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$71+ Cheap flights from George Bush Intcntl (IAH) to St. Louis (STL)

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — STL
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheapflights Tip: The best prices from Houston George Bush Intcntl to Lambert-St Louis are usually found in August or May, booked 65 days in advance, depart on a Saturday or Friday and return on a Wednesday

Cheap flight deals from George Bush Intcntl to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to St. Louis (STL). 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 16, 2025.

Round-trip from

$144
(Priceline)

One-way from

$71
(Kiwi.com)

Popular in

February

Cheapest in

August

Average price

$336

Good round-trip deal

$217 or less

Good one-way deal

$315 or less
From Houston George Bush Intcntl to Lambert-St Louis
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One-way flight from Houston George Bush Intcntl to Lambert-St Louis
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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Houston George Bush Intcntl to Lambert-St Louis.
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Price to beat on a one-way flight from Houston George Bush Intcntl to Lambert-St Louis.
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Find flight deals from George Bush Intcntl to St. Louis

Cheapest flights from George Bush Intcntl to St. Louis
Explore the most affordable flight options available from George Bush Intcntl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Priceline deal was found by Cheapflights users on 8/15. 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.
Sun 9/76:05 amIAH - STL
1 stop8h 59mFrontier
Mon 9/84:00 pmSTL - IAH
1 stop5h 53mFrontier
Deal found 8/15$144
This Frontier deal was found by Cheapflights users on 8/15. 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 9/116:15 amIAH - STL
1 stop26h 51mFrontier
Mon 9/154:00 pmSTL - IAH
1 stop5h 53mFrontier
Deal found 8/15$152
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/59:08 pmIAH - STL
1 stop11h 58mFrontier
Thu 9/114:00 pmSTL - IAH
1 stop5h 52mFrontier
Deal found 8/14$153
This Priceline deal was found by Cheapflights users on 8/15. 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 8/237:10 amIAH - STL
1 stop6h 23mFrontier
Mon 8/252:01 pmSTL - IAH
1 stop8h 25mFrontier
Deal found 8/15$158
This FlightHub deal was found by Cheapflights users on 8/15. 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.
Sat 9/65:46 pmIAH - STL
1 stop21h 18mFrontier
Wed 9/177:55 pmSTL - IAH
1 stop27h 44mFrontier
Deal found 8/15$160
This FlightHub deal was found by Cheapflights users on 8/15. 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 8/256:05 amIAH - STL
1 stop6h 51mFrontier
Sun 10/51:57 pmSTL - IAH
1 stop25h 07mFrontier
Deal found 8/15$167
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/59:08 pmIAH - STL
1 stop11h 58mFrontier
Wed 9/107:55 pmSTL - IAH
1 stop15h 14mFrontier
Deal found 8/14$171
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:08 pmIAH - STL
1 stop11h 58mFrontier
Sun 9/284:00 pmSTL - IAH
1 stop5h 52mFrontier
Deal found 8/14$175
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.
Tue 10/711:36 amIAH - STL
1 stop21h 31mFrontier
Sat 10/117:52 pmSTL - IAH
1 stop14h 37mFrontier
Deal found 8/13$176
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:05 amIAH - STL
1 stop6h 51mFrontier
Mon 8/252:01 pmSTL - IAH
1 stop8h 25mFrontier
Deal found 8/14$179
This Priceline deal was found by Cheapflights users on 8/15. 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.
Fri 8/226:05 amIAH - STL
1 stop6h 51mFrontier
Sat 8/233:02 pmSTL - IAH
1 stop7h 54mFrontier
Deal found 8/15$182
This FlightHub deal was found by Cheapflights users on 8/15. 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.
Fri 9/126:15 amIAH - STL
1 stop26h 51mFrontier
Fri 9/191:57 pmSTL - IAH
1 stop25h 39mFrontier
Deal found 8/15$183

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to St. Louis 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 16, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to St. Louis that are best for you.

