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Cheap flights from Houston George Bush Intcntl Airport to Illinois from $48

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 1/13. 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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0 bags

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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
10:26 am - 1:20 pm
IAH
-
ORD
2h 54mnonstop
Frontier Logo
12:01 pm - 9:13 pm
ORD
-
IAH
9h 12m1 stop
$93Frontier
Fri, Feb 20 - Mon, Feb 23
Frontier Logo
6:05 am - 11:35 am
IAH
-
ORD
5h 30m1 stop
Frontier Logo
6:30 am - 9:31 am
ORD
-
IAH
3h 01mnonstop
$94Frontier
Mon, Jan 12 - Fri, Jan 16
Spirit Airlines Logo
5:30 pm - 8:04 pm
IAH
-
ORD
2h 34mnonstop
Spirit Airlines Logo
9:09 pm - 11:59 pm
ORD
-
IAH
2h 50mnonstop
$96Spirit Airlines
Wed, Dec 31 - Tue, Jan 6
Spirit Airlines Logo
11:38 am - 2:17 pm
IAH
-
ORD
2h 39mnonstop
Spirit Airlines Logo
12:44 pm - 7:24 pm
ORD
-
IAH
6h 40m1 stop
$97Spirit Airlines
Fri, Jan 23 - Sat, Jan 24
United Airlines Logo
5:00 am - 10:12 am
IAH
-
MLI
5h 12m1 stop
United Airlines Logo
5:29 pm - 12:12 am
MLI
-
IAH
6h 43m1 stop
$239United Airlines
Tue, Jan 6 - Thu, Jan 15
Delta Logo
5:15 am - 4:26 pm
IAH
-
MLI
11h 11m2 stops
Delta Logo
5:11 pm - 11:56 pm
MLI
-
IAH
6h 45m1 stop
$244Delta
Tue, Jan 6 - Thu, Jan 15
American Airlines Logo
2:41 pm - 10:23 pm
IAH
-
MLI
7h 42m2 stops
American Airlines Logo
11:28 am - 8:15 pm
MLI
-
IAH
8h 47m2 stops
$249American Airlines
Tue, Jan 6 - Thu, Jan 15
United Airlines Logo
6:15 am - 12:36 pm
IAH
-
PIA
6h 21m1 stop
United Airlines Logo
5:25 pm - 12:30 am
PIA
-
IAH
7h 05m1 stop
$269United Airlines
Thu, May 14 - Mon, May 18
Delta Logo
9:54 am - 4:26 pm
IAH
-
MLI
6h 32m1 stop
Delta Logo
5:11 pm - 11:56 pm
MLI
-
IAH
6h 45m1 stop
$269Delta
Thu, Jan 22 - Mon, Jan 26
American Airlines Logo
9:26 am - 2:51 pm
IAH
-
MLI
5h 25m1 stop
American Airlines Logo
3:21 pm - 8:26 pm
MLI
-
IAH
5h 05m1 stop
$290American Airlines
Thu, Dec 25 - Wed, Dec 31

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
Feb 20
IAH10:26 amHouston George Bush Intcntl
2h 54m
ORD1:20 pmChicago O'Hare Intl
Feb 23
ORD12:01 pmChicago O'Hare Intl
9h 12m
1 stop
IAH9:13 pmHouston George Bush Intcntl
$93
Find similar
Frontier
Jan 12
IAH6:05 amHouston George Bush Intcntl
5h 30m
1 stop
ORD11:35 amChicago O'Hare Intl
Jan 16
ORD6:30 amChicago O'Hare Intl
3h 01m
IAH9:31 amHouston George Bush Intcntl
$94
Find similar
Frontier
Feb 27
IAH6:51 pmHouston George Bush Intcntl
2h 38m
MDW9:29 pmChicago Midway
Mar 2
MDW6:45 amChicago Midway
3h 00m
IAH9:45 amHouston George Bush Intcntl
$95
Find similar

