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George Bush Intcntl

$55+ Cheap flights from Illinois to George Bush Intcntl (IAH)

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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IAH
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Illinois to George Bush Intcntl

Keep the following information in mind while searching for Illinois to George Bush Intcntl flight deals. Data was last updated September 15, 2025.

Round-trip from

$90
(Cheapflightsfares)

One-way from

$55
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$177

Good round-trip deal

$136 or less

Good one-way deal

$110 or less
From Illinois to Houston George Bush Intcntl
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One-way flight from Illinois to Houston George Bush Intcntl
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Highest demand for flights based on searches. 7% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to Houston George Bush Intcntl.
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Price to beat on a one-way flight from Illinois to Houston George Bush Intcntl.
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Find flight deals from Illinois to George Bush Intcntl

Cheapest flights from Illinois to George Bush Intcntl
Explore the most affordable flight options available from Illinois to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 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.
Tue 11/187:35 amORD - IAH
Nonstop2h 45mSpirit Airlines
Tue 12/24:29 pmIAH - ORD
Nonstop2h 47mSpirit Airlines
Deal found 9/14$90
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.
Sat 10/411:37 amORD - IAH
Nonstop2h 43mMultiple Airlines
Sun 10/58:00 pmIAH - ORD
Nonstop2h 45mMultiple Airlines
Deal found 9/13$91
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.
Mon 9/222:26 pmMDW - IAH
Nonstop2h 48mFrontier
Sun 9/2810:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 9/14$92
This Booking.com deal was found by Cheapflights users on 9/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:35 amORD - IAH
Nonstop2h 45mSpirit Airlines
Sat 11/154:29 pmIAH - ORD
Nonstop2h 47mSpirit Airlines
Deal found 9/12$92
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/222:26 pmMDW - IAH
Nonstop2h 48mFrontier
Thu 9/2510:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 9/13$93
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:36 pmORD - IAH
Nonstop2h 57mFrontier
Thu 11/69:04 pmIAH - ORD
Nonstop2h 37mFrontier
Deal found 9/13$94
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:30 amMDW - IAH
Nonstop2h 52mFrontier
Sat 11/810:04 amIAH - MDW
Nonstop2h 33mFrontier
Deal found 9/15$95
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.
Thu 11/61:36 pmORD - IAH
Nonstop2h 57mFrontier
Sun 11/99:04 pmIAH - ORD
Nonstop2h 37mFrontier
Deal found 9/14$95
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/91:14 pmORD - IAH
Nonstop2h 57mFrontier
Sun 10/199:54 pmIAH - ORD
Nonstop2h 32mFrontier
Deal found 9/13$96
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.
Fri 10/311:36 pmORD - IAH
Nonstop2h 57mFrontier
Mon 11/39:04 pmIAH - ORD
Nonstop2h 37mFrontier
Deal found 9/14$97
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.
Fri 10/32:26 pmMDW - IAH
Nonstop2h 48mFrontier
Sun 10/510:08 amIAH - MDW
Nonstop2h 38mFrontier
Deal found 9/13$99
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.
Fri 10/34:03 pmORD - IAH
Nonstop3h 07mFrontier
Mon 10/67:55 pmIAH - ORD
Nonstop2h 48mFrontier
Deal found 9/15$100

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to George Bush Intcntl 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 September 15, 2025.
Use the filters below to find and compare flights from Illinois to Houston George Bush Intcntl Airport that are best for you.

