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Cheap flights from Houston to Illinois from $55

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 to Illinois departing on 11/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Houston to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
10:22 am - 1:13 pmIAH-ORD
2h 51mnonstop
Frontier Logo
6:30 am - 9:27 amORD-IAH
2h 57mnonstop
$98Frontier
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Fri, Nov 21 - Mon, Nov 24
Frontier Logo
10:04 am - 12:37 pmIAH-MDW
2h 33mnonstop
Frontier Logo
9:27 am - 9:33 amMDW-IAH
24h 06m1 stop
$98Frontier
Find Deal
Thu, Nov 13 - Mon, Nov 17
Spirit Airlines Logo
12:10 pm - 2:48 pmIAH-ORD
2h 38mnonstop
Spirit Airlines Logo
3:26 pm - 12:57 amORD-IAH
9h 31m1 stop
$101Spirit Airlines
Find Deal
Tue, Dec 2 - Sat, Dec 6
Spirit Airlines Logo
10:41 am - 8:01 pmIAH-ORD
9h 20m1 stop
Spirit Airlines Logo
7:35 am - 10:20 amORD-IAH
2h 45mnonstop
$102Spirit Airlines
Find Deal
Wed, Dec 10 - Sat, Jan 10
Southwest Logo
2:15 pm - 4:40 pmHOU-MDW
2h 25mnonstop
Southwest Logo
5:55 am - 8:50 amMDW-HOU
2h 55mnonstop
$117Southwest
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Thu, Jan 22 - Sun, Jan 25
Southwest Logo
7:45 pm - 10:10 pmHOU-MDW
2h 25mnonstop
Southwest Logo
7:00 am - 9:40 amMDW-HOU
2h 40mnonstop
$157Southwest
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
10:16 am - 6:30 pmHOU-ORD
8h 14m1 stop
American Airlines Logo
1:15 pm - 7:54 pmORD-HOU
6h 39m1 stop
$241American Airlines
Find Deal
Sat, Feb 21 - Tue, Feb 24
American Airlines Logo
6:00 am - 10:11 amIAH-PIA
4h 11m1 stop
American Airlines Logo
5:15 pm - 12:09 amPIA-IAH
6h 54m1 stop
$249American Airlines
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Thu, Dec 4 - Tue, Dec 9
United Airlines Logo
9:35 am - 2:33 pmIAH-PIA
4h 58m1 stop
United Airlines Logo
1:20 pm - 8:50 pmPIA-IAH
7h 30m1 stop
$279United Airlines
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Sat, Nov 15 - Sun, Nov 16
United Airlines Logo
9:43 pm - 8:48 amIAH-DEC
11h 05m1 stop
United Airlines Logo
7:09 pm - 12:30 amDEC-IAH
5h 21m1 stop
$355United Airlines
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Wed, Dec 10 - Sun, Jan 4

Frontier flights from Houston to Illinois

Our best Frontier deals on Houston to Illinois flight tickets
Frontier
Nov 21
IAH10:22 amHouston George Bush Intcntl
2h 51m
ORD1:13 pmChicago O'Hare Intl
Nov 24
ORD6:30 amChicago O'Hare Intl
2h 57m
IAH9:27 amHouston George Bush Intcntl
$98
Find similar
Frontier
Dec 3
IAH7:59 amHouston George Bush Intcntl
6h 32m
1 stop
ORD2:31 pmChicago O'Hare Intl
Dec 7
ORD3:47 pmChicago O'Hare Intl
3h 09m
IAH6:56 pmHouston George Bush Intcntl
$99
Find similar
Frontier
Nov 20
IAH7:45 pmHouston George Bush Intcntl
2h 32m
MDW10:17 pmChicago Midway
Nov 24
MDW4:00 pmChicago Midway
3h 00m
IAH7:00 pmHouston George Bush Intcntl
$103
Find similar

Spirit Airlines flights from Houston to Illinois

Our best Spirit Airlines deals on Houston to Illinois flight tickets
Spirit Airlines
Dec 2
IAH12:10 pmHouston George Bush Intcntl
2h 38m
ORD2:48 pmChicago O'Hare Intl
Dec 6
ORD3:26 pmChicago O'Hare Intl
9h 31m
1 stop
IAH12:57 amHouston George Bush Intcntl
$101
Find similar
Spirit Airlines
Dec 10
IAH10:41 amHouston George Bush Intcntl
9h 20m
1 stop
ORD8:01 pmChicago O'Hare Intl
Jan 10
ORD7:35 amChicago O'Hare Intl
2h 45m
IAH10:20 amHouston George Bush Intcntl
$102
Find similar
Spirit Airlines
Nov 20
IAH12:10 pmHouston George Bush Intcntl
2h 38m
ORD2:48 pmChicago O'Hare Intl
Dec 2
ORD8:20 amChicago O'Hare Intl
2h 50m
IAH11:10 amHouston George Bush Intcntl
$103
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Houston 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 November 3, 2025.
Use the filters below to find and compare flights from Houston to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Fri 11/21

