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George Bush Intcntl

$70+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAH
Apr 27 — May 41
Mon 4/27
Mon 5/4
1 adult, Economy
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Find cheap flights from St. Louis to George Bush Intcntl with Cheapflights

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Cheapflights Tip: The best prices from Lambert-St Louis to Houston George Bush Intcntl are usually found in January or August, booked 57 days in advance, depart on a Friday or Tuesday and return on a Wednesday

Cheap 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 March 28, 2026.

This Booking.com deal was found by Cheapflights users on 3/22. 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.
Sun 4/2611:44 am
STL
-
IAH
1 stop5h 34m
Frontier
Sun 4/268:06 pm
IAH
-
STL
1 stop27h 13m
Frontier
Deal found 3/22$278
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 4/96:29 pm
STL
-
IAH
1 stop14h 22m
Multiple Airlines
Sat 4/114:30 pm
IAH
-
STL
1 stop6h 55m
Multiple Airlines
Deal found 3/25$280
This CheapOair deal was found by Cheapflights users on 3/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:08 pm
STL
-
IAH
1 stop14h 34m
Frontier
Sun 8/95:34 pm
IAH
-
STL
1 stop25h 49m
Frontier
Deal found 3/25$281
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/1611:25 am
STL
-
IAH
1 stop5h 54m
Frontier
Sun 4/191:58 pm
IAH
-
STL
2 stops16h 52m
Frontier
Deal found 3/26$282
This Kiwi.com deal was found by Cheapflights users on 3/23. 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 5/73:33 pm
STL
-
IAH
2 stops17h 17m
Frontier
Sun 5/106:00 am
IAH
-
STL
1 stop26h 55m
Frontier
Deal found 3/23$283
This Mytrip deal was found by Cheapflights users on 3/27. 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.
Fri 3/274:51 pm
STL
-
IAH
1 stop14h 38m
Frontier
Sun 3/298:56 pm
IAH
-
STL
1 stop14h 23m
Frontier
Deal found 3/27$285
This Kiwi.com deal was found by Cheapflights users on 3/26. 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.
Fri 4/178:06 pm
STL
-
IAH
1 stop15h 36m
Multiple Airlines
Mon 4/201:58 pm
IAH
-
STL
1 stop9h 21m
Multiple Airlines
Deal found 3/26$287
This Kiwi.com deal was found by Cheapflights users on 3/22. 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.
Fri 5/17:01 pm
STL
-
IAH
2 stops16h 41m
Frontier
Sun 5/39:34 am
IAH
-
STL
1 stop9h 47m
Frontier
Deal found 3/22$288
This Kiwi.com deal was found by Cheapflights users on 3/24. 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.
Fri 4/34:54 pm
STL
-
IAH
2 stops14h 35m
Frontier
Tue 4/712:46 pm
IAH
-
STL
1 stop10h 39m
Frontier
Deal found 3/24$289
This Frontier deal was found by Cheapflights users on 3/25. 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.
Mon 4/612:17 pm
STL
-
IAH
1 stop8h 57m
Frontier
Thu 4/166:45 am
IAH
-
STL
1 stop12h 36m
Frontier
Deal found 3/25$290
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/104:59 pm
STL
-
IAH
1 stop14h 03m
Frontier
Sat 4/119:17 pm
IAH
-
STL
1 stop15h 02m
Frontier
Deal found 3/27$291

Find 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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$280
(Kiwi.com)

One-way from

$70
(Frontier)

Popular in

February

Cheapest in

January

Average price

$414

Good round-trip deal

$366 or less

Good one-way deal

$197 or less
Provider with most accurate pricing for Lambert-St Louis-Houston George Bush Intcntl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Houston George Bush Intcntl flights.
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From Lambert-St Louis to Houston George Bush Intcntl
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One-way flight from Lambert-St Louis to Houston George Bush Intcntl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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

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 March 28, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 4/22

