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$53+ 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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ORD
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Round-trip from

$106
(Cheapflightsfares)

One-way from

$53
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$231
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. 2% potential increase in price ($5 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 3/28. 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.
Thu 4/245:00 amIAH - ORD
Nonstop2h 40mSpirit Airlines
Mon 4/289:04 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Deal found 3/28$106
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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.
Mon 5/57:40 pmIAH - MDW
Nonstop2h 33mFrontier
Mon 5/123:49 pmMDW - IAH
Nonstop3h 01mFrontier
Deal found 3/27$106
This Mytrip deal was found by Cheapflights users on 3/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/245:00 amIAH - ORD
Nonstop2h 40mMultiple Airlines
Mon 4/2812:30 pmORD - IAH
Nonstop2h 59mMultiple Airlines
Deal found 3/27$114
This Cheapflightsfares deal was found by Cheapflights users on 3/28. 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.
Thu 4/1710:36 amIAH - ORD
Nonstop2h 43mFrontier
Sun 4/206:30 amORD - IAH
Nonstop3h 06mFrontier
Deal found 3/28$120
This Southwest deal was found by Cheapflights users on 3/27. 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 4/269:00 pmHOU - MDW
Nonstop2h 30mSouthwest
Sat 5/38:30 pmMDW - HOU
Nonstop2h 45mSouthwest
Deal found 3/27$177
This American Airlines deal was found by Cheapflights users on 3/27. 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.
Sat 4/266:25 amIAH - ORD
Nonstop2h 40mAmerican Airlines
Tue 4/299:50 amORD - IAH
Nonstop2h 55mAmerican Airlines
Deal found 3/27$177
This Southwest deal was found by Cheapflights users on 3/27. 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.
Fri 5/95:05 amHOU - STL
Nonstop2h 00mSouthwest
Mon 5/129:40 pmSTL - HOU
Nonstop2h 05mSouthwest
Deal found 3/27$197
This Delta deal was found by Cheapflights users on 3/27. 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.
Tue 4/229:37 amIAH - STL
1 stop6h 49mDelta
Wed 4/234:11 pmSTL - IAH
1 stop7h 45mDelta
Deal found 3/27$197
This Frontier deal was found by Cheapflights users on 3/27. 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.
Fri 5/94:43 pmIAH - STL
1 stop7h 31mFrontier
Sun 5/119:55 pmSTL - IAH
1 stop13h 23mFrontier
Deal found 3/27$198
This American Airlines deal was found by Cheapflights users on 3/27. 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.
Sat 4/199:08 amIAH - PIA
1 stop5h 55mAmerican Airlines
Sat 4/265:16 pmPIA - IAH
1 stop6h 09mAmerican Airlines
Deal found 3/27$199
This United Airlines deal was found by Cheapflights users on 3/26. 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.
Mon 5/57:55 pmIAH - STL
Nonstop2h 08mUnited Airlines
Wed 5/145:29 pmSTL - IAH
1 stop5h 29mUnited Airlines
Deal found 3/26$216
This Delta deal was found by Cheapflights users on 3/28. 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 4/264:00 pmHOU - MDW
1 stop6h 22mDelta
Tue 4/296:04 amMDW - HOU
1 stop7h 49mDelta
Deal found 3/28$217

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 March 28, 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

Mon 5/5

5:00 am-7:40 am

Nonstop2h 40m

Chicago O'Hare Intl

Mon 5/12

9:14 pm-11:59 pm

Nonstop2h 45m

$106

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Mon 5/5

7:40 pm-10:13 pm

Nonstop2h 33m

Chicago Midway

Mon 5/12

3:49 pm-6:50 pm

Nonstop3h 01m

$106

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 4/24

5:00 am-7:40 am

Nonstop2h 40m

Chicago O'Hare Intl

Mon 4/28

12:30 pm-3:29 pm

Nonstop2h 59m

$114

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 4/25

5:15 pm-8:01 pm

Nonstop2h 46m

Chicago O'Hare Intl

Mon 4/28

12:30 pm-3:29 pm

Nonstop2h 59m

$149

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Sat 4/26

9:00 pm-11:30 pm

Nonstop2h 30m

Chicago Midway

Sat 5/3

8:30 pm-11:15 pm

Nonstop2h 45m

$177

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 4/26

6:25 am-9:05 am

Nonstop2h 40m

Chicago O'Hare Intl

Tue 4/29

9:50 am-12:45 pm

Nonstop2h 55m

$177

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 4/22

9:37 am-4:26 pm

1 stop6h 49m

Lambert-St Louis

Wed 4/23

4:11 pm-11:56 pm

1 stop7h 45m

$197

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Fri 5/9

5:05 am-7:05 am

Nonstop2h 00m

Lambert-St Louis

Mon 5/12

9:40 pm-11:45 pm

Nonstop2h 05m

$197

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 5/9

4:43 pm-12:14 am

1 stop7h 31m

Lambert-St Louis

Sun 5/11

9:55 pm-11:18 am

1 stop13h 23m

$198

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Sat 4/19

9:08 am-3:03 pm

1 stop5h 55m

Greater Peoria

Sat 4/26

5:16 pm-11:25 pm

1 stop6h 09m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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 $323). 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 March 28, 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 March 28, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

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
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

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.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

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.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

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
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

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.
Allegiant Air
7.3
Good
731 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

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.

  • 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 $53. 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 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 $323). 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$142FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$60Average$148FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$145Average$387FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$146Average$401FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$195Average$361FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$406FlexibilityNo cancel feeOn-timeN/A
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