10:22 am-1:13 pm

Nonstop2h 51m

Chicago O'Hare Intl

Mon 11/24

6:30 am-9:27 am

Nonstop2h 57m

$98

HoustonChicago

IAH - MDW

IAHMDW

Houston George Bush Intcntl

Thu 11/13

10:04 am-12:37 pm

Nonstop2h 33m

Chicago Midway

Mon 11/17

9:27 am-9:33 am

1 stop24h 06m

$98

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Tue 12/2

12:10 pm-2:48 pm

Nonstop2h 38m

Chicago O'Hare Intl

Sat 12/6

3:26 pm-12:57 am

1 stop9h 31m

$101

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 12/10

10:41 am-8:01 pm

1 stop9h 20m

Chicago O'Hare Intl

Sat 1/10

7:35 am-10:20 am

Nonstop2h 45m

$102

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Thu 1/22

2:15 pm-4:40 pm

Nonstop2h 25m

Chicago Midway

Sun 1/25

5:55 am-8:50 am

Nonstop2h 55m

$117

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Wed 12/3

7:45 pm-10:10 pm

Nonstop2h 25m

Chicago Midway

Wed 12/10

7:00 am-9:40 am

Nonstop2h 40m

$157

HoustonChicago

HOU - ORD

HOUORD

Houston Hobby

Sat 2/21

10:16 am-6:30 pm

1 stop8h 14m

Chicago O'Hare Intl

Tue 2/24

1:15 pm-7:54 pm

1 stop6h 39m

$241

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Thu 12/4

6:00 am-10:11 am

1 stop4h 11m

Greater Peoria

Tue 12/9

5:15 pm-12:09 am

1 stop6h 54m

$249

HoustonPeoria

IAH - PIA

IAHPIA

Houston George Bush Intcntl

Sat 11/15

9:35 am-2:33 pm

1 stop4h 58m

Greater Peoria

Sun 11/16

1:20 pm-8:50 pm

1 stop7h 30m

$279

HoustonDecatur

IAH - DEC

IAHDEC

Houston George Bush Intcntl

Wed 12/10

9:43 pm-8:48 am

1 stop11h 05m

Decatur Arpt

Sun 1/4

7:09 pm-12:30 am

1 stop5h 21m

$355

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 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 is in February. Flight prices, which tend to average around $177, 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 February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $182.

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

The cheapest day to depart from Houston to Illinois is on a Wednesday when prices can be found for as low as $268. Flights from Houston to Illinois on a Sunday will generally be more expensive and average around $387. 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 to Illinois during this time can be as low as $208. Flights at noon are often more expensive with an average ticket price of $791.

What is the cheapest Houston to Illinois flight route?

Fly from Houston George Bush Intcntl to Chicago Midway for the best Houston - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $223 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Houston for as low as $178 on momondo.

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

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

Cheap Houston to Illinois flight deals and tips

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

Fastest flight time

1h 55m

Direct flights

Every day

Airports in Illinois

1 airport
The fastest flight from Houston to Illinois takes 1h 55m
Direct flights go from Houston to Illinois every day.
There is 1 airport near Illinois: Lambert-St Louis (STL)
Search flight deals

  • When did momondo last update prices for flights from Houston to Illinois?

    Prices for flights from Houston to Illinois are updated daily.

  • How many operators does momondo search for flights from Houston to Illinois?

  • How old do you have to be to fly from Houston to Illinois?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston to Illinois.

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

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Houston to Illinois

Compare and see reviews for airlines that fly from Houston to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $75Free CancellationRating
5.8
3,117 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $77Free CancellationRating
6.3
8,114 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $165Free CancellationRating
7.2
11,036 reviews
Search American Airlines flights
SouthwestPriceFrom $171Free CancellationRating
8.0
4,238 reviews
Search Southwest flights
United AirlinesPriceFrom $177Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
DeltaPriceFrom $216Free CancellationRating
7.9
8,001 reviews
Search Delta flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Houston to Illinois. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Illinois from Houston which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Houston.

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

Yes momondo offers price alerts on flights to Illinois from Houston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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