-6:20 pm

1 stop3h 55m

$125

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

jue. 11/6

7:45 am-9:45 am

Nonstop2h 00m

Lambert-St Louis

sáb. 11/8

5:50 pm-8:00 pm

Nonstop2h 10m

$131

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

sáb. 11/1

3:10 pm-5:10 pm

Nonstop2h 00m

Lambert-St Louis

dom. 11/2

5:05 am-7:20 am

Nonstop2h 15m

$131

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

lun. 10/13

9:46 am-3:49 pm

1 stop6h 03m

Chicago O'Hare Intl

lun. 10/20

6:00 am-8:51 am

Nonstop2h 51m

$140

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

sáb. 10/25

12:50 pm-2:50 pm

Nonstop2h 00m

Lambert-St Louis

vie. 10/31

1:35 pm-6:30 pm

1 stop4h 55m

$141

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

vie. 10/31

3:10 pm-5:10 pm

Nonstop2h 00m

Lambert-St Louis

lun. 11/3

9:40 am-11:50 am

Nonstop2h 10m

$147

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

vie. 10/31

3:10 pm-5:10 pm

Nonstop2h 00m

Lambert-St Louis

dom. 11/2

5:05 am-7:20 am

Nonstop2h 15m

$147

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

mar. 11/4

8:15 am-10:56 am

Nonstop2h 41m

Chicago O'Hare Intl

mar. 11/4

5:10 pm-8:10 pm

Nonstop3h 00m

$157

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

mar. 12/16

8:30 am-11:11 am

Nonstop2h 41m

Chicago O'Hare Intl

mar. 12/30

9:23 pm-12:30 am

Nonstop3h 07m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, 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 septiembre 16, 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 septiembre 16, 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
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

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
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

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
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

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.
Spirit Airlines
6.3
Okay
8,019 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

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.
Frontier
5.8
Fair
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

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.

  • How long is the flight from Houston to Illinois?

    There are many flights that can get you from Houston to Illinois in 1h 55m. Fly via United Airlines, Southwest, or Frontier to get the fastest option. The distance between Houston and Illinois is about 688 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 $58. United Airlines flights start at $58 while deals on Frontier start at $77 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

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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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$71Average$169FlexibilityNo cancel feeOn-time65%
FrontierCheapest$75Average$179FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$160Average$435FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$177Average$372FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$177Average$284FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$331FlexibilityNo cancel feeOn-timeN/A

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