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 1h 57m. United Airlines provides one of the quickest options available for as low as $115. Houston George Bush Intcntl Airport and Illinois are separated by a distance of 668 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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.

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).

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 cheapest flights from Houston George Bush Intcntl Airport to Illinois?

The cheapest flight price from Houston George Bush Intcntl Airport to Illinois is $40. On average you can expect to pay $784. The most popular route, (Houston George Bush Intcntl - Chicago O'Hare Intl), can usually be booked for $90.

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 (84%), Spirit Airlines (81%) or Air New Zealand (81%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Houston George Bush Intcntl Airport to Illinois?

Consider American Airlines, Frontier or Spirit Airlines when booking your flight. These represent the most popular airlines when flying from Houston George Bush Intcntl Airport to Illinois.

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.

$51+ Cheap Flights from Houston George Bush Intcntl Airport to Illinois

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Cheap flight deals from George Bush Intcntl to Illinois

Round-trip from	$90 (Cheapflightsfares)
One-way from	$51 (Kiwi.com)
Popular in	June
Cheapest in	October
Average price	$190
Good round-trip deal	$108 or less
Good one-way deal	$97 or less

From Houston George Bush Intcntl to Illinois

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One-way flight from Houston George Bush Intcntl to Illinois

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($4 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 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 September 17, 2025.

Sat 11/84:29 pmIAH - ORD

Nonstop2h 47mSpirit Airlines

Tue 11/187:35 amORD - IAH

Nonstop2h 45mSpirit Airlines

Deal found 9/17

$90

Mon 10/205:42 pmIAH - ORD

1 stop5h 57mFrontier

Sat 10/251:14 pmORD - IAH

Nonstop2h 57mFrontier

Deal found 9/16

$95

Fri 10/38:00 pmIAH - ORD

Nonstop2h 45mFrontier

Mon 10/64:03 pmORD - IAH

Nonstop3h 07mFrontier

Deal found 9/15

$100

Wed 11/124:29 pmIAH - ORD

Nonstop2h 47mSpirit Airlines

Fri 11/147:35 amORD - IAH

Nonstop2h 45mSpirit Airlines

Deal found 9/16

$103

Thu 10/92:12 pmIAH - MDW

Nonstop2h 30mFrontier

Sat 10/1110:00 amMDW - IAH

Nonstop2h 52mFrontier

Deal found 9/16

$103

Tue 9/3010:23 amIAH - ORD

Nonstop2h 46mSpirit Airlines

Fri 10/38:56 pmORD - IAH

Nonstop2h 49mSpirit Airlines

Deal found 9/16

$105

Fri 11/79:04 pmIAH - ORD

Nonstop2h 37mFrontier

Mon 11/171:36 pmORD - IAH

Nonstop2h 57mFrontier

Deal found 9/17

$107

Fri 10/1710:12 pmIAH - ORD

Nonstop2h 32mFrontier

Mon 10/206:00 amORD - IAH

Nonstop2h 51mFrontier

Deal found 9/15

$108

Thu 10/165:57 pmIAH - MDW

1 stop5h 49mFrontier

Mon 10/209:00 amMDW - IAH

Nonstop2h 49mFrontier

Deal found 9/15

$108

Sat 10/185:28 pmIAH - ORD

Nonstop2h 46mFrontier

Mon 10/206:00 amORD - IAH

Nonstop2h 51mFrontier

Deal found 9/15

$109

Sat 10/181:39 pmIAH - MDW

Nonstop2h 30mFrontier

Mon 10/206:15 amMDW - IAH

1 stop10h 32mFrontier

Deal found 9/15

$109

Mon 10/1310:12 pmIAH - ORD

Nonstop2h 32mFrontier

Mon 10/206:00 amORD - IAH

Nonstop2h 51mFrontier

Deal found 9/16

$110

Best flights from George Bush Intcntl to Illinois
Discover carefully curated flight deals from George Bush Intcntl to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2025.

