How does KAYAK find such low prices on flights from Illinois to Houston?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Houston.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Houston?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Houston from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Houston?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Houston with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Houston?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Houston from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$49 CHEAP FLIGHTS from Illinois to Houston

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from Illinois to Houston

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Houston

Thu, Nov 12 - Sun, Nov 15

1:06 pm - 4:11 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 05mnonstop

5:06 pm - 7:59 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

2h 53mnonstop

$126Frontier

Wed, Oct 28 - Thu, Oct 29

2:11 pm - 5:21 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 10mnonstop

5:06 pm - 7:59 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

2h 53mnonstop

$126Frontier

Tue, Dec 8 - Tue, Dec 15

6:40 am - 9:20 amMDW Chicago Midway-HOU Houston Hobby

2h 40mnonstop

7:20 am - 9:50 amHOU Houston Hobby-MDW Chicago Midway

2h 30mnonstop

$210Southwest

Tue, Nov 10 - Wed, Nov 18

6:40 am - 9:20 amMDW Chicago Midway-HOU Houston Hobby

2h 40mnonstop

7:20 am - 9:50 amHOU Houston Hobby-MDW Chicago Midway

2h 30mnonstop

$210Southwest

Thu, Jan 7 - Mon, Jan 11

6:15 am - 8:37 amSTL Lambert-St Louis-IAH Houston George Bush Intcntl

2h 22mnonstop

8:07 pm - 10:13 pmIAH Houston George Bush Intcntl-STL Lambert-St Louis

2h 06mnonstop

$217United Airlines

Thu, Oct 22 - Sat, Oct 24

6:15 am - 8:27 amSTL Lambert-St Louis-IAH Houston George Bush Intcntl

2h 12mnonstop

6:05 pm - 8:16 pmIAH Houston George Bush Intcntl-STL Lambert-St Louis

2h 11mnonstop

$217United Airlines

Wed, Oct 14 - Wed, Oct 21

6:30 am - 2:07 pmORD Chicago O'Hare Intl-HOU Houston Hobby

7h 37m1 stop Atlanta Hartsfield-Jackson

3:09 pm - 8:38 pmHOU Houston Hobby-ORD Chicago O'Hare Intl

5h 29m1 stop Atlanta Hartsfield-Jackson

$229Delta

Sat, Oct 10 - Sat, Oct 24

3:15 pm - 11:03 pmORD Chicago O'Hare Intl-HOU Houston Hobby

7h 48m1 stop Atlanta Hartsfield-Jackson

5:28 pm - 11:57 pmHOU Houston Hobby-ORD Chicago O'Hare Intl

6h 29m1 stop Atlanta Hartsfield-Jackson

$229Delta

Sat, Oct 3 - Sat, Oct 10

5:43 am - 11:01 amSTL Lambert-St Louis-HOU Houston Hobby

5h 18m1 stop Dallas/Fort Worth

6:00 am - 12:02 pmHOU Houston Hobby-STL Lambert-St Louis

6h 02m1 stop Dallas/Fort Worth

$237American Airlines

Sat, Oct 31 - Sat, Nov 7

11:31 am - 4:43 pmSTL Lambert-St Louis-IAH Houston George Bush Intcntl

5h 12m1 stop Chicago O'Hare Intl

12:13 pm - 5:54 pmIAH Houston George Bush Intcntl-STL Lambert-St Louis

5h 41m1 stop Dallas/Fort Worth

$237American Airlines

Recent last minute flight deals from Illinois to Houston

Thu, Sep 17 - Mon, Sep 21

2:46 pm - 5:55 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 09mnonstop

12:08 pm - 6:23 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

6h 15m1 stop Atlanta Hartsfield-Jackson

$145Frontier

Thu, Sep 17 - Fri, Sep 18

2:46 pm - 5:55 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 09mnonstop

12:08 pm - 6:23 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

6h 15m1 stop Atlanta Hartsfield-Jackson

$192Frontier

Thu, Sep 17 - Fri, Sep 18

8:15 am - 1:25 pmORD Chicago O'Hare Intl-HOU Houston Hobby

5h 10m1 stop Dallas/Fort Worth

6:19 pm - 11:30 pmHOU Houston Hobby-ORD Chicago O'Hare Intl

5h 11m1 stop Dallas/Fort Worth

$348American Airlines

Wed, Sep 16 - Sat, Sep 19

5:16 pm - 10:39 pmMLI Moline Quad-City-HOU Houston Hobby

5h 23m1 stop Atlanta Hartsfield-Jackson

5:26 pm - 10:30 pmHOU Houston Hobby-MLI Moline Quad-City

5h 04m1 stop Atlanta Hartsfield-Jackson

$367Delta

Sat, Sep 19 - Mon, Sep 21

6:00 am - 1:18 pmMLI Moline Quad-City-IAH Houston George Bush Intcntl

7h 18m1 stop Chicago O'Hare Intl

