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$70+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — STL
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
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 January or October, booked 87 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap 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 March 16, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/1812:37 pm
IAH
-
STL
1 stop6h 55m
Frontier
Mon 4/208:23 pm
STL
-
IAH
1 stop26h 27m
Frontier
Deal found 3/12$161
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:14 pm
IAH
-
STL
1 stop12h 36m
Multiple Airlines
Fri 4/248:23 pm
STL
-
IAH
1 stop14h 48m
Multiple Airlines
Deal found 3/15$171
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Tue 4/146:15 am
IAH
-
STL
1 stop24h 35m
Multiple Airlines
Sat 4/188:23 pm
STL
-
IAH
1 stop14h 48m
Multiple Airlines
Deal found 3/11$175
This Frontier deal was found by Cheapflights users on 3/16. 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 4/91:17 pm
IAH
-
STL
1 stop18h 34m
Frontier
Mon 4/138:41 am
STL
-
IAH
1 stop23h 57m
Frontier
Deal found 3/16$179
This Expedia deal was found by Cheapflights users on 3/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:23 pm
IAH
-
STL
1 stop8h 56m
Frontier
Sun 4/1911:16 am
STL
-
IAH
1 stop11h 34m
Frontier
Deal found 3/15$180
This Booking.com deal was found by Cheapflights users on 3/11. 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.
Fri 5/87:44 pm
IAH
-
STL
1 stop28h 37m
Frontier
Sun 5/1012:16 pm
STL
-
IAH
1 stop24h 17m
Frontier
Deal found 3/11$182
This Mytrip deal was found by Cheapflights users on 3/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:45 am
IAH
-
STL
1 stop27h 03m
Frontier
Sun 4/1911:16 am
STL
-
IAH
1 stop11h 34m
Frontier
Deal found 3/15$189
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/112:46 pm
IAH
-
STL
1 stop10h 39m
Frontier
Wed 4/84:59 pm
STL
-
IAH
1 stop15h 39m
Frontier
Deal found 3/13$191
This Frontier deal was found by Cheapflights users on 3/15. 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.
Wed 3/259:15 pm
IAH
-
STL
1 stop10h 02m
Frontier
Sun 4/1911:16 am
STL
-
IAH
1 stop11h 34m
Frontier
Deal found 3/15$201

Find 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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$161
(Kiwi.com)

One-way from

$70
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$519

Good round-trip deal

$415 or less

Good one-way deal

$251 or less
Provider with most accurate pricing for Houston George Bush Intcntl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Houston George Bush Intcntl-Lambert-St Louis flights.
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From Houston George Bush Intcntl to Lambert-St Louis
Search Deals
One-way flight from Houston George Bush Intcntl to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 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 Houston George Bush Intcntl to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Houston George Bush Intcntl to Lambert-St Louis.
Search Deals

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 March 16, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 4/14

8:20 pm-10:28 pm

Nonstop2h 08m

Lambert-St Louis

Sat 4/18

6:00 am-8:18 am

Nonstop2h 18m

$278
Quickest round-trip

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 4/10

7:20 am-9:25 am

Nonstop2h 05m

Lambert-St Louis

Fri 4/17

6:00 am-8:19 am

Nonstop2h 19m

$343

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 4/16

7:20 am-9:25 am

Nonstop2h 05m

Lambert-St Louis

Mon 4/20

6:00 am-8:19 am

Nonstop2h 19m

$361

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 4/7

8:20 pm-10:28 pm

Nonstop2h 08m

Lambert-St Louis

Tue 4/14

7:45 am-1:38 pm

1 stop5h 53m

$368

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 5/15

8:23 pm-10:30 pm

Nonstop2h 07m

Lambert-St Louis

Sun 5/17

6:00 am-8:18 am

Nonstop2h 18m

$369

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 5/27

12:00 pm-2:16 pm

Nonstop2h 16m

Lambert-St Louis

Sat 5/30

8:00 am-1:30 pm

1 stop5h 30m

$377

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 4/14

7:20 am-9:25 am

Nonstop2h 05m

Lambert-St Louis

Thu 4/16

6:00 am-8:19 am

Nonstop2h 19m

$381

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 4/21

7:20 am-9:25 am

Nonstop2h 05m

Lambert-St Louis

Fri 4/24

8:15 pm-1:48 am

1 stop5h 33m

$394

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 4/3

7:20 am-9:25 am

Nonstop2h 05m

Lambert-St Louis

Sun 4/5

10:00 am-3:49 pm

1 stop5h 49m

$413
Cheapest one-way

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 6/10

12:00 pm-2:16 pm

Nonstop2h 16m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 21 resultsSorted by cheapest first
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3

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

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 George Bush Intcntl to St. Louis in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*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 Houston George Bush Intcntl Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Houston George Bush Intcntl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Houston George Bush Intcntl Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Houston George Bush Intcntl Airport-St. Louis 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 Houston George Bush Intcntl Airport-St. Louis 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 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 March 13, 2026.

Booking 86 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, October is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $117). Flying from Houston George Bush Intcntl Airport to St. Louis in February is currently the most expensive (average of $340). 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 March 16, 2026.

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 34% 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 March 14, 2026.

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. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Houston George Bush Intcntl Airport to St. Louis 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 Houston George Bush Intcntl Airport to St. Louis 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 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 March 16, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andFrontier 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
9,429 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,429 reviews
United Airlines
7.4
Good
9,429 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.1
Good
11,466 reviews
United Airlines
7.4
Good
9,429 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Frontier
5.7
Fair
3,031 reviews
United Airlines
7.4
Good
9,429 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 13 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.

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

    Airlines like United Airlines fly from Houston George Bush Intcntl Airport to St. Louis in about 2h 08m. The time it takes to get you to your destination is usually consistent. There are 668 mi between Houston George Bush Intcntl Airport and St. Louis. Most flights are nonstop.

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

    According to our current data, Frontier ($128), American Airlines ($180), and United Airlines ($220) offers the cheapest pricing from Houston George Bush Intcntl Airport to St. Louis. These flights start at 66% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Houston George Bush Intcntl Airport to St. Louis are Frontier ($95), American Airlines ($118), and United Airlines ($158).

  • 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 ANA (92%), Mesa Airlines (87%) and Copa Airlines (83%).

  • 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 $158. On average you can expect to pay $503. The most popular route, (Houston George Bush Intcntl - Lambert-St Louis), can usually be booked for $171.

  • 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, October is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $117). Flying from Houston George Bush Intcntl Airport to St. Louis in February is currently the most expensive (average of $340). 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
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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Alternative routes for George Bush Intcntl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Hobby to St. Louis flights
Hobby to Kansas City flights
George Bush Intcntl to Kansas City flights
Hobby to Springfield flights
George Bush Intcntl to Springfield flights
Hobby to Columbia flights

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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$230FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$180Average$342FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$220Average$410FlexibilityNo cancel feeOn-time69%

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