Fri 10/175:00 pmIAH - STL

Nonstop1h 57mUnited Airlines

Mon 10/206:15 amSTL - IAH

Nonstop2h 11mUnited Airlines

Deal found 9/15

$115

Sat 10/185:28 pmIAH - ORD

Nonstop2h 46mFrontier

Tue 10/213:12 pmORD - IAH

1 stop5h 51mFrontier

Deal found 9/15

$146

Mon 10/206:00 amIAH - ORD

Nonstop2h 47mAmerican Airlines

Wed 10/229:50 amORD - IAH

Nonstop2h 48mAmerican Airlines

Deal found 9/16

$212

Thu 2/1911:30 amIAH - ORD

1 stop7h 16mDelta

Wed 2/257:00 amORD - IAH

1 stop7h 55mDelta

Deal found 9/16

$217

Fri 10/311:43 pmIAH - STL

Nonstop2h 07mUnited Airlines

Mon 11/34:35 pmSTL - IAH

Nonstop2h 30mUnited Airlines

Deal found 9/15

$115

Wed 10/158:37 pmIAH - EVV

1 stop12h 58mMultiple Airlines

Sun 10/198:17 pmEVV - IAH

1 stop20h 26mMultiple Airlines

Deal found 9/16

$276

Thu 10/235:57 pmIAH - MDW

1 stop5h 49mFrontier

Mon 10/2712:03 pmMDW - IAH

1 stop10h 00mFrontier

Deal found 9/15

$153

Tue 11/48:15 amIAH - ORD

Nonstop2h 41mUnited Airlines

Tue 11/45:10 pmORD - IAH

Nonstop3h 00mUnited Airlines

Deal found 9/14

$157

Thu 11/67:42 pmIAH - STL

1 stop17h 35mFrontier

Sat 11/87:45 pmSTL - IAH

1 stop14h 52mFrontier

Deal found 9/16

$164

Thu 10/95:00 amIAH - ORD

Nonstop2h 50mUnited Airlines

Sat 10/182:20 pmORD - IAH

Nonstop2h 55mUnited Airlines

Deal found 9/16

$157

Wed 12/35:10 amIAH - MDW

1 stop6h 45mDelta

Sat 12/61:50 pmMDW - IAH

1 stop8h 00mDelta

Deal found 9/16

$217

Fri 10/175:00 amIAH - ORD

Nonstop2h 50mUnited Airlines

Tue 10/219:05 pmORD - IAH

Nonstop2h 54mUnited Airlines

Deal found 9/15

$177

Thu 2/195:25 amIAH - MDW

1 stop7h 10mDelta

Tue 2/245:25 pmMDW - IAH

1 stop6h 34mDelta

Deal found 9/16

$217

Sun 10/197:20 amIAH - ORD

Nonstop2h 50mUnited Airlines

Wed 10/225:50 pmORD - IAH

Nonstop2h 54mUnited Airlines

Deal found 9/16

$177

Wed 2/185:25 amIAH - MDW

1 stop7h 10mDelta

Sat 2/214:30 pmMDW - IAH

1 stop7h 29mDelta

Deal found 9/15

$217

Thu 10/306:01 amIAH - MLI

1 stop4h 13mAmerican Airlines

Sun 11/25:56 amMLI - IAH

1 stop7h 37mAmerican Airlines

Deal found 9/16

$279

Sat 10/1812:55 pmIAH - MDW

1 stop5h 30mDelta

Tue 10/2810:35 amMDW - IAH

1 stop4h 51mDelta

Deal found 9/16

$217

Fri 11/76:30 amIAH - RFD

1 stop9h 58mMultiple Airlines

Mon 11/105:18 pmRFD - IAH

1 stop29h 55mMultiple Airlines

Deal found 9/16

$290

Mon 10/278:20 pmIAH - STL

Nonstop2h 02mUnited Airlines

Thu 10/306:15 amSTL - IAH

Nonstop2h 19mUnited Airlines

Deal found 9/15

$181

Wed 2/1810:01 amIAH - MLI

2 stops7h 33mAmerican Airlines

Sat 2/2111:32 amMLI - IAH

2 stops10h 35mAmerican Airlines

Deal found 9/14

$283

Tue 3/35:25 amIAH - MDW

1 stop7h 10mDelta

Wed 3/45:25 pmMDW - IAH

1 stop6h 34mDelta

Deal found 9/14

$217

Fri 11/74:45 pmIAH - STL

Nonstop2h 02mUnited Airlines

Thu 11/136:15 amSTL - IAH

Nonstop2h 19mUnited Airlines

Deal found 9/15

$185

Sun 10/198:37 pmIAH - RFD

1 stop17h 40mMultiple Airlines

