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$62+ Cheap flights from St. Louis (STL) to Houston

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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HOU
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Houston are usually found in September or August, booked 72 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Houston

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Houston (HO1). 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 13, 2025.

Round-trip from

$140
(United Airlines)

One-way from

$62
(Southwest)

Popular in

January

Cheapest in

September

Average price

$304
From Lambert-St Louis to Houston
Search Deals
One-way flight from Lambert-St Louis to Houston
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Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to Houston

Cheapest flights from St. Louis to Houston
Explore the most affordable flight options available from St. Louis to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 13, 2025.

This Southwest deal was found by Cheapflights users on 8/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:20 pmSTL - HOU
Nonstop2h 00mSouthwest
Tue 9/165:35 amHOU - STL
Nonstop2h 00mSouthwest
Deal found 8/10$123
This Southwest deal was found by Cheapflights users on 8/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:55 pmSTL - HOU
Nonstop2h 00mSouthwest
Sat 9/63:00 pmHOU - STL
Nonstop2h 05mSouthwest
Deal found 8/10$140
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:15 amSTL - IAH
Nonstop2h 11mUnited Airlines
Sat 9/1312:15 pmIAH - STL
Nonstop2h 11mUnited Airlines
Deal found 8/11$140
This Southwest deal was found by Cheapflights users on 8/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:35 pmSTL - HOU
Nonstop2h 05mSouthwest
Mon 10/67:45 pmHOU - STL
Nonstop1h 55mSouthwest
Deal found 8/10$157
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Fri 10/108:25 amSTL - IAH
Nonstop2h 12mUnited Airlines
Sun 10/127:57 pmIAH - STL
Nonstop2h 03mUnited Airlines
Deal found 8/10$157
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/39:30 amSTL - HOU
1 stop4h 33mAmerican Airlines
Sat 9/64:28 pmHOU - STL
1 stop3h 47mAmerican Airlines
Deal found 8/10$159
This American Airlines deal was found by Cheapflights users on 8/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:16 amSTL - IAH
1 stop6h 24mAmerican Airlines
Wed 9/106:20 amIAH - STL
1 stop7h 11mAmerican Airlines
Deal found 8/11$159
This Southwest deal was found by Cheapflights users on 8/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/75:35 amSTL - HOU
Nonstop2h 05mSouthwest
Sun 9/141:55 pmHOU - STL
1 stop4h 40mSouthwest
Deal found 8/10$167
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:18 amSTL - HOU
1 stop4h 26mAmerican Airlines
Sat 9/139:04 amHOU - STL
1 stop6h 05mAmerican Airlines
Deal found 8/10$168
This American Airlines deal was found by Cheapflights users on 8/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:10 amSTL - IAH
1 stop6h 33mAmerican Airlines
Sat 9/135:00 amIAH - STL
1 stop4h 14mAmerican Airlines
Deal found 8/11$168
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/285:18 amSTL - HOU
1 stop4h 21mAmerican Airlines
Sat 10/116:39 pmHOU - STL
1 stop4h 39mAmerican Airlines
Deal found 8/10$171
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/35:18 amSTL - HOU
1 stop4h 26mAmerican Airlines
Mon 10/64:41 pmHOU - STL
1 stop7h 08mAmerican Airlines
Deal found 8/10$177

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Houston 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 13, 2025.
Use the filters below to find and compare flights from St. Louis to Houston that are best for you.

