HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Houston

$81+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HOU
Jul 26 — Aug 21
Sun 7/26
Sun 8/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Houston 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 are usually found in September or October, booked 54 days in advance, depart on a Tuesday or Friday and return on a Wednesday

Cheap 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 June 26, 2026.

This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:20 am
STL
-
HOU
Nonstop2h 05m
Southwest
Sat 7/257:35 pm
HOU
-
STL
1 stop3h 40m
Southwest
Deal found 6/22$277
This CheapOair deal was found by Cheapflights users on 6/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/137:10 pm
STL
-
IAH
1 stop24h 48m
Frontier
Mon 7/2010:09 pm
IAH
-
STL
1 stop21h 14m
Frontier
Deal found 6/22$278
This CheapOair deal was found by Cheapflights users on 6/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:08 pm
STL
-
IAH
1 stop28h 32m
Frontier
Sat 7/251:16 pm
IAH
-
STL
1 stop10h 43m
Frontier
Deal found 6/24$279
This Southwest deal was found by Cheapflights users on 6/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:15 pm
STL
-
HOU
1 stop4h 00m
Southwest
Wed 7/2911:05 am
HOU
-
STL
Nonstop2h 00m
Southwest
Deal found 6/24$281
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 7/237:10 pm
STL
-
IAH
2 stops36h 10m
Frontier
Thu 7/3010:53 am
IAH
-
STL
1 stop6h 44m
Frontier
Deal found 6/25$281
This Southwest deal was found by Cheapflights users on 6/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:35 am
STL
-
HOU
2 stops5h 10m
Southwest
Tue 7/281:20 pm
HOU
-
STL
Nonstop2h 00m
Southwest
Deal found 6/23$282
This Kiwi.com deal was found by Cheapflights users on 6/23. 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.
Mon 7/134:57 pm
STL
-
IAH
1 stop17h 06m
Frontier
Sat 7/188:02 pm
IAH
-
STL
1 stop21h 35m
Frontier
Deal found 6/23$283
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:15 am
STL
-
HOU
Nonstop2h 00m
Southwest
Mon 8/1011:05 am
HOU
-
STL
Nonstop2h 00m
Southwest
Deal found 6/22$284
This United Airlines deal was found by Cheapflights users on 6/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:14 am
STL
-
IAH
Nonstop2h 17m
United Airlines
Wed 8/128:00 am
IAH
-
STL
Nonstop2h 10m
United Airlines
Deal found 6/25$284
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/178:08 pm
STL
-
IAH
2 stops13h 55m
Frontier
Sun 7/198:02 pm
IAH
-
STL
1 stop12h 55m
Frontier
Deal found 6/22$285
This Southwest deal was found by Cheapflights users on 6/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:25 am
STL
-
HOU
1 stop5h 40m
Southwest
Thu 10/226:00 am
HOU
-
STL
1 stop3h 30m
Southwest
Deal found 6/25$288
This CheapOair deal was found by Cheapflights users on 6/21. 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 8/287:58 pm
STL
-
IAH
1 stop28h 57m
Frontier
Sat 9/58:57 am
IAH
-
STL
1 stop7h 14m
Frontier
Deal found 6/21$289

Find 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 June 26, 2026.

Round-trip from

$277
(Southwest)

One-way from

$81
(Trip.com)

Popular in

February

Cheapest in

September

Average price

$402
From Lambert-St Louis to Houston
Search Deals
One-way flight from Lambert-St Louis to Houston
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 26, 2026.
Use the filters below to find and compare flights from St. Louis to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Thu 10/15

3:50 pm-9:40 pm

2 stops5h 50m

Houston Hobby

Tue 10/20

7:20 am-9:20 am

Nonstop2h 00m

$287

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Tue 9/29

2:45 pm-7:55 pm

2 stops5h 10m

Houston Hobby

Sat 10/3

12:20 pm-4:35 pm

1 stop4h 15m

$292

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Mon 8/31

3:45 pm-7:35 pm

1 stop3h 50m

Houston Hobby

Tue 9/8

11:20 am-4:25 pm

2 stops5h 05m

$309

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Fri 10/2

5:45 pm-9:35 pm

1 stop3h 50m

Houston Hobby

Tue 10/13

7:20 am-9:20 am

Nonstop2h 00m

$349

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Sat 8/1

9:50 am-1:25 pm

1 stop3h 35m

Houston Hobby

Sun 8/2

11:55 am-1:55 pm

Nonstop2h 00m

$349
Quickest round-trip

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 8/11

11:15 am-1:32 pm

Nonstop2h 17m

Houston George Bush Intcntl

Wed 8/12

8:00 am-10:10 am

Nonstop2h 10m

$351

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Wed 8/12

5:30 pm-7:30 pm

Nonstop2h 00m

Houston Hobby

Fri 8/14

4:50 pm-10:25 pm

1 stop5h 35m

$353

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 8/26

6:15 am-8:28 am

Nonstop2h 13m

Houston George Bush Intcntl

Mon 8/31

5:06 pm-10:59 pm

1 stop5h 53m

$364

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Mon 8/3

5:25 pm-9:50 pm

1 stop4h 25m

Houston Hobby

Wed 8/5

11:20 am-4:25 pm

2 stops5h 05m

$364

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Fri 7/17

5:25 pm-9:50 pm

1 stop4h 25m

Houston Hobby

Tue 7/21

3:00 pm-7:20 pm

1 stop4h 20m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 38 resultsSorted by cheapest first
1
2
3
4