Wed 10/228:56 pmRFD - IAH

2 stops18h 43mMultiple Airlines

Deal found 9/16

$315

Sat 10/184:21 pmIAH - MDW

1 stop5h 53mDelta

Wed 10/296:00 amMDW - IAH

1 stop4h 54mDelta

Deal found 9/16

$217

Sat 2/215:01 amIAH - PIA

1 stop5h 16mAmerican Airlines

Wed 2/256:33 amPIA - IAH

1 stop4h 47mAmerican Airlines

Deal found 9/16

$294

Fri 11/74:45 pmIAH - STL

Nonstop2h 02mUnited Airlines

Mon 11/174:35 pmSTL - IAH

Nonstop2h 30mUnited Airlines

Deal found 9/15

$185

Tue 10/77:05 amIAH - MDW

1 stop4h 48mDelta

Sat 10/1110:35 amMDW - IAH

1 stop4h 51mDelta

Deal found 9/14

$217

Sat 11/88:35 amIAH - STL

Nonstop2h 04mUnited Airlines

Mon 11/174:35 pmSTL - IAH

Nonstop2h 30mUnited Airlines

Deal found 9/15

$185

Tue 10/2112:55 pmIAH - MDW

1 stop5h 30mDelta

Fri 10/245:04 pmMDW - IAH

1 stop6h 55mDelta

Deal found 9/16

$217

Wed 11/58:51 pmIAH - RFD

1 stop15h 02mMultiple Airlines

Sun 11/912:43 pmRFD - IAH

2 stops30h 28mMultiple Airlines

Deal found 9/15

$356

Last-minute flights from George Bush Intcntl to Illinois
Discover last-minute flight deals from George Bush Intcntl to Illinois. Data last updated September 17, 2025 and is based on user searches.

Tue 9/3010:23 amIAH - ORD

Nonstop2h 46mSpirit Airlines

Fri 10/38:56 pmORD - IAH

Nonstop2h 49mSpirit Airlines

Deal found 9/16

$105

Wed 10/110:23 amIAH - ORD

Nonstop2h 46mSpirit Airlines

Fri 10/38:56 pmORD - IAH

Nonstop2h 49mSpirit Airlines

Deal found 9/17

$103

Fri 10/38:00 pmIAH - ORD

Nonstop2h 45mFrontier

Mon 10/64:03 pmORD - IAH

Nonstop3h 07mFrontier

Deal found 9/15

$100

Sun 10/58:00 pmIAH - ORD

Nonstop2h 45mFrontier

Sat 10/111:14 pmORD - IAH

Nonstop2h 57mFrontier

Deal found 9/15

$111

Thu 10/92:12 pmIAH - MDW

Nonstop2h 30mFrontier

Sat 10/1110:00 amMDW - IAH

Nonstop2h 52mFrontier

Deal found 9/16

$103

Mon 10/1310:12 pmIAH - ORD

Nonstop2h 32mFrontier

Mon 10/206:00 amORD - IAH

Nonstop2h 51mFrontier

Deal found 9/16

$110

Thu 10/165:57 pmIAH - MDW

1 stop5h 49mFrontier

Mon 10/209:00 amMDW - IAH

Nonstop2h 49mFrontier

Deal found 9/15

$108

Fri 10/1710:12 pmIAH - ORD

Nonstop2h 32mFrontier

Mon 10/206:00 amORD - IAH

Nonstop2h 51mFrontier

Deal found 9/15

$108

Sat 10/185:28 pmIAH - ORD

Nonstop2h 46mFrontier

Mon 10/206:00 amORD - IAH

Nonstop2h 51mFrontier

Deal found 9/15

$109

Sat 10/181:39 pmIAH - MDW

Nonstop2h 30mFrontier

Mon 10/206:15 amMDW - IAH

1 stop10h 32mFrontier

Deal found 9/15

$109

Mon 10/205:42 pmIAH - ORD

1 stop5h 57mFrontier

Sat 10/251:14 pmORD - IAH

Nonstop2h 57mFrontier

Deal found 9/16

$95

Fri 10/319:09 pmIAH - ORD

Nonstop2h 35mFrontier

Sun 11/91:36 pmORD - IAH

Nonstop2h 57mFrontier

Deal found 9/15

$107

One-way flights from George Bush Intcntl to Illinois
Search for one-way flight options from George Bush Intcntl to Illinois. Find affordable one-way fares based on user searches. Data last updated September 17, 2025.