Fly from

St. Louis

Fly to

Houston

Route

Depart

Return

Price

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 9/11

6:15 am-8:26 am

Nonstop2h 11m

Houston George Bush Intcntl

Sat 9/13

12:15 pm-2:26 pm

Nonstop2h 11m

$140

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Mon 9/22

5:15 am-7:20 am

Nonstop2h 05m

Houston Hobby

Thu 9/25

8:00 am-10:00 am

Nonstop2h 00m

$157

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Mon 9/8

6:55 pm-8:55 pm

Nonstop2h 00m

Houston Hobby

Mon 9/15

5:10 am-7:10 am

Nonstop2h 00m

$157

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 10/10

8:25 am-10:37 am

Nonstop2h 12m

Houston George Bush Intcntl

Sun 10/12

7:57 pm-10:00 pm

Nonstop2h 03m

$157

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Fri 10/3

5:30 am-7:35 am

Nonstop2h 05m

Houston Hobby

Sun 10/5

10:10 pm-12:05 am

Nonstop1h 55m

$157

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Thu 10/23

5:30 am-7:35 am

Nonstop2h 05m

Houston Hobby

Sun 10/26

5:25 am-7:20 am

Nonstop1h 55m

$157

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Fri 10/3

7:35 pm-9:40 pm

Nonstop2h 05m

Houston Hobby

Mon 10/6

7:45 pm-9:40 pm

Nonstop1h 55m

$157

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Fri 10/10

5:30 am-7:35 am

Nonstop2h 05m

Houston Hobby

Sun 10/12

5:25 am-7:20 am

Nonstop1h 55m

$157

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 9/9

7:16 am-1:40 pm

1 stop6h 24m

Houston George Bush Intcntl

Wed 9/10

6:20 am-1:31 pm

1 stop7h 11m

$159

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Fri 9/5

5:18 am-9:44 am

1 stop4h 26m

Houston Hobby

Sat 9/13

9:04 am-3:09 pm

1 stop6h 05m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 44 results
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The best insider tips for St. Louis to Houston 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 trip
Airlines
Southwest

Southwest offers two free checked bags, including oversized items like skis.


Southwest's open seating policy allows passengers to choose any available seat.

Read more about Southwestby Marisa Garcia
United Airlines

Basic Economy allows a personal item only, no carry-on bags without extra fees.


Economy Plus offers extra legroom seats towards the front of the economy cabin.

Read more about United Airlinesby Harriet Baskas
Airports
STL

Security screening at STL typically takes 5 to 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 from IAH, consider using Uber or Lyft, which pick up at Terminals A, B, and C.

Read more about IAHby Evie Carrick
HOU

HOU's arrival roadways are generally congestion-free. Consider using a map app with real-time traffic info for efficient navigation.

Read more about HOUby Scott Laird
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
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
Scott Laird

Scott Laird

Expert on HOU

Scott Laird

Scott Laird

Originally from Anchorage, Alaska, Scott is a frequent contributor to Fodor’s Travel Guide, Conde Nast Traveler, TravelAge West, and TravelPulse. He holds a Bachelor of Science in Organizational Management from Alaska Pacific University and a Master of Science in Airline Management from Embry-Riddle Aeronautical University, and has worked in the airline and hotel industries and as a travel consultant.

Read more

Best time to book a flight from St. Louis to Houston

Have a flexible travel schedule? Discover the best time to fly to Houston 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

How far ahead should I book a flight from St. Louis to Houston?

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

To ensure you get the cheapest price possible for a flight from St. Louis to Houston, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Houston?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Houston (average of $230). Flying from St. Louis to Houston in March is currently the most expensive (average of $331). 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 HOU?

Find hourly flight availability from St. Louis to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 13, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Houston in the evening. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from St. Louis to Houston?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Houston. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to Houston flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Houston

Get insights into the airlines that provide service to Houston. 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 Houston. Reviews last updated August 13, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from St. Louis to Houston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,920 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
8,048 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
5.8
Fair
3,221 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Houston. 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?

    For a flight from St. Louis to Houston, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 3 outbound flights to Houston per day. 5 airlines have flights to Houston from Lambert-St Louis on a regular basis.

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

    Currently priced at $140, United Airlines will fly you from St. Louis to Houston and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and American Airlines - these airlines can fly you to your destination from $157 and $159, respectively. United Airlines is priced at 59% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from St. Louis to Houston?

    The cheapest flight price from St. Louis to Houston is $91. On average you can expect to pay $234. The most popular route, (Lambert-St Louis - Houston Hobby), can usually be booked for $140.

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

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

  • How can I find direct flights from St. Louis to Houston?

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

  • Can I find deals for business class flights from St. Louis to Houston?

    Yes. Cheapflights offers flight deals from St. Louis to Houston 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?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Houston (average of $230). Flying from St. Louis to Houston in March is currently the most expensive (average of $331). 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

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Alternative routes for St. Louis to Houston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to Houston

Discover the top 5 airlines that operate flights from St. Louis to Houston. 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 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$107Average$188FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$127Average$270FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$178Average$402FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$193Average$370FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$216Average$401FlexibilityNo cancel feeOn-time69%

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