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

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

Currently, August is the cheapest month in which you can book a flight from St. Louis to Houston (average of $75). Flying from St. Louis to Houston in March is currently the most expensive (average of $196). 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 June 26, 2026.

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 18% on your trip compared to booking a flight in the afternoon.

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

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

To ensure you get the cheapest price possible for a flight from St. Louis to Houston, you should look to book at least 53 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 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 June 20, 2026.

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

The best insider tips for St. Louis to Houston 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 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
Scott Laird

Scott Laird

Expert on HOU

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

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 June 26, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican 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
7.9
Good
4,245 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Southwest
7.9
Good
4,245 reviews
Southwest
7.9
Good
4,245 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
United Airlines
7.4
Good
9,893 reviews
Southwest
7.9
Good
4,245 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
American Airlines
7.1
Good
11,768 reviews
Southwest
7.9
Good
4,245 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Frontier
5.6
Fair
2,864 reviews
Southwest
7.9
Good
4,245 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

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 4 outbound flights to Houston per day. 4 airlines have flights to Houston from Lambert-St Louis on a regular basis.

  • How long is the flight from St. Louis to Houston?

    There are many flights that can get you from St. Louis to Houston in 2h 17m. Fly via Southwest or United Airlines to get the fastest option. St. Louis and Houston are separated by a distance of 668 mi. This flight may include one or multiple stops.

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

    Currently priced at $126, Frontier will fly you from St. Louis to Houston and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $131 and $158, respectively. Frontier is priced at 65% 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 one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $61. United Airlines flights start at $113 while deals on Southwest start at $159 one-way.

  • What are the most reliable airlines from St. Louis to Houston?

    Before booking your flight to Houston from St. Louis, check out the most reliable airlines to get you to your destination on time: Southwest (64%), Sun Country Air (0%), United Airlines( 0%).

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

    The cheapest flight price from St. Louis to Houston is $138. On average you can expect to pay $348. The most popular route, (Lambert-St Louis - Houston Hobby), can usually be booked for $240.

  • 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, August is the cheapest month in which you can book a flight from St. Louis to Houston (average of $75). Flying from St. Louis to Houston in March is currently the most expensive (average of $196). 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

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.

Alternative routes for St. Louis to Houston

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Dallas/Fort Worth flights
Kansas City to Dallas/Fort Worth flights
Kansas City to Hobby flights
St. Louis to Hobby flights
Kansas City to George Bush Intcntl flights
St. Louis to George Bush Intcntl flights
Kansas City to Austin flights
St. Louis to Love Field flights
St. Louis to San Antonio flights
Kansas City to Love Field flights
Kansas City to San Antonio flights
Springfield to Hobby flights
St. Louis to Austin flights
Columbia to Dallas/Fort Worth flights
Columbia to Hobby flights
Springfield to George Bush Intcntl flights
Columbia to George Bush Intcntl flights
Springfield to Dallas/Fort Worth flights
Kansas City to Corpus Christi flights
Kansas City to McAllen flights
Columbia to San Antonio flights
St. Louis to Amarillo flights
Springfield to Austin flights
Joplin to Dallas/Fort Worth flights
Springfield to San Antonio flights
Kansas City to El Paso flights
Columbia to Austin flights
St. Louis to McAllen flights
St. Louis to Lubbock flights
St. Louis to Harlingen flights
St. Louis to Corpus Christi flights
Kansas City to Brownsville flights
Kansas City to Harlingen flights
St. Louis to El Paso flights
St. Louis to Brownsville flights
Springfield to Corpus Christi flights
Springfield to El Paso flights
Kansas City to Lubbock flights
Springfield to McAllen flights
Joplin to Austin flights
Joplin to Hobby flights
St. Louis to Midland flights
Springfield to Love Field flights
St. Louis to Waco flights
Kansas City to Amarillo flights
Joplin to San Antonio flights
St. Louis to Abilene flights
Columbia to McAllen flights
St. Louis to Longview flights

Top 4 airlines flying from St. Louis to Houston

Discover the top 4 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 June 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$126Average$234FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$131Average$406FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$449FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$222Average$394FlexibilityNo cancel feeOn-time63%

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.