HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
George Bush Intcntl

$62+ Cheap flights from St. Louis (STL) to George Bush Intcntl (IAH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAH
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to George Bush Intcntl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Lambert-St Louis to Houston George Bush Intcntl are usually found in August or May, booked 28 days in advance, depart on a Wednesday or Friday and return on a Saturday

Cheap flight deals from St. Louis to George Bush Intcntl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to George Bush Intcntl (IAH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$192
(Mytrip)

One-way from

$62
(United Airlines)

Popular in

September

Cheapest in

August

Average price

$341

Good round-trip deal

$448 or less

Good one-way deal

$226 or less
From Lambert-St Louis to Houston George Bush Intcntl
Search Deals
One-way flight from Lambert-St Louis to Houston George Bush Intcntl
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Houston George Bush Intcntl.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Houston George Bush Intcntl.
Search Deals

Find flight deals from St. Louis to George Bush Intcntl

Cheapest flights from St. Louis to George Bush Intcntl
Explore the most affordable flight options available from St. Louis to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:54 amSTL - IAH
1 stop11h 48mSpirit Airlines
Mon 11/38:31 pmIAH - STL
1 stop13h 28mSpirit Airlines
Deal found 8/12$192
This Gotogate deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:54 pmSTL - IAH
1 stop27h 42mFrontier
Mon 8/256:05 amIAH - STL
1 stop6h 51mFrontier
Deal found 8/13$193
This Booking.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:54 pmSTL - IAH
1 stop14h 45mFrontier
Fri 8/226:05 amIAH - STL
1 stop6h 51mFrontier
Deal found 8/13$195
This Priceline deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:52 pmSTL - IAH
1 stop8h 04mFrontier
Sat 8/237:10 amIAH - STL
1 stop6h 23mFrontier
Deal found 8/14$197
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/811:05 amSTL - IAH
Nonstop2h 18mUnited Airlines
Wed 9/104:50 pmIAH - STL
Nonstop2h 08mUnited Airlines
Deal found 8/14$203
This FlightHub deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/84:00 pmSTL - IAH
1 stop5h 53mMultiple Airlines
Wed 9/107:31 pmIAH - STL
1 stop14h 09mMultiple Airlines
Deal found 8/12$205
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:26 pmSTL - IAH
1 stop6h 34mDelta
Wed 9/105:31 amIAH - STL
1 stop7h 00mDelta
Deal found 8/14$209
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/303:02 pmSTL - IAH
1 stop7h 18mMultiple Airlines
Wed 9/312:41 pmIAH - STL
1 stop20h 59mMultiple Airlines
Deal found 8/12$210
This Mytrip deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/233:02 pmSTL - IAH
1 stop7h 54mFrontier
Tue 8/263:27 pmIAH - STL
1 stop17h 44mFrontier
Deal found 8/12$211
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/184:00 pmSTL - IAH
1 stop5h 52mFrontier
Sun 9/216:05 amIAH - STL
1 stop8h 59mFrontier
Deal found 8/12$212
This Frontier deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:00 pmSTL - IAH
1 stop5h 52mFrontier
Mon 9/89:08 pmIAH - STL
1 stop11h 58mFrontier
Deal found 8/13$213
This FlightHub deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:54 pmSTL - IAH
1 stop27h 42mFrontier
Sat 8/237:10 amIAH - STL
1 stop6h 23mFrontier
Deal found 8/13$214

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to George Bush Intcntl 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, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from St. Louis to Houston George Bush Intcntl Airport that are best for you.

