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$49+ Cheap flights from George Bush Intcntl (IAH) 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from George Bush Intcntl to Illinois

Cheapest flights from George Bush Intcntl to Illinois
Explore the most affordable flight options available from George Bush Intcntl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Thu 12/254:21 pmIAH - ORD
Nonstop3h 00mMultiple Airlines
Mon 1/59:09 pmORD - IAH
Nonstop2h 50mMultiple Airlines
Deal found 12/15$98
This Super.com deal was found by Cheapflights users on 12/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmIAH - ORD
Nonstop2h 50mFrontier
Tue 1/611:59 amORD - IAH
Nonstop3h 03mFrontier
Deal found 12/17$104
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:21 pmIAH - ORD
Nonstop3h 00mFrontier
Thu 1/18:21 pmORD - IAH
Nonstop3h 06mFrontier
Deal found 12/15$108
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Tue 1/69:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Deal found 12/16$113
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:21 pmIAH - ORD
Nonstop3h 00mFrontier
Mon 1/512:39 pmORD - IAH
1 stop10h 16mFrontier
Deal found 12/15$120
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/315:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Mon 1/59:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Deal found 12/15$123
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/315:30 pmIAH - ORD
Nonstop2h 34mMultiple Airlines
Thu 1/18:21 pmORD - IAH
Nonstop3h 06mMultiple Airlines
Deal found 12/15$127
This Priceline deal was found by Cheapflights users on 12/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmIAH - ORD
Nonstop2h 50mMultiple Airlines
Thu 1/19:09 pmORD - IAH
Nonstop2h 50mMultiple Airlines
Deal found 12/16$129
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmIAH - ORD
Nonstop2h 50mMultiple Airlines
Wed 12/319:09 pmORD - IAH
Nonstop2h 50mMultiple Airlines
Deal found 12/16$131
This Super.com deal was found by Cheapflights users on 12/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:30 pmIAH - ORD
Nonstop2h 34mSpirit Airlines
Wed 12/319:09 pmORD - IAH
Nonstop2h 50mSpirit Airlines
Deal found 12/15$134
This Super.com deal was found by Cheapflights users on 12/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmIAH - ORD
Nonstop2h 50mFrontier
Thu 1/18:21 pmORD - IAH
Nonstop3h 06mFrontier
Deal found 12/15$141
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:08 pmIAH - MDW
Nonstop2h 37mFrontier
Mon 1/52:16 pmMDW - IAH
Nonstop3h 07mFrontier
Deal found 12/15$145

Find flight deals from George Bush Intcntl to Illinois

Keep the following information in mind while searching for George Bush Intcntl to Illinois flight deals. Data was last updated December 18, 2025.

Round-trip from

$89
(CheapOair)

One-way from

$49
(Expedia)

Popular in

June

Cheapest in

February

Average price

$204

Good round-trip deal

$143 or less

Good one-way deal

$105 or less
From Houston George Bush Intcntl to Illinois
Search Deals
One-way flight from Houston George Bush Intcntl to Illinois
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Houston George Bush Intcntl to Illinois.
Search Deals
Price to beat on a one-way flight from Houston George Bush Intcntl to Illinois.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl 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 December 18, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Illinois that are best for you.

