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$56+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — ORD
nov. 29 — déc. 61
sam. 11/29
sam. 12/6
1 adult, Economy
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Cheap 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 octobre 30, 2025.

Round-trip from

$97
(Priceline)

One-way from

$56
(Flightnetwork)

Popular in

June

Cheapest in

February

Average price

$190

Good round-trip deal

$132 or less

Good one-way deal

$64 or less
From Houston George Bush Intcntl to Illinois
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One-way flight from Houston George Bush Intcntl to Illinois
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Highest demand for flights based on searches. 10% potential increase in price ($22 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 October 2025
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Price to beat on a round-trip flight from Houston George Bush Intcntl to Illinois.
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Price to beat on a one-way flight from Houston George Bush Intcntl to Illinois.
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Find 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 octobre 30, 2025.

This Priceline deal was found by Cheapflights users on 10/29. 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.
ven. 12/58:58 pmIAH - ORD
Nonstop2h 44mFrontier
lun. 12/88:50 amORD - IAH
1 stop8h 24mFrontier
Deal found 10/29$97
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 12/48:49 amIAH - MDW
1 stop13h 09mFrontier
dim. 12/72:01 pmMDW - IAH
Nonstop3h 07mFrontier
Deal found 10/28$97
This Frontier deal was found by Cheapflights users on 10/29. 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.
ven. 11/2110:22 amIAH - ORD
Nonstop2h 51mFrontier
dim. 11/236:30 amORD - IAH
Nonstop2h 57mFrontier
Deal found 10/29$98
This Frontier deal was found by Cheapflights users on 10/30. 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.
jeu. 11/610:04 amIAH - MDW
Nonstop2h 33mFrontier
sam. 11/156:30 amMDW - IAH
Nonstop2h 49mFrontier
Deal found 10/30$98
This Frontier deal was found by Cheapflights users on 10/29. 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.
jeu. 11/69:04 pmIAH - ORD
Nonstop2h 37mFrontier
mar. 11/111:36 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 10/29$99
This Priceline deal was found by Cheapflights users on 10/29. 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.
mer. 11/127:00 amIAH - ORD
1 stop8h 39mMultiple Airlines
mer. 11/198:28 amORD - IAH
Nonstop2h 50mMultiple Airlines
Deal found 10/29$100
This Frontier deal was found by Cheapflights users on 10/30. 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.
ven. 11/1410:04 amIAH - MDW
Nonstop2h 33mFrontier
sam. 11/156:15 amMDW - IAH
1 stop5h 50mFrontier
Deal found 10/30$100
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
mar. 12/212:10 pmIAH - ORD
Nonstop2h 38mSpirit Airlines
jeu. 12/111:52 pmORD - IAH
Nonstop2h 46mSpirit Airlines
Deal found 10/30$101
This Frontier deal was found by Cheapflights users on 10/30. 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.
jeu. 11/69:04 pmIAH - ORD
Nonstop2h 37mFrontier
lun. 11/171:36 pmORD - IAH
Nonstop2h 57mFrontier
Deal found 10/30$102
This Frontier deal was found by Cheapflights users on 10/30. 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.
jeu. 11/610:04 amIAH - MDW
Nonstop2h 33mFrontier
lun. 11/176:30 amMDW - IAH
Nonstop2h 49mFrontier
Deal found 10/30$102
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
mer. 12/247:55 pmIAH - ORD
Nonstop2h 50mFrontier
jeu. 1/18:21 pmORD - IAH
Nonstop3h 06mFrontier
Deal found 10/29$103
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/1510:04 amIAH - MDW
Nonstop2h 33mFrontier
lun. 11/171:37 pmMDW - IAH
1 stop8h 31mFrontier
Deal found 10/28$103

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 octobre 30, 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

ven. 11/14

6:06 pm-12:11 am

1 stop6h 05m

Chicago O'Hare Intl

lun. 11/17

1:50 pm-8:09 pm

1 stop6h 19m

$127

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

ven. 11/14

12:49 pm-10:10 pm

1 stop9h 21m

Chicago Midway

lun. 11/17

8:30 am-8:26 pm

1 stop11h 56m

$127

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

jeu. 11/13

8:48 pm-9:07 am

1 stop12h 19m

Lambert-St Louis

ven. 11/14

12:09 pm-8:26 pm

1 stop8h 17m

$127

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

lun. 11/17

11:33 am-12:30 am

1 stop12h 57m

Chicago Midway

ven. 11/28

9:30 am-12:30 pm

Nonstop3h 00m

$139

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

lun. 11/17

11:10 pm-12:27 am

2 stops25h 17m

Chicago O'Hare Intl

ven. 11/28

6:30 am-9:27 am

Nonstop2h 57m

$143

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

mer. 12/24

6:08 pm-8:45 pm

Nonstop2h 37m

Chicago Midway

jeu. 12/25

6:12 am-5:05 pm

1 stop10h 53m

$150

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mer. 11/12

2:09 pm-9:07 am

1 stop18h 58m

Lambert-St Louis

lun. 11/17

7:45 pm-12:39 pm

1 stop16h 54m

$152

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

sam. 12/20

5:30 pm-8:04 pm

Nonstop2h 34m

Chicago O'Hare Intl

mar. 12/30

9:09 pm-11:59 pm

Nonstop2h 50m

$170

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

sam. 12/20

5:30 pm-8:04 pm

Nonstop2h 34m

Chicago O'Hare Intl

mar. 12/30

6:00 am-11:08 pm

1 stop17h 08m

$170

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

mar. 11/25

10:22 am-1:13 pm

Nonstop2h 51m

Chicago O'Hare Intl

sam. 11/29

6:20 am-9:17 am

Nonstop2h 57m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 January is currently the most expensive (average of $116). 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 octobre 30, 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 61% 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 Monday at noon when fares are most often at their lowest. Sunday at noon 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 octobre 30, 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
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Spirit Airlines
6.3
Okay
8,116 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Frontier
5.8
Fair
3,122 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 34m. Frontier provides one of the quickest options available for as low as $170. 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 Frontier, with whom users have recently found tickets for as low as $59. However, be on the lookout for offers from United Airlines and Delta, 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 - Chicago Midway or Houston George Bush Intcntl - Lambert-St Louis.

  • 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 ANA (92%), Brussels Airlines (89%) or Austrian Airlines (88%) 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 $65. On average you can expect to pay $742. The most popular route, (Houston George Bush Intcntl - Chicago O'Hare Intl), can usually be booked for $74.

  • 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 January is currently the most expensive (average of $116). 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 octobre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$190FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$168FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$165Average$342FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$178Average$422FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$346FlexibilityNo cancel feeOn-timeN/A

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