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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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — ORD
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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 March 25, 2025.

Round-trip from

$116
(CheapOair)

One-way from

$49
(Frontier)

Popular in

March

Cheapest in

September

Average price

$231

Good round-trip deal

$112 or less

Good one-way deal

$82 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. 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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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 March 25, 2025.

This CheapOair deal was found by Cheapflights users on 3/24. 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.
Sat 4/197:55 amIAH - ORD
Nonstop2h 45mSpirit Airlines
Tue 4/229:38 pmORD - IAH
1 stop13h 06mSpirit Airlines
Deal found 3/24$116
This Frontier deal was found by Cheapflights users on 3/24. 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 4/3012:44 pmIAH - MDW
Nonstop2h 29mFrontier
Mon 5/53:49 pmMDW - IAH
Nonstop3h 01mFrontier
Deal found 3/24$123
This CheapOair deal was found by Cheapflights users on 3/24. 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 4/105:00 amIAH - ORD
Nonstop2h 40mMultiple Airlines
Tue 4/157:20 amORD - IAH
Nonstop2h 59mMultiple Airlines
Deal found 3/24$143
This Trip.com deal was found by Cheapflights users on 3/24. 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.
Tue 4/1511:19 amIAH - ORD
Nonstop2h 46mFrontier
Thu 4/176:30 amORD - IAH
Nonstop3h 06mFrontier
Deal found 3/24$154
This American Airlines deal was found by Cheapflights users on 3/24. 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 4/231:25 pmIAH - ORD
Nonstop2h 40mAmerican Airlines
Sat 4/268:25 pmORD - IAH
Nonstop3h 00mAmerican Airlines
Deal found 3/24$177
This American Airlines deal was found by Cheapflights users on 3/24. 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.
Mon 4/145:00 amIAH - STL
1 stop4h 01mAmerican Airlines
Sun 4/205:26 amSTL - IAH
1 stop3h 58mAmerican Airlines
Deal found 3/24$196
This Delta deal was found by Cheapflights users on 3/24. 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.
Mon 4/146:32 pmIAH - STL
1 stop5h 04mDelta
Thu 4/176:00 amSTL - IAH
1 stop5h 05mDelta
Deal found 3/24$197
This American Airlines deal was found by Cheapflights users on 3/24. 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 4/196:25 amIAH - PIA
1 stop4h 23mAmerican Airlines
Sat 4/265:16 pmPIA - IAH
1 stop6h 09mAmerican Airlines
Deal found 3/24$198
This American Airlines deal was found by Cheapflights users on 3/23. 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 4/1610:04 amIAH - MLI
1 stop4h 47mAmerican Airlines
Tue 4/227:53 amMLI - IAH
1 stop4h 52mAmerican Airlines
Deal found 3/23$199
This United Airlines deal was found by Cheapflights users on 3/25. 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 5/268:05 pmIAH - STL
Nonstop2h 10mUnited Airlines
Sat 5/316:15 amSTL - IAH
Nonstop2h 18mUnited Airlines
Deal found 3/25$212
This Delta deal was found by Cheapflights users on 3/23. 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 - ORD
1 stop6h 45mDelta
Tue 4/299:30 amORD - IAH
1 stop5h 24mDelta
Deal found 3/23$217
This Mytrip deal was found by Cheapflights users on 3/24. 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.
Fri 5/98:44 pmIAH - STL
1 stop12h 31mSpirit Airlines
Sun 5/1110:10 amSTL - IAH
1 stop21h 38mSpirit Airlines
Deal found 3/24$222

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 March 25, 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 - MDW

IAHMDW

Houston George Bush Intcntl

Wed 4/30

12:44 pm-3:13 pm

Nonstop2h 29m

Chicago Midway

Mon 5/5

3:49 pm-6:50 pm

Nonstop3h 01m

$123

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 5/17

7:05 pm-9:50 pm

Nonstop2h 45m

Chicago O'Hare Intl

Mon 5/19

11:00 am-6:00 pm

1 stop7h 00m

$126

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 4/10

5:00 am-7:40 am

Nonstop2h 40m

Chicago O'Hare Intl

Tue 4/15

7:20 am-10:19 am

Nonstop2h 59m

$143

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Tue 4/15

11:19 am-2:05 pm

Nonstop2h 46m

Chicago O'Hare Intl

Thu 4/17

6:30 am-9:36 am

Nonstop3h 06m

$154

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 4/23

1:25 pm-4:05 pm

Nonstop2h 40m

Chicago O'Hare Intl

Sat 4/26

8:25 pm-11:25 pm

Nonstop3h 00m

$177

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 4/14

5:00 am-9:01 am

1 stop4h 01m

Lambert-St Louis

Sun 4/20

5:26 am-9:24 am

1 stop3h 58m

$196

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 4/14

6:32 pm-11:36 pm

1 stop5h 04m

Lambert-St Louis

Thu 4/17

6:00 am-11:05 am

1 stop5h 05m

$197

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Sat 4/19

6:25 am-10:48 am

1 stop4h 23m

Greater Peoria

Sat 4/26

5:16 pm-11:25 pm

1 stop6h 09m

$198

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Wed 4/16

10:04 am-2:51 pm

1 stop4h 47m

Moline Quad-City

Tue 4/22

7:53 am-12:45 pm

1 stop4h 52m

$199

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 5/26

8:05 pm-10:15 pm

Nonstop2h 10m

Lambert-St Louis

Sat 5/31

6:15 am-8:33 am

Nonstop2h 18m

$212

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 51 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, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Illinois (average of $245). Flying from Houston George Bush Intcntl Airport 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 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 March 25, 2025.

When flying from Houston George Bush Intcntl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Houston George Bush Intcntl Airport to Illinois

Explore weekly flight availability from George Bush Intcntl to Illinois. 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 March 25, 2025.

The most flights from IAH to USIL are scheduled on a Monday (53 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (35 on average).

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 25, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from Houston to Illinois to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,782 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Spirit Airlines
6.3
Okay
7,878 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • 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 $49. However, be on the lookout for offers from Spirit Airlines 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 - 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 (89%), Japan Airlines (87%) or Brussels Airlines (87%) 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 $37. On average you can expect to pay $1,770. The most popular route, (Houston George Bush Intcntl - Chicago O'Hare Intl), can usually be booked for $123.

  • 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, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Illinois (average of $245). Flying from Houston George Bush Intcntl Airport 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.

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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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$144FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$66Average$140FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$145Average$355FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$146Average$391FlexibilityNo cancel feeOn-time69%
DeltaCheapest$196Average$406FlexibilityNo cancel feeOn-timeN/A
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