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Cheap flights from Houston to Illinois from $29

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 10/25. 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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Cheap round-trip flights

Frontier Logo
7:23 pm - 10:05 pmIAH-ORD
2h 42mnonstop
Frontier Logo
12:47 pm - 3:47 pmORD-IAH
3h 00mnonstop
$53Frontier
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Mon, Nov 3 - Thu, Nov 6
Spirit Airlines Logo
5:02 pm - 7:42 pmIAH-ORD
2h 40mnonstop
Spirit Airlines Logo
8:47 pm - 11:29 pmORD-IAH
2h 42mnonstop
$54Spirit Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
Spirit Airlines Logo
5:05 pm - 7:50 pmIAH-ORD
2h 45mnonstop
Spirit Airlines Logo
8:56 pm - 11:45 pmORD-IAH
2h 49mnonstop
$59Spirit Airlines
Find Deal
Mon, Sep 15 - Thu, Sep 18
Frontier Logo
8:00 pm - 10:45 pmIAH-ORD
2h 45mnonstop
Frontier Logo
4:03 pm - 7:10 pmORD-IAH
3h 07mnonstop
$61Frontier
Find Deal
Thu, Oct 2 - Sun, Oct 5
Southwest Logo
8:20 pm - 10:45 pmHOU-MDW
2h 25mnonstop
Southwest Logo
6:25 am - 8:55 amMDW-HOU
2h 30mnonstop
$157Southwest
Find Deal
Sat, Aug 30 - Wed, Sep 3
Southwest Logo
1:25 pm - 3:50 pmHOU-MDW
2h 25mnonstop
Southwest Logo
6:20 pm - 9:00 pmMDW-HOU
2h 40mnonstop
$177Southwest
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Wed, Sep 3 - Fri, Sep 5
American Airlines Logo
5:05 am - 10:12 amIAH-MLI
5h 07m1 stop
American Airlines Logo
5:50 pm - 10:15 pmMLI-IAH
4h 25m1 stop
$226American Airlines
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Wed, Aug 27 - Sat, Aug 30
United Airlines Logo
7:50 am - 10:01 amIAH-STL
2h 11mnonstop
United Airlines Logo
6:15 am - 8:26 amSTL-IAH
2h 11mnonstop
$234United Airlines
Find Deal
Tue, Aug 26 - Thu, Aug 28
American Airlines Logo
4:20 pm - 11:03 pmHOU-STL
6h 43m1 stop
American Airlines Logo
5:15 am - 9:44 amSTL-HOU
4h 29m1 stop
$236American Airlines
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Thu, Aug 21 - Mon, Aug 25
United Airlines Logo
7:50 am - 10:01 amIAH-STL
2h 11mnonstop
United Airlines Logo
6:15 am - 8:26 amSTL-IAH
2h 11mnonstop
$251United Airlines
Find Deal
Fri, Aug 22 - Sun, Aug 24

Frontier flights from Houston to Illinois

Our best Frontier deals on Houston to Illinois flight tickets
Frontier
Nov 3
IAH7:23 pmHouston George Bush Intcntl
2h 42m
ORD10:05 pmChicago O'Hare Intl
Nov 6
ORD12:47 pmChicago O'Hare Intl
3h 00m
IAH3:47 pmHouston George Bush Intcntl
$53
Find similar
Frontier
Oct 2
IAH8:00 pmHouston George Bush Intcntl
2h 45m
ORD10:45 pmChicago O'Hare Intl
Oct 5
ORD4:03 pmChicago O'Hare Intl
3h 07m
IAH7:10 pmHouston George Bush Intcntl
$61
Find similar
Frontier
Oct 10
IAH7:43 pmHouston George Bush Intcntl
2h 42m
ORD10:25 pmChicago O'Hare Intl
Oct 12
ORD12:47 pmChicago O'Hare Intl
3h 00m
IAH3:47 pmHouston George Bush Intcntl
$70
Find similar