Fly from

George Bush Intcntl

Fly to

St. Louis

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 9/11

6:05 am-3:04 pm

1 stop8h 59m

Lambert-St Louis

Mon 9/15

4:00 pm-9:53 pm

1 stop5h 53m

$144

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 9/12

9:08 pm-9:06 am

1 stop11h 58m

Lambert-St Louis

Mon 9/15

4:00 pm-9:53 pm

1 stop5h 53m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 9/5

9:08 pm-9:06 am

1 stop11h 58m

Lambert-St Louis

Mon 9/8

4:00 pm-9:53 pm

1 stop5h 53m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 9/5

9:08 pm-9:06 am

1 stop11h 58m

Lambert-St Louis

Sun 9/7

4:00 pm-9:52 pm

1 stop5h 52m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 11/10

8:47 pm-9:07 am

1 stop12h 20m

Lambert-St Louis

Thu 11/13

11:07 am-5:01 pm

1 stop5h 54m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 9/6

9:08 pm-9:06 am

1 stop11h 58m

Lambert-St Louis

Mon 9/8

4:00 pm-9:53 pm

1 stop5h 53m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 10/3

9:08 pm-9:06 am

1 stop11h 58m

Lambert-St Louis

Mon 10/6

4:00 pm-9:53 pm

1 stop5h 53m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 9/5

9:08 pm-9:06 am

1 stop11h 58m

Lambert-St Louis

Thu 9/11

4:00 pm-9:52 pm

1 stop5h 52m

$153

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 10/6

11:39 am-8:37 pm

1 stop8h 58m

$71

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 9/4

6:05 am-3:04 pm

1 stop8h 59m

$76

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 18 results
1
2

The best insider tips for Houston George Bush Intcntl Airport to St. Louis 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 Houston George Bush Intcntl Airport to St. Louis trip
Airports
IAH

Check the IAH Depart tab online for current security wait times to plan your arrival at the airport efficiently.

Read more about IAHby Evie Carrick
STL

Use the MetroLink light rail for a convenient and economical way to reach downtown St. Louis from STL Airport.

Read more about STLby Taryn White
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 George Bush Intcntl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from George Bush Intcntl 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 Houston George Bush Intcntl Airport to St. Louis

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

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston George Bush Intcntl Airport to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $311). Flying from Houston George Bush Intcntl Airport to St. Louis in March is currently the most expensive (average of $356). 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 IAH to STL?

Find hourly flight availability from George Bush Intcntl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2025.

When flying from Houston George Bush Intcntl Airport to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 20% versus a flight in the morning.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to St. Louis. Price data was last updated on August 10, 2025.

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to St. Louis flight should consider departing on Friday afternoons when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated August 16, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Frontier from Houston George Bush Intcntl Airport to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,916 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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
3,211 reviews
United Airlines
7.4
Good
8,916 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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 George Bush Intcntl to St. Louis. 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 into for flights to St. Louis from Houston George Bush Intcntl?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Houston George Bush Intcntl to St. Louis. You should not have trouble finding flights to Lambert-St Louis from Houston George Bush Intcntl; the airport handles an average of 4 inbound flights from Houston George Bush Intcntl per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the St. Louis airport from Houston George Bush Intcntl. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

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

    According to our current data, Frontier ($109), American Airlines ($180), and United Airlines ($204) offers the cheapest pricing from Houston George Bush Intcntl Airport to St. Louis. These flights start at 71% lower than the current average price 3 months from now.

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

    The top 3 most reliable airlines when flying from Houston George Bush Intcntl Airport to St. Louis are CommutAir (100%), Virgin Australia (83%) and Air New Zealand (79%).

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

    The cheapest flight price from Houston George Bush Intcntl Airport to St. Louis is $147. On average you can expect to pay $322. The most popular route, (Houston George Bush Intcntl - Lambert-St Louis), can usually be booked for $186.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from George Bush Intcntl to St. Louis 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 Houston George Bush Intcntl Airport to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $311). Flying from Houston George Bush Intcntl Airport to St. Louis in March is currently the most expensive (average of $356). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
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Top 3 airlines flying from George Bush Intcntl to St. Louis

Discover the top 3 airlines that operate flights from George Bush Intcntl to St. Louis. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$222FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$180Average$342FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$204Average$395FlexibilityNo cancel feeOn-time69%

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