Thu 11/207:45 pmIAH - MDW

Nonstop2h 32mFrontier

Deal found 9/15

$51

Wed 10/151:09 pmIAH - ORD

1 stop10h 36mSpirit Airlines

Deal found 9/16

$57

Thu 12/46:30 amIAH - ORD

Nonstop2h 40mSpirit Airlines

Deal found 9/16

$58

Sun 10/197:57 pmIAH - STL

Nonstop2h 03mUnited Airlines

Deal found 9/14

$58

Mon 10/2010:12 pmIAH - ORD

Nonstop2h 32mFrontier

Deal found 9/16

$59

Tue 12/27:55 pmIAH - STL

Nonstop2h 03mUnited Airlines

Deal found 9/15

$59

Tue 9/3010:23 amIAH - ORD

Nonstop2h 46mSpirit Airlines

Deal found 9/16

$60

Tue 10/141:09 pmIAH - ORD

1 stop10h 36mSpirit Airlines

Deal found 9/16

$62

Fri 10/1010:12 pmIAH - ORD

Nonstop2h 32mFrontier

Deal found 9/17

$63

Mon 10/1310:12 pmIAH - ORD

Nonstop2h 32mFrontier

Deal found 9/17

$64

Fri 12/511:02 amIAH - MDW

Nonstop2h 34mFrontier

Deal found 9/16

$64

Sun 11/169:09 pmIAH - ORD

Nonstop2h 35mFrontier

Deal found 9/17

$67

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 10/17

5:00 pm-6:57 pm

Nonstop1h 57m

Lambert-St Louis

Mon 10/20

6:15 am-8:26 am

Nonstop2h 11m

$115

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 10/31

1:43 pm-3:50 pm

Nonstop2h 07m

Lambert-St Louis

Mon 11/3

4:35 pm-7:05 pm

Nonstop2h 30m

$115

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 10/18

5:28 pm-8:14 pm

Nonstop2h 46m

Chicago O'Hare Intl

Tue 10/21

3:12 pm-9:03 pm

1 stop5h 51m

$146

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Thu 10/23

5:57 pm-11:46 pm

1 stop5h 49m

Chicago Midway

Mon 10/27

12:03 pm-10:03 pm

1 stop10h 00m

$153

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Tue 11/4

8:15 am-10:56 am

Nonstop2h 41m

Chicago O'Hare Intl

Tue 11/4

5:10 pm-8:10 pm

Nonstop3h 00m

$157

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 10/9

5:00 am-7:50 am

Nonstop2h 50m

Chicago O'Hare Intl

Sat 10/18

2:20 pm-5:15 pm

Nonstop2h 55m

$157

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 11/6

7:42 pm-1:17 pm

1 stop17h 35m

Lambert-St Louis

Sat 11/8

7:45 pm-10:37 am

1 stop14h 52m

$164

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 10/17

5:00 am-7:50 am

Nonstop2h 50m

Chicago O'Hare Intl

Tue 10/21

9:05 pm-11:59 pm

Nonstop2h 54m

$177

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sun 10/19

7:20 am-10:10 am

Nonstop2h 50m

Chicago O'Hare Intl

Wed 10/22

5:50 pm-8:44 pm

Nonstop2h 54m

$177

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 10/27

8:20 pm-10:22 pm

Nonstop2h 02m

Lambert-St Louis

Thu 10/30

6:15 am-8:34 am

Nonstop2h 19m

$181

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results

...

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 $321). 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?

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

The most flights from IAH to USIL are scheduled on a Monday (73 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 on average).

Reviews of airlines servicing Illinois

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

8.0

Very good

7,961 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,961 reviews

Delta

8.0

Very good

7,961 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,926 reviews

Delta

8.0

Very good

7,961 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,961 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Spirit Airlines

6.3

Okay

8,023 reviews

Delta

8.0

Very good

7,961 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.8

Fair

3,173 reviews

Delta

8.0

Very good

7,961 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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 1h 57m. United Airlines provides one of the quickest options available for as low as $115. Houston George Bush Intcntl Airport and Illinois are separated by a distance of 668 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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 (84%), Spirit Airlines (81%) or Air New Zealand (81%) 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 $40. On average you can expect to pay $784. The most popular route, (Houston George Bush Intcntl - Chicago O'Hare Intl), can usually be booked for $90.
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 $321). 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

Top 5 airlines flying from George Bush Intcntl to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$75	Average$178	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$79	Average$167	FlexibilityNo cancel fee	On-time65%
American Airlines	Cheapest$160	Average$401	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$177	Average$398	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$216	Average$331	FlexibilityNo cancel fee	On-timeN/A

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$51+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from George Bush Intcntl to Illinois with Cheapflights

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2. Select your favorite providers

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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 September 17, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from George Bush Intcntl to Illinois

Cheapest flights from George Bush Intcntl to IllinoisExplore 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 September 17, 2025.

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 September 17, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Illinois that are best for you.

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.

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?

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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 September 17, 2025.

Weekly flight availability from Houston George Bush Intcntl Airport to Illinois

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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?

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

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

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Top 5 airlines flying from George Bush Intcntl to Illinois

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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 September 17, 2025.