6:00 am-8:19 am

Nonstop2h 19m

Houston George Bush Intcntl

Sun 4/26

7:20 am-9:25 am

Nonstop2h 05m

$323

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 4/16

10:09 am-12:33 pm

Nonstop2h 24m

Houston George Bush Intcntl

Tue 4/28

8:20 pm-10:28 pm

Nonstop2h 08m

$334

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 5/9

6:00 am-8:18 am

Nonstop2h 18m

Houston George Bush Intcntl

Tue 5/12

8:23 pm-10:30 pm

Nonstop2h 07m

$354

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 4/30

10:14 am-12:39 pm

Nonstop2h 25m

Houston George Bush Intcntl

Sat 5/2

7:25 am-9:30 am

Nonstop2h 05m

$371

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 4/25

6:00 am-8:18 am

Nonstop2h 18m

Houston George Bush Intcntl

Sun 4/26

5:00 am-10:45 am

1 stop5h 45m

$374

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 5/14

6:00 am-8:18 am

Nonstop2h 18m

Houston George Bush Intcntl

Mon 5/18

8:23 pm-10:30 pm

Nonstop2h 07m

$397

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 5/9

6:00 am-8:18 am

Nonstop2h 18m

Houston George Bush Intcntl

Mon 5/11

8:23 pm-10:30 pm

Nonstop2h 07m

$415

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 4/22

7:45 am-1:38 pm

1 stop5h 53m

Houston George Bush Intcntl

Fri 4/24

7:20 am-9:25 am

Nonstop2h 05m

$436

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 4/8

6:00 am-8:19 am

Nonstop2h 19m

Houston George Bush Intcntl

Tue 4/14

8:20 pm-10:28 pm

Nonstop2h 08m

$437

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 4/23

10:09 am-12:33 pm

Nonstop2h 24m

Houston George Bush Intcntl

Sun 4/26

8:20 pm-10:28 pm

Nonstop2h 08m

$446

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to George Bush Intcntl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to George Bush Intcntl in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Houston George Bush Intcntl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Houston George Bush Intcntl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Houston George Bush Intcntl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Houston George Bush Intcntl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Houston George Bush Intcntl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 March 13, 2026.

The best time to book flights from St. Louis to Houston George Bush Intcntl Airport is 57 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 $123). Flying from St. Louis to Houston George Bush Intcntl Airport in February is currently the most expensive (average of $291). 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 March 28, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Houston George Bush Intcntl Airport as you normally would.

How much does it cost to fly round-trip from St. Louis to Houston George Bush Intcntl Airport?

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Houston George Bush Intcntl Airport trip
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

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 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

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 March 28, 2026.
Get a feel of what it's like to fly with United Airlines,American Airlines, andFrontier 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
9,500 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
United Airlines
7.4
Good
9,500 reviews
United Airlines
7.4
Good
9,500 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
American Airlines
7.1
Good
11,514 reviews
United Airlines
7.4
Good
9,500 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
Frontier
5.7
Fair
3,013 reviews
United Airlines
7.4
Good
9,500 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours

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 2 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.

  • How long is the flight from St. Louis to Houston George Bush Intcntl Airport?

    For as low as $323, United Airlines can have you in Houston George Bush Intcntl Airport from St. Louis in 2h 19m. The distance from St. Louis to Houston George Bush Intcntl Airport is about 668 mi. All flights are typically nonstop.

  • 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 $153 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $167 and $215 round-trip. Frontier is priced at 59% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Houston George Bush Intcntl Airport one-way?

    $61 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $152 and $179, respectively.

  • 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: Copa Airlines (86%), Mesa Airlines (85%), Virgin Australia( 84%).

  • 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 $478, our data indicates the cheapest price to be $138. The most popular route (Lambert-St Louis - Houston George Bush Intcntl), is priced around $193.

  • 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 $123). Flying from St. Louis to Houston George Bush Intcntl Airport in February is currently the most expensive (average of $291). 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
Katy
The Woodlands
Spring
Montgomery
Tomball
Jersey Village
Humble
Cypress
Conroe

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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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$153Average$226FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$167Average$445FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$215Average$407FlexibilityNo cancel feeOn-time69%

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