Fly from

Illinois

Fly to

George Bush Intcntl

Route

Depart

Return

Price

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Sat 11/8

8:41 am-8:33 pm

1 stop11h 52m

Houston George Bush Intcntl

Sat 11/15

4:29 pm-7:16 pm

Nonstop2h 47m

$115

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Wed 10/29

9:08 pm-11:59 pm

Nonstop2h 51m

Houston George Bush Intcntl

Sat 11/1

8:05 am-10:46 am

Nonstop2h 41m

$133

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Thu 10/23

10:30 am-1:22 pm

Nonstop2h 52m

Houston George Bush Intcntl

Sun 10/26

2:12 pm-4:42 pm

Nonstop2h 30m

$141

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Thu 10/9

10:30 am-1:22 pm

Nonstop2h 52m

Houston George Bush Intcntl

Sun 10/12

6:00 am-9:31 am

1 stop27h 31m

$144

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sat 10/4

6:15 am-5:01 pm

1 stop10h 46m

Houston George Bush Intcntl

Mon 10/6

6:09 pm-8:46 pm

Nonstop2h 37m

$146

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Mon 9/22

8:49 pm-3:36 pm

1 stop18h 47m

Houston George Bush Intcntl

Sun 9/28

5:04 pm-4:51 pm

1 stop23h 47m

$151

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Sun 10/12

5:20 am-4:38 pm

1 stop11h 18m

Houston George Bush Intcntl

Mon 10/13

10:55 am-11:46 pm

1 stop12h 51m

$154

ChicagoHouston

MDW - IAH

MDWIAH

Chicago Midway

Fri 10/10

9:00 am-11:49 am

Nonstop2h 49m

Houston George Bush Intcntl

Mon 10/13

10:55 am-11:46 pm

1 stop12h 51m

$161

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 9/27

7:55 pm-11:09 am

1 stop15h 14m

Houston George Bush Intcntl

Wed 10/1

7:30 am-9:06 am

1 stop25h 36m

$176

ChicagoHouston

ORD - IAH

ORDIAH

Chicago O'Hare Intl

Wed 10/29

9:08 pm-11:59 pm

Nonstop2h 51m

Houston George Bush Intcntl

Fri 10/31

9:43 pm-12:15 am

Nonstop2h 32m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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

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

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

Currently, August is the cheapest month in which you can book a flight from Illinois to Houston George Bush Intcntl Airport (average of $241). Flying from Illinois to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). 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 IL to IAH?

Find hourly flight availability from Illinois to George Bush Intcntl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Houston George Bush Intcntl Airport as you normally would.

Weekly flight availability from Illinois to Houston George Bush Intcntl Airport

Explore weekly flight availability from Illinois to George Bush Intcntl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

The most flights from USIL to IAH are scheduled on a Monday (63 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (48 on average).

Related info for your journey

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

    There are many flights that can get you from Illinois to Houston George Bush Intcntl Airport in 2h 51m. Fly via Spirit Airlines, United Airlines, or Frontier to get the fastest option. Airlines will cover a distance of 926 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $58. However, be on the lookout for offers from Spirit Airlines and Delta, as they are both options that can get you from Illinois to Houston George Bush Intcntl Airport for a low price.

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

    The most popular flight routes from Illinois to Houston George Bush Intcntl Airport are Chicago O'Hare Intl - Houston George Bush Intcntl, Chicago Midway - Houston George Bush Intcntl and Lambert-St Louis - Houston George Bush Intcntl.

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

    The top 3 most reliable airlines when flying from Illinois to Houston George Bush Intcntl Airport are Avianca (86%), Republic Airways (78%) and Aer Lingus (77%).

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

    Looking at all options, your cheapest flight can be booked for $53. While the most popular route (Chicago O'Hare Intl - Houston George Bush Intcntl) can be booked for $83 on average, our data indicates $903 when flying from Illinois to Houston George Bush Intcntl Airport.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Illinois to Houston George Bush Intcntl Airport (average of $241). Flying from Illinois to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). 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

Traveling to a place near Houston George Bush Intcntl Airport?

Book flights to Houston George Bush Intcntl Airport if you plan to visit one of these locations
Montgomery
Spring
Jersey Village
Humble
The Woodlands
Conroe
Tomball
Katy
Cypress

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Top 5 airlines flying from Illinois to George Bush Intcntl

Discover the top 5 airlines that operate flights from Illinois to George Bush Intcntl. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$164FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$74Average$173FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$157Average$367FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$176Average$342FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$287FlexibilityNo cancel feeOn-timeN/A

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