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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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Round-trip from

$106
(Cheapflightsfares)

One-way from

$52
(FlightHub)

Popular in

March

Cheapest in

September

Average price

$187
From Houston to Illinois
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One-way flight from Houston to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/207:54 pmIAH - ORD
Nonstop2h 45mMultiple Airlines
Sun 5/252:58 pmORD - IAH
Nonstop2h 53mMultiple Airlines
Deal found 4/15$98
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/207:54 pmIAH - ORD
Nonstop2h 45mSpirit Airlines
Sat 5/2412:45 pmORD - IAH
Nonstop2h 44mSpirit Airlines
Deal found 4/15$103
This Cheapflightsfares deal was found by Cheapflights users on 4/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/167:40 pmIAH - MDW
Nonstop2h 33mFrontier
Wed 5/2112:21 pmMDW - IAH
Nonstop2h 57mFrontier
Deal found 4/15$106
This Frontier deal was found by Cheapflights users on 4/17. 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.
Sat 5/248:42 pmIAH - ORD
1 stop11h 40mFrontier
Sun 5/252:58 pmORD - IAH
Nonstop2h 53mFrontier
Deal found 4/17$143
This Southwest deal was found by Cheapflights users on 4/17. 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.
Sat 5/179:00 pmHOU - MDW
Nonstop2h 30mSouthwest
Sat 5/245:20 pmMDW - HOU
Nonstop2h 40mSouthwest
Deal found 4/17$178
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/71:29 pmIAH - ORD
Nonstop2h 43mAmerican Airlines
Wed 5/216:00 pmORD - IAH
Nonstop3h 03mAmerican Airlines
Deal found 4/16$188
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/68:40 amIAH - ORD
Nonstop2h 51mUnited Airlines
Wed 5/215:15 amORD - IAH
Nonstop3h 00mUnited Airlines
Deal found 4/16$213
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:06 pmIAH - ORD
1 stop6h 11mDelta
Wed 5/283:33 pmORD - IAH
1 stop7h 24mDelta
Deal found 4/15$217
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:00 amIAH - MDW
1 stop5h 53mDelta
Wed 6/119:21 amMDW - IAH
1 stop8h 31mDelta
Deal found 4/16$217
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:42 pmHOU - ORD
1 stop5h 16mDelta
Sat 5/311:30 pmORD - HOU
1 stop7h 47mDelta
Deal found 4/16$217
This CheapOair deal was found by Cheapflights users on 4/17. 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 4/2411:21 amIAH - STL
1 stop22h 40mFrontier
Fri 4/256:58 pmSTL - IAH
1 stop28h 39mFrontier
Deal found 4/17$221
This Southwest deal was found by Cheapflights users on 4/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1711:10 amHOU - ORD
1 stop5h 15mSouthwest
Wed 5/215:45 pmORD - HOU
1 stop4h 25mSouthwest
Deal found 4/16$228

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 April 17, 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

Sat 5/17

9:10 am-11:50 am

Nonstop2h 40m

Chicago O'Hare Intl

Tue 5/20

9:14 pm-11:59 pm

Nonstop2h 45m

$106

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Wed 5/7

10:40 am-1:17 pm

Nonstop2h 37m

Chicago Midway

Wed 5/21

12:21 pm-3:18 pm

Nonstop2h 57m

$106

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 5/9

1:14 pm-3:57 pm

Nonstop2h 43m

Chicago O'Hare Intl

Tue 5/13

9:14 pm-11:59 pm

Nonstop2h 45m

$118

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 5/9

1:14 pm-3:57 pm

Nonstop2h 43m

Chicago O'Hare Intl

Fri 5/16

1:00 pm-3:53 pm

Nonstop2h 53m

$143

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Sat 5/17

9:00 pm-11:30 pm

Nonstop2h 30m

Chicago Midway

Sat 5/24

5:20 pm-8:00 pm

Nonstop2h 40m

$178

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 5/7

1:29 pm-4:12 pm

Nonstop2h 43m

Chicago O'Hare Intl

Wed 5/21

6:00 pm-9:03 pm

Nonstop3h 03m

$188

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 5/24

5:30 am-12:41 pm

1 stop7h 11m

Chicago O'Hare Intl

Sat 5/31

11:05 am-4:11 pm

1 stop5h 06m

$217

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Wed 5/28

6:00 am-11:53 am

1 stop5h 53m

Chicago Midway

Sat 5/31

6:00 am-10:50 am

1 stop4h 50m

$217

HoustonChicago

HOU - ORD

HOUORD

Houston Hobby

Wed 5/28

6:42 pm-11:58 pm

1 stop5h 16m

Chicago O'Hare Intl

Sat 5/31

1:30 pm-9:17 pm

1 stop7h 47m

$217

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 4/24

11:21 am-10:01 am

1 stop22h 40m

Lambert-St Louis

Fri 4/25

6:58 pm-11:37 pm

1 stop28h 39m

$221

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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 April 17, 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 April 17, 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
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Allegiant Air
7.3
Good
734 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 $52. Frontier flights start at $53 while deals on Southwest start at $89 one-way.

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

    While some choose either Houston Hobby - Chicago O'Hare Intl or Houston George Bush Intcntl - Chicago O'Hare Intl, Houston Hobby - Chicago Midway 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

Browse thousands of different options on Cheapflights for your next trip

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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$145FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$62Average$150FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$147Average$408FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$147Average$390FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$406FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$197Average$341FlexibilityNo cancel feeOn-time63%

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