Fly from

George Bush Intcntl

Fly to

Illinois

Route

Depart

Return

Price

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 2/14

12:24 pm-3:17 pm

Nonstop2h 53m

Chicago O'Hare Intl

Mon 2/16

5:40 am-8:56 am

Nonstop3h 16m

$89

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 12/31

7:55 pm-10:45 pm

Nonstop2h 50m

Chicago O'Hare Intl

Tue 1/6

11:59 am-3:02 pm

Nonstop3h 03m

$98

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 1/9

11:38 am-2:17 pm

Nonstop2h 39m

Chicago O'Hare Intl

Sun 1/11

12:40 pm-3:45 pm

Nonstop3h 05m

$112

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 1/9

4:35 pm-11:46 pm

1 stop7h 11m

Chicago O'Hare Intl

Mon 1/12

9:23 am-10:56 pm

1 stop13h 33m

$124

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 1/7

5:46 am-10:33 pm

1 stop16h 47m

Lambert-St Louis

Tue 1/13

5:11 pm-11:11 am

1 stop18h 00m

$129

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Tue 2/17

7:30 am-4:57 pm

2 stops9h 27m

Chicago O'Hare Intl

Thu 2/19

9:00 am-12:00 pm

Nonstop3h 00m

$130

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 1/6

8:13 pm-10:33 pm

1 stop26h 20m

Lambert-St Louis

Sun 1/11

5:11 pm-10:01 am

1 stop16h 50m

$134

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 1/10

12:16 pm-10:33 pm

1 stop10h 17m

Lambert-St Louis

Mon 1/12

8:50 am-5:15 pm

1 stop8h 25m

$141

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 1/7

10:08 am-10:33 pm

2 stops12h 25m

Lambert-St Louis

Mon 1/12

5:11 pm-6:39 pm

1 stop25h 28m

$151

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 1/28

8:45 am-11:33 pm

1 stop14h 48m

Lambert-St Louis

Wed 2/11

8:17 pm-6:28 pm

2 stops22h 11m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results
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Best time to book a flight from George Bush Intcntl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from George Bush Intcntl 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 George Bush Intcntl Airport to Illinois

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Illinois?

Currently, September is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Illinois (average of $60). Flying from Houston George Bush Intcntl Airport 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 IAH to IL?

Find hourly flight availability from George Bush Intcntl 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 December 18, 2025.

One of the essential ways to save on airfare from Houston George Bush Intcntl Airport to Illinois is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 59% on airfare.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to Illinois?

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to Illinois. Price data was last updated on December 8, 2024.

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to Illinois flight should consider departing on Saturday mornings when fares are most often at their lowest. Sunday afternoons 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 December 18, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Houston George Bush Intcntl Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,008 reviews

Crew

8.5

Food

7.3

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Food

7.3

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,093 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Food

7.3

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,055 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Food

7.3

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Spirit Airlines
6.3
Okay
8,190 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Food

7.3

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.8
Fair
3,081 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Food

7.3

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl 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 George Bush Intcntl Airport to Illinois?

    A quick flight from Houston George Bush Intcntl Airport to Illinois can take about 2h 53m. Frontier provides one of the quickest options available for as low as $89. Houston George Bush Intcntl Airport and Illinois are separated by a distance of 926 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to Illinois one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $38. However, be on the lookout for offers from Frontier and United Airlines, as they are both options that can get you from Houston George Bush Intcntl Airport to Illinois for a low price.

  • What are the most popular routes from Houston George Bush Intcntl Airport to Illinois?

    The most popular route from Houston George Bush Intcntl Airport to Illinois is Houston George Bush Intcntl - Chicago O'Hare Intl. You may also consider Houston George Bush Intcntl - Lambert-St Louis or Houston George Bush Intcntl - Chicago Midway.

  • What are the most reliable airlines from Houston George Bush Intcntl Airport to Illinois?

    No one likes to see their flight delayed. When booking a flight from Houston George Bush Intcntl Airport to Illinois consider choosing British Airways (84%), ANA (75%) or Volaris (75%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Houston George Bush Intcntl Airport to Illinois?

    The cheapest flight price from Houston George Bush Intcntl Airport to Illinois is $39. On average you can expect to pay $902. The most popular route, (Houston George Bush Intcntl - Chicago O'Hare Intl), can usually be booked for $65.

  • Can I find deals for flights from George Bush Intcntl to Illinois that include hotel bookings?

    Yes. In addition to deals on George Bush Intcntl to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from George Bush Intcntl to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from George Bush Intcntl to Illinois.

  • Can I find deals for business class flights from George Bush Intcntl to Illinois?

    Yes. Cheapflights offers flight deals from George Bush Intcntl 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 George Bush Intcntl Airport to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Illinois (average of $60). Flying from Houston George Bush Intcntl Airport 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.

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Alternative routes for George Bush Intcntl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from George Bush Intcntl to Illinois

Discover the top 5 airlines that operate flights from George Bush Intcntl 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$76Average$187FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$82Average$165FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$157Average$336FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$172Average$379FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$346FlexibilityNo cancel feeOn-timeN/A

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