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Cheap flights from Houston George Bush Intcntl Airport to Illinois from $54

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Houston George Bush Intcntl Airport to Illinois departing on 5/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Houston George Bush Intcntl Airport to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
9:23 am - 12:13 pm
IAH
-
ORD
2h 50mnonstop
Frontier Logo
5:25 am - 8:32 am
ORD
-
IAH
3h 07mnonstop
$97Frontier
Thu, Apr 30 - Sun, May 10
Frontier Logo
11:32 am - 2:22 pm
IAH
-
ORD
2h 50mnonstop
Frontier Logo
8:25 am - 11:32 am
ORD
-
IAH
3h 07mnonstop
$98Frontier
Sat, Apr 25 - Tue, Apr 28
Spirit Airlines Logo
5:33 pm - 8:19 pm
IAH
-
ORD
2h 46mnonstop
Spirit Airlines Logo
7:55 am - 10:48 am
ORD
-
IAH
2h 53mnonstop
$102Spirit Airlines
Sat, Apr 18 - Tue, Apr 21
Spirit Airlines Logo
5:33 pm - 8:19 pm
IAH
-
ORD
2h 46mnonstop
Spirit Airlines Logo
7:55 am - 10:48 am
ORD
-
IAH
2h 53mnonstop
$108Spirit Airlines
Mon, May 18 - Tue, May 19
Delta Logo
8:29 am - 4:37 pm
IAH
-
MLI
8h 08m
1 stop
Delta Logo
5:17 pm - 11:54 pm
MLI
-
IAH
6h 37m
1 stop
$223Delta
Sat, May 23 - Sat, May 30
American Airlines Logo
6:29 pm - 11:55 pm
IAH
-
MLI
5h 26m
1 stop
American Airlines Logo
6:00 am - 1:17 pm
MLI
-
IAH
7h 17m
2 stops
$228American Airlines
Sat, May 23 - Sat, May 30
American Airlines Logo
6:27 pm - 11:54 pm
IAH
-
MLI
5h 27m
1 stop
American Airlines Logo
6:41 pm - 11:48 pm
MLI
-
IAH
5h 07m
1 stop
$256American Airlines
Sat, Apr 25 - Sun, Apr 26
United Airlines Logo
5:04 am - 10:10 am
IAH
-
PIA
5h 06m
1 stop
United Airlines Logo
1:21 pm - 8:39 pm
PIA
-
IAH
7h 18m
1 stop
$269United Airlines
Tue, Jun 2 - Tue, Aug 11
Delta Logo
5:24 am - 11:19 am
IAH
-
BMI
5h 55m
1 stop
Delta Logo
4:14 pm - 11:54 pm
BMI
-
IAH
7h 40m
1 stop
$271Delta
Wed, May 6 - Sat, May 9
United Airlines Logo
6:15 am - 12:36 pm
IAH
-
PIA
6h 21m
1 stop
United Airlines Logo
2:50 pm - 8:20 pm
PIA
-
IAH
5h 30m
1 stop
$309United Airlines
Sat, Apr 4 - Fri, Apr 10

Spirit Airlines flights from Houston George Bush Intcntl Airport to Illinois

Our best Spirit Airlines deals on Houston George Bush Intcntl Airport to Illinois flight tickets
Spirit Airlines
Apr 18
IAH5:33 pmHouston George Bush Intcntl
2h 46m
ORD8:19 pmChicago O'Hare Intl
Apr 21
ORD7:55 amChicago O'Hare Intl
2h 53m
IAH10:48 amHouston George Bush Intcntl
$102
Spirit Airlines
May 18
IAH5:33 pmHouston George Bush Intcntl
2h 46m
ORD8:19 pmChicago O'Hare Intl
May 19
ORD7:55 amChicago O'Hare Intl
2h 53m
IAH10:48 amHouston George Bush Intcntl
$108
Spirit Airlines
Apr 25
IAH12:35 pmHouston George Bush Intcntl
8h 37m
1 stop
ORD9:12 pmChicago O'Hare Intl
Apr 27
ORD6:16 pmChicago O'Hare Intl
2h 54m
IAH9:10 pmHouston George Bush Intcntl
$110

Frontier flights from Houston George Bush Intcntl Airport to Illinois

Our best Frontier deals on Houston George Bush Intcntl Airport to Illinois flight tickets
Frontier
Apr 30
IAH9:23 amHouston George Bush Intcntl
2h 50m
ORD12:13 pmChicago O'Hare Intl
May 10
ORD5:25 amChicago O'Hare Intl
3h 07m
IAH8:32 amHouston George Bush Intcntl
$97
Frontier
Apr 25
IAH11:32 amHouston George Bush Intcntl
2h 50m
ORD2:22 pmChicago O'Hare Intl
Apr 28
ORD8:25 amChicago O'Hare Intl
3h 07m
IAH11:32 amHouston George Bush Intcntl
$98
Frontier
Apr 28
IAH12:27 pmHouston George Bush Intcntl
2h 50m
ORD3:17 pmChicago O'Hare Intl
May 1
ORD5:15 amChicago O'Hare Intl
3h 07m
IAH8:22 amHouston George Bush Intcntl
$99

momondo Fare Finder

 
Customize your flight search to find flights from Houston George Bush Intcntl Airport 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, momondo users made 832,500 searches. Data last updated March 8, 2026.
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