Fly from

St. Louis

Fly to

George Bush Intcntl

Route

Depart

Return

Price

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 10/28

10:54 am-10:42 pm

1 stop11h 48m

Houston George Bush Intcntl

Mon 11/3

8:31 pm-9:59 am

1 stop13h 28m

$192

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 8/23

3:02 pm-10:56 pm

1 stop7h 54m

Houston George Bush Intcntl

Tue 8/26

3:27 pm-9:11 am

1 stop17h 44m

$193

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 9/9

4:32 pm-6:50 pm

Nonstop2h 18m

Houston George Bush Intcntl

Tue 9/16

4:50 pm-6:58 pm

Nonstop2h 08m

$193

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 8/20

7:54 pm-11:36 pm

1 stop27h 42m

Houston George Bush Intcntl

Mon 8/25

6:05 am-12:56 pm

1 stop6h 51m

$193

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 8/20

7:54 pm-10:39 am

1 stop14h 45m

Houston George Bush Intcntl

Fri 8/22

6:05 am-12:56 pm

1 stop6h 51m

$195

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Mon 8/25

2:01 pm-10:26 pm

1 stop8h 25m

Houston George Bush Intcntl

Thu 9/11

6:05 am-3:04 pm

1 stop8h 59m

$195

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 9/12

5:11 pm-11:50 pm

1 stop6h 39m

Houston George Bush Intcntl

Mon 9/15

5:32 pm-11:24 pm

1 stop5h 52m

$197

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Mon 9/8

3:30 pm-11:14 pm

1 stop7h 44m

Houston George Bush Intcntl

Wed 9/10

5:31 am-12:31 pm

1 stop7h 00m

$197

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 9/9

7:00 am-12:02 pm

1 stop5h 02m

Houston George Bush Intcntl

Wed 9/10

5:41 pm-11:23 pm

1 stop5h 42m

$197

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Mon 9/15

6:15 am-8:26 am

Nonstop2h 11m

Houston George Bush Intcntl

Wed 9/17

4:50 pm-6:58 pm

Nonstop2h 08m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 23 results
1
2
3

The best insider tips for St. Louis to Houston George Bush Intcntl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Houston George Bush Intcntl Airport trip
Airports
STL

Expect security screening at STL to take 5-10 minutes during off-peak times. Check real-time wait times online before heading to the airport.

Read more about STLby Taryn White
IAH

For a quick ride to downtown Houston, Uber or Lyft is recommended from IAH, taking around 25 minutes by car.

Read more about IAHby Evie Carrick
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick

Evie Carrick

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more

Best time to book a flight from St. Louis to George Bush Intcntl

Have a flexible travel schedule? Discover the best time to fly to George Bush Intcntl from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Houston George Bush Intcntl Airport

How far ahead should I book a flight from St. Louis to Houston George Bush Intcntl Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to George Bush Intcntl. Price data was last updated on August 8, 2025.

The best time to book flights from St. Louis to Houston George Bush Intcntl Airport is 28 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Houston George Bush Intcntl Airport?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Houston George Bush Intcntl Airport (average of $241). Flying from St. Louis to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to IAH?

Find hourly flight availability from St. Louis to George Bush Intcntl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 62% on flights from St. Louis to Houston George Bush Intcntl Airport by exploring options for tickets in the evening.

Reviews of airlines servicing George Bush Intcntl

Get insights into the airlines that provide service to George Bush Intcntl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to George Bush Intcntl. Reviews last updated August 14, 2025.
Get a feel of what it's like to fly with United Airlines, American Airlines, and Frontier from St. Louis to Houston George Bush Intcntl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Frontier
5.8
Fair
3,217 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from St. Louis to George Bush Intcntl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Houston George Bush Intcntl?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Houston George Bush Intcntl. You should not have trouble finding flights to Houston George Bush Intcntl from Lambert-St Louis; the airport handles an average of 9 outbound flights to Houston George Bush Intcntl per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the St. Louis airport to Houston George Bush Intcntl. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • What are the cheapest airlines flying from St. Louis to Houston George Bush Intcntl Airport round-trip?

    Our cheapest airline available from St. Louis to Houston George Bush Intcntl Airport is Frontier. Our recent data shows that you can find tickets from as low as $107 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $196 and $237 round-trip. Frontier is priced at 72% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from St. Louis to Houston George Bush Intcntl Airport?

    Before booking your flight to Houston George Bush Intcntl Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: CommutAir (100%), ANA (84%), Copa Airlines( 80%).

  • What are the cheapest flights from St. Louis to Houston George Bush Intcntl Airport?

    Looking for the cheapest flight from St. Louis to Houston George Bush Intcntl Airport? While on average our users pay $497, our data indicates the cheapest price to be $143. The most popular route (Lambert-St Louis - Houston George Bush Intcntl), is priced around $157.

  • Can I find deals for flights from St. Louis to George Bush Intcntl that include hotel bookings?

    Yes. In addition to deals on St. Louis to George Bush Intcntl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to George Bush Intcntl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to George Bush Intcntl.

  • Can I find deals for business class flights from St. Louis to George Bush Intcntl?

    Yes. Cheapflights offers flight deals from St. Louis to George Bush Intcntl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Houston George Bush Intcntl Airport?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Houston George Bush Intcntl Airport (average of $241). Flying from St. Louis to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Houston George Bush Intcntl Airport?

Book flights to Houston George Bush Intcntl Airport if you plan to visit one of these locations
Montgomery
Spring
Humble
The Woodlands
Conroe
Tomball
Katy
Jersey Village
Cypress

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from St. Louis to George Bush Intcntl

Discover the top 3 airlines that operate flights from St. Louis to George Bush Intcntl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$107Average$159FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$196Average$396FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$237Average$419FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.