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
Dec 31
IAH5:30 pmHouston George Bush Intcntl
2h 34m
ORD8:04 pmChicago O'Hare Intl
Jan 6
ORD9:09 pmChicago O'Hare Intl
2h 50m
IAH11:59 pmHouston George Bush Intcntl
$96
Find similar
Spirit Airlines
Jan 23
IAH11:38 amHouston George Bush Intcntl
2h 39m
ORD2:17 pmChicago O'Hare Intl
Jan 24
ORD12:44 pmChicago O'Hare Intl
6h 40m
1 stop
IAH7:24 pmHouston George Bush Intcntl
$97
Find similar
Spirit Airlines
Jan 7
IAH5:30 pmHouston George Bush Intcntl
2h 34m
ORD8:04 pmChicago O'Hare Intl
Jan 9
ORD9:23 amChicago O'Hare Intl
13h 33m
1 stop
IAH10:56 pmHouston George Bush Intcntl
$99
Find similar

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 December 15, 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

Fly to

Route

Depart

Return

Price

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 2/20

10:26 am-1:20 pm

Nonstop2h 54m

Chicago O'Hare Intl

Mon 2/23

12:01 pm-9:13 pm

1 stop9h 12m

$93

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Mon 1/12

6:05 am-11:35 am

1 stop5h 30m

Chicago O'Hare Intl

Fri 1/16

6:30 am-9:31 am

Nonstop3h 01m

$94

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 12/31

5:30 pm-8:04 pm

Nonstop2h 34m

Chicago O'Hare Intl

Tue 1/6

9:09 pm-11:59 pm

Nonstop2h 50m

$96

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 1/23

11:38 am-2:17 pm

Nonstop2h 39m

Chicago O'Hare Intl

Sat 1/24

12:44 pm-7:24 pm

1 stop6h 40m

$97

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Tue 1/6

5:00 am-10:12 am

1 stop5h 12m

Moline Quad-City

Thu 1/15

5:29 pm-12:12 am

1 stop6h 43m

$239

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Tue 1/6

5:15 am-4:26 pm

2 stops11h 11m

Moline Quad-City

Thu 1/15

5:11 pm-11:56 pm

1 stop6h 45m

$244

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Tue 1/6

2:41 pm-10:23 pm

2 stops7h 42m

Moline Quad-City

Thu 1/15

11:28 am-8:15 pm

2 stops8h 47m

$249

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Thu 5/14

6:15 am-12:36 pm

1 stop6h 21m

Greater Peoria

Mon 5/18

5:25 pm-12:30 am

1 stop7h 05m

$269

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Thu 1/22

9:54 am-4:26 pm

1 stop6h 32m

Moline Quad-City

Mon 1/26

5:11 pm-11:56 pm

1 stop6h 45m

$269

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Thu 12/25

9:26 am-2:51 pm

1 stop5h 25m

Moline Quad-City

Wed 12/31

3:21 pm-8:26 pm

1 stop5h 05m

$290

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 March. Flight prices, which tend to average around $136, 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 March, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $144.

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 $286. Flights from Houston George Bush Intcntl Airport to Illinois on a Sunday will generally be more expensive and average around $639. 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 $205. Flights at noon are often more expensive with an average ticket price of $789.

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

Fly from Houston George Bush Intcntl to Chicago Midway 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 $224 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 $163 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?

No. A direct flight is the cheapest option for a flight between Houston George Bush Intcntl Airport to Illinois.

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

$105

Fastest flight time

2h 02m

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 $105. The best round-trip flight deal from Houston George Bush Intcntl Airport to Illinois found on momondo in the last 72 hours is $143.
The fastest flight from Houston George Bush Intcntl Airport to Illinois takes 2h 02m
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 Chicago Midway (MDW), 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 $76Free CancellationRating
5.8
3,080 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $82Free CancellationRating
6.3
8,185 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $157Free CancellationRating
7.2
11,052 reviews
Search American Airlines flights
United AirlinesPriceFrom $172Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
DeltaPriceFrom $216Free CancellationRating
7.9
8,008 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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