Cheapest round-trip

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 4/30

9:23 am-12:13 pm

Nonstop2h 50m

Chicago O'Hare Intl

Sun 5/10

5:25 am-8:32 am

Nonstop3h 07m

$97

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 4/25

11:32 am-2:22 pm

Nonstop2h 50m

Chicago O'Hare Intl

Tue 4/28

8:25 am-11:32 am

Nonstop3h 07m

$98
Quickest round-trip

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Sat 4/18

5:33 pm-8:19 pm

Nonstop2h 46m

Chicago O'Hare Intl

Tue 4/21

7:55 am-10:48 am

Nonstop2h 53m

$102

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Mon 5/18

5:33 pm-8:19 pm

Nonstop2h 46m

Chicago O'Hare Intl

Tue 5/19

7:55 am-10:48 am

Nonstop2h 53m

$108

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Sat 5/23

8:29 am-4:37 pm

1 stop8h 08m

Moline Quad-City

Sat 5/30

5:17 pm-11:54 pm

1 stop6h 37m

$223

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Sat 5/23

6:29 pm-11:55 pm

1 stop5h 26m

Moline Quad-City

Sat 5/30

6:00 am-1:17 pm

2 stops7h 17m

$228

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Sat 4/25

6:27 pm-11:54 pm

1 stop5h 27m

Moline Quad-City

Sun 4/26

6:41 pm-11:48 pm

1 stop5h 07m

$256

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Tue 6/2

5:04 am-10:10 am

1 stop5h 06m

Greater Peoria

Tue 8/11

1:21 pm-8:39 pm

1 stop7h 18m

$269

HoustonBloomington

IAH - BMI

IAHBMI

Houston George Bush Intcntl

Wed 5/6

5:24 am-11:19 am

1 stop5h 55m

Bloomington-Normal

Sat 5/9

4:14 pm-11:54 pm

1 stop7h 40m

$271

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Sat 4/4

6:15 am-12:36 pm

1 stop6h 21m

Greater Peoria

Fri 4/10

2:50 pm-8:20 pm

1 stop5h 30m

$309

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Houston George Bush Intcntl Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Houston George Bush Intcntl Airport is in September. Flight prices, which tend to average around $151, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $167.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Houston George Bush Intcntl Airport to Illinois is on a Friday when prices can be found for as low as $282. Flights from Houston George Bush Intcntl Airport to Illinois on a Sunday will generally be more expensive and average around $550. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Houston George Bush Intcntl Airport to Illinois during this time can be as low as $212. Flights at noon are often more expensive with an average ticket price of $737.

What is the cheapest Houston George Bush Intcntl to Illinois flight route?

Fly from Houston George Bush Intcntl to Chicago O'Hare Intl for the best Houston George Bush Intcntl - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Houston George Bush Intcntl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $239 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Houston George Bush Intcntl Airport for as low as $185 on momondo.

What cabin class options are available on Houston George Bush Intcntl to Illinois flights?

There are 4 cabin classes available to choose from on Houston George Bush Intcntl to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Houston George Bush Intcntl Airport to Illinois flights?

You could potentially save up to 11% on your flight if you consider stops on a Houston George Bush Intcntl Airport to Illinois flight.

Cheap Houston George Bush Intcntl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Houston George Bush Intcntl Airport to Illinois

Best Price Found

$104

Fastest flight time

2h 01m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Houston George Bush Intcntl Airport in the past 72 hours is $104. The best round-trip flight deal from Houston George Bush Intcntl Airport to Illinois found on momondo in the last 72 hours is $106.
The fastest flight from Houston George Bush Intcntl Airport to Illinois takes 2h 01m
Direct flights go from Houston George Bush Intcntl Airport to Illinois every day.
There are 98 airports in Illinois. From Houston George Bush Intcntl Airport there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • When did momondo last update prices for flights from Houston George Bush Intcntl Airport to Illinois?

    Prices for flights from Houston George Bush Intcntl Airport to Illinois refresh daily.

  • How many operators does momondo search for flights from Houston George Bush Intcntl Airport to Illinois?

  • How old do you have to be to fly from Houston George Bush Intcntl Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Houston George Bush Intcntl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Houston George Bush Intcntl Airport to Illinois?

Best airlines flying from Houston George Bush Intcntl Airport to Illinois

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $64Free CancellationRating
5.7
3,036 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $72Free CancellationRating
6.3
8,502 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $165Free CancellationRating
7.1
11,398 reviews
Search American Airlines flights
United AirlinesPriceFrom $177Free CancellationRating
7.4
9,405 reviews
Search United Airlines flights
DeltaPriceFrom $216Free CancellationRating
7.9
8,269 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Houston to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Houston.

Can I find flights from Houston to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Houston on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Houston to Illinois?

Once you have performed a search for Houston to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Houston to Illinois right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Houston to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.

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