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$59+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$129
(Kiwi.com)

One-way from

$59
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$217
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. 5% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
sáb. 8/239:23 amIAH - ORD
Nonstop2h 45mSpirit Airlines
vie. 9/194:30 pmORD - IAH
Nonstop2h 43mSpirit Airlines
Deal found 6/9$129
This Frontier deal was found by Cheapflights users on 6/11. 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. 9/49:34 amIAH - MDW
Nonstop2h 32mFrontier
lun. 9/86:00 amMDW - IAH
Nonstop2h 49mFrontier
Deal found 6/11$129
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
vie. 8/110:05 amIAH - ORD
Nonstop2h 44mMultiple Airlines
mar. 8/59:10 pmORD - IAH
Nonstop2h 49mMultiple Airlines
Deal found 6/12$136
This Frontier deal was found by Cheapflights users on 6/11. 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.
lun. 9/18:25 pmIAH - ORD
Nonstop2h 51mFrontier
jue. 9/46:50 amORD - IAH
Nonstop2h 51mFrontier
Deal found 6/11$144
This Southwest deal was found by Cheapflights users on 6/10. 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.
jue. 9/45:55 amHOU - MDW
Nonstop2h 25mSouthwest
lun. 9/85:45 amMDW - HOU
Nonstop2h 30mSouthwest
Deal found 6/10$157
This Southwest deal was found by Cheapflights users on 6/11. 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.
mié. 11/127:00 pmHOU - STL
Nonstop2h 00mSouthwest
mié. 11/199:40 amSTL - HOU
Nonstop2h 10mSouthwest
Deal found 6/11$157
This FlightHub deal was found by Cheapflights users on 6/11. 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.
mié. 9/38:46 pmIAH - STL
1 stop11h 03mSpirit Airlines
vie. 9/58:44 amSTL - IAH
1 stop9h 06mSpirit Airlines
Deal found 6/11$169
This Southwest deal was found by Cheapflights users on 6/10. 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.
jue. 9/45:40 amHOU - ORD
1 stop7h 05mSouthwest
lun. 9/81:50 pmORD - HOU
1 stop7h 00mSouthwest
Deal found 6/10$177
This American Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 8/206:30 pmHOU - STL
1 stop4h 44mAmerican Airlines
lun. 8/255:15 amSTL - HOU
1 stop4h 29mAmerican Airlines
Deal found 6/10$177
This American Airlines deal was found by Cheapflights users on 6/12. 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.
mar. 8/128:41 amIAH - STL
1 stop5h 10mAmerican Airlines
mar. 8/197:23 amSTL - IAH
1 stop5h 17mAmerican Airlines
Deal found 6/12$177
This United Airlines deal was found by Cheapflights users on 6/12. 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.
sáb. 8/2312:15 pmIAH - STL
Nonstop2h 11mUnited Airlines
lun. 9/18:20 amSTL - IAH
Nonstop2h 11mUnited Airlines
Deal found 6/12$178
This American Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 7/306:23 pmIAH - MLI
1 stop4h 53mAmerican Airlines
mié. 8/610:42 amMLI - IAH
1 stop5h 57mAmerican Airlines
Deal found 6/10$203

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 junio 12, 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

sáb. 8/23

9:23 am-12:08 pm

Nonstop2h 45m

Chicago O'Hare Intl

vie. 9/19

4:30 pm-7:13 pm

Nonstop2h 43m

$129

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

jue. 9/4

9:34 am-12:06 pm

Nonstop2h 32m

Chicago Midway

lun. 9/8

6:00 am-8:49 am

Nonstop2h 49m

$129

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

vie. 8/1

10:05 am-12:49 pm

Nonstop2h 44m

Chicago O'Hare Intl

mar. 8/5

9:10 pm-11:59 pm

Nonstop2h 49m

$136

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

lun. 9/1

8:25 pm-11:16 pm

Nonstop2h 51m

Chicago O'Hare Intl

jue. 9/4

6:50 am-9:41 am

Nonstop2h 51m

$144

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

jue. 9/4

5:55 am-8:20 am

Nonstop2h 25m

Chicago Midway

lun. 9/8

5:45 am-8:15 am

Nonstop2h 30m

$157

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

mié. 11/12

7:00 pm-9:00 pm

Nonstop2h 00m

Lambert-St Louis

mié. 11/19

9:40 am-11:50 am

Nonstop2h 10m

$157

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mié. 9/3

8:46 pm-7:49 am

1 stop11h 03m

Lambert-St Louis

vie. 9/5

8:44 am-5:50 pm

1 stop9h 06m

$169

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

mié. 8/20

6:30 pm-11:14 pm

1 stop4h 44m

Lambert-St Louis

lun. 8/25

5:15 am-9:44 am

1 stop4h 29m

$177

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mar. 8/12

8:41 am-1:51 pm

1 stop5h 10m

Lambert-St Louis

mar. 8/19

7:23 am-12:40 pm

1 stop5h 17m

$177

HoustonChicago

HOU - ORD

HOUORD

Houston Hobby

jue. 9/4

5:40 am-12:45 pm

1 stop7h 05m

Chicago O'Hare Intl

lun. 9/8

1:50 pm-8:50 pm

1 stop7h 00m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 junio 12, 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 junio 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Allegiant Air
7.3
Good
725 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $59. Frontier flights start at $71 while deals on Southwest start at $79 one-way.

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

    While some choose either Houston Hobby - Chicago Midway or Houston George Bush Intcntl - Chicago O'Hare Intl, 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$152FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$64Average$162FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$141Average$394FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$147Average$410FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$192Average$304FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$346FlexibilityNo cancel feeOn-timeN/A

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