6:00 am - 11:38 amIAH Houston George Bush Intcntl-MLI Moline Quad-City

5h 38m1 stop Dallas/Fort Worth

$388American Airlines

Sat, Sep 19 - Mon, Sep 21

5:16 pm - 10:39 pmMLI Moline Quad-City-HOU Houston Hobby

5h 23m1 stop Atlanta Hartsfield-Jackson

2:25 pm - 10:30 pmHOU Houston Hobby-MLI Moline Quad-City

8h 05m1 stop Atlanta Hartsfield-Jackson

$388Delta

Thu, Sep 17 - Sun, Sep 20

7:11 am - 3:17 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

8h 06m1 stop Fort Lauderdale

6:25 am - 7:13 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

12h 48m2 stops Denver Intl Minneapolis St Paul

$441Multiple Airlines

Sat, Sep 19 - Sat, Sep 19

7:25 am - 10:30 amORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 05mnonstop

9:04 pm - 7:13 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

22h 09m2 stops Atlanta Hartsfield-Jackson Minneapolis St Paul

$454Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

8:25 pm - 10:55 pmMDW Chicago Midway-HOU Houston Hobby

2h 30mnonstop

8:50 pm - 11:15 pmHOU Houston Hobby-MDW Chicago Midway

2h 25mnonstop

$497Southwest

Wed, Sep 16 - Wed, Sep 23

7:50 am - 10:25 amMDW Chicago Midway-HOU Houston Hobby

2h 35mnonstop

11:25 am - 3:30 pmHOU Houston Hobby-MDW Chicago Midway

4h 05m1 stop New Orleans Louis Armstrong

$503Southwest

Recent direct flight deals from Illinois to Houston

Thu, Nov 12 - Sun, Nov 15

1:06 pm - 4:11 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 05mnonstop

5:06 pm - 7:59 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

2h 53mnonstop

$126Frontier

Wed, Oct 28 - Thu, Oct 29

2:11 pm - 5:21 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 10mnonstop

5:06 pm - 7:59 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

2h 53mnonstop

$126Frontier

Thu, Oct 1 - Fri, Oct 2

2:46 pm - 5:55 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

3h 09mnonstop

6:50 pm - 9:39 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

2h 49mnonstop

$127Frontier

Tue, Dec 8 - Tue, Dec 15

6:40 am - 9:20 amMDW Chicago Midway-HOU Houston Hobby

2h 40mnonstop

7:20 am - 9:50 amHOU Houston Hobby-MDW Chicago Midway

2h 30mnonstop

$210Southwest

Tue, Nov 10 - Wed, Nov 18

6:40 am - 9:20 amMDW Chicago Midway-HOU Houston Hobby

2h 40mnonstop

7:20 am - 9:50 amHOU Houston Hobby-MDW Chicago Midway

2h 30mnonstop

$210Southwest

Thu, Jan 7 - Mon, Jan 11

6:15 am - 8:37 amSTL Lambert-St Louis-IAH Houston George Bush Intcntl

2h 22mnonstop

8:07 pm - 10:13 pmIAH Houston George Bush Intcntl-STL Lambert-St Louis

2h 06mnonstop

$217United Airlines

Thu, Oct 22 - Sat, Oct 24

6:15 am - 8:27 amSTL Lambert-St Louis-IAH Houston George Bush Intcntl

2h 12mnonstop

6:05 pm - 8:16 pmIAH Houston George Bush Intcntl-STL Lambert-St Louis

2h 11mnonstop

$217United Airlines

Thu, Oct 22 - Thu, Oct 22

5:05 am - 7:10 amSTL Lambert-St Louis-HOU Houston Hobby

2h 05mnonstop

8:25 pm - 10:30 pmHOU Houston Hobby-STL Lambert-St Louis

2h 05mnonstop

$217Southwest

Sat, Dec 12 - Mon, Dec 21

5:10 pm - 8:09 pmORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

2h 59mnonstop

3:18 pm - 6:16 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

2h 58mnonstop

$283American Airlines

Sat, Oct 3 - Sat, Oct 3

6:53 am - 9:40 amORD Chicago O'Hare Intl-IAH Houston George Bush Intcntl

2h 47mnonstop

2:08 pm - 5:08 pmIAH Houston George Bush Intcntl-ORD Chicago O'Hare Intl

3h 00mnonstop

$283American Airlines

Useful Info

Cheapest flight	$49

Flight from St. Louis to Houston George Bush Airport

How does KAYAK find such low prices on flights from Illinois to Houston?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Houston.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Houston?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Houston from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Houston?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Houston with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Houston?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Houston from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.