Spirit Airlines flights from Houston to Illinois

Our best Spirit Airlines deals on Houston to Illinois flight tickets
Spirit Airlines
Aug 27
IAH5:02 pmHouston George Bush Intcntl
2h 40m
ORD7:42 pmChicago O'Hare Intl
Sep 3
ORD8:47 pmChicago O'Hare Intl
2h 42m
IAH11:29 pmHouston George Bush Intcntl
$54
Find similar
Spirit Airlines
Sep 15
IAH5:05 pmHouston George Bush Intcntl
2h 45m
ORD7:50 pmChicago O'Hare Intl
Sep 18
ORD8:56 pmChicago O'Hare Intl
2h 49m
IAH11:45 pmHouston George Bush Intcntl
$59
Find similar
Spirit Airlines
Aug 27
IAH5:02 pmHouston George Bush Intcntl
2h 40m
ORD7:42 pmChicago O'Hare Intl
Aug 30
ORD8:47 pmChicago O'Hare Intl
2h 42m
IAH11:29 pmHouston George Bush Intcntl
$64
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 July 31, 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

Mon 11/3

7:23 pm-10:05 pm

Nonstop2h 42m

Chicago O'Hare Intl

Thu 11/6

12:47 pm-3:47 pm

Nonstop3h 00m

$53

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Wed 8/27

5:02 pm-7:42 pm

Nonstop2h 40m

Chicago O'Hare Intl

Wed 9/3

8:47 pm-11:29 pm

Nonstop2h 42m

$54

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Mon 9/15

5:05 pm-7:50 pm

Nonstop2h 45m

Chicago O'Hare Intl

Thu 9/18

8:56 pm-11:45 pm

Nonstop2h 49m

$59

HoustonChicago

IAH - ORD

IAHORD

Houston George Bush Intcntl

Thu 10/2

8:00 pm-10:45 pm

Nonstop2h 45m

Chicago O'Hare Intl

Sun 10/5

4:03 pm-7:10 pm

Nonstop3h 07m

$61

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Sat 8/30

8:20 pm-10:45 pm

Nonstop2h 25m

Chicago Midway

Wed 9/3

6:25 am-8:55 am

Nonstop2h 30m

$157

HoustonChicago

HOU - MDW

HOUMDW

Houston Hobby

Wed 9/3

1:25 pm-3:50 pm

Nonstop2h 25m

Chicago Midway

Fri 9/5

6:20 pm-9:00 pm

Nonstop2h 40m

$177

HoustonMoline

IAH - MLI

IAHMLI

Houston George Bush Intcntl

Wed 8/27

5:05 am-10:12 am

1 stop5h 07m

Moline Quad-City

Sat 8/30

5:50 pm-10:15 pm

1 stop4h 25m

$226

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 8/26

7:50 am-10:01 am

Nonstop2h 11m

Lambert-St Louis

Thu 8/28

6:15 am-8:26 am

Nonstop2h 11m

$234

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 8/21

4:20 pm-11:03 pm

1 stop6h 43m

Lambert-St Louis

Mon 8/25

5:15 am-9:44 am

1 stop4h 29m

$236

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 8/22

7:50 am-10:01 am

Nonstop2h 11m

Lambert-St Louis

Sun 8/24

6:15 am-8:26 am

Nonstop2h 11m

$251

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 $158, 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 $158.

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 $418. 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 $194. Flights at noon are often more expensive with an average ticket price of $759.

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 $147 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

Best Price Found

$29

Fastest flight time

1h 55m

Direct flights

Every day

Airports in Illinois

3 airports
The best one-way flight to Illinois from Houston in the past 72 hours is $29. The best round-trip flight deal from Houston to Illinois found on momondo in the last 72 hours is $53.
The fastest flight from Houston to Illinois takes 1h 55m
Direct flights go from Houston to Illinois every day.
There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), 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
Spirit AirlinesPriceFrom $64Free CancellationRating
6.3
8,048 reviews
Search Spirit Airlines flights
FrontierPriceFrom $64Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
American AirlinesPriceFrom $157Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $172Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
DeltaPriceFrom $196Free CancellationRating
8.0
7,981 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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