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$63+ 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HOU
Jun 9 — Jun 161
Tue 6/9
Tue 6/16
1 adult, Economy
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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 Thursday 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 May 10, 2026.

This CheapOair deal was found by Cheapflights users on 5/9. 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.
Sat 6/277:38 pm
STL
-
IAH
1 stop15h 04m
Frontier
Sat 7/46:30 am
IAH
-
STL
1 stop12h 23m
Frontier
Deal found 5/9$260
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 6/125:06 pm
STL
-
IAH
1 stop14h 17m
Frontier
Mon 6/159:58 pm
IAH
-
STL
2 stops34h 54m
Frontier
Deal found 5/9$261
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Sun 6/146:31 pm
STL
-
IAH
1 stop12h 52m
Frontier
Fri 6/198:55 pm
IAH
-
STL
1 stop11h 57m
Frontier
Deal found 5/6$263
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 5/286:33 pm
STL
-
IAH
2 stops18h 01m
Frontier
Thu 6/48:02 pm
IAH
-
STL
1 stop12h 53m
Frontier
Deal found 5/7$264
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Wed 6/178:08 pm
STL
-
IAH
2 stops11h 15m
Frontier
Thu 6/188:02 pm
IAH
-
STL
1 stop12h 50m
Frontier
Deal found 5/6$265
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/155:06 pm
STL
-
IAH
1 stop14h 17m
Frontier
Sun 6/2111:12 am
IAH
-
STL
1 stop6h 18m
Frontier
Deal found 5/6$266
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/46:33 pm
STL
-
IAH
2 stops25h 22m
Frontier
Thu 6/1111:12 am
IAH
-
STL
1 stop6h 18m
Frontier
Deal found 5/7$269
This Expedia deal was found by Cheapflights users on 5/6. 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.
Sat 5/238:08 pm
STL
-
IAH
1 stop28h 36m
Frontier
Mon 5/257:44 pm
IAH
-
STL
1 stop28h 13m
Frontier
Deal found 5/6$270
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/186:31 pm
STL
-
IAH
1 stop12h 52m
Frontier
Sat 6/208:59 pm
IAH
-
STL
1 stop20h 31m
Frontier
Deal found 5/6$274
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 7/104:52 pm
STL
-
IAH
2 stops18h 04m
Frontier
Mon 7/138:55 pm
IAH
-
STL
1 stop20h 42m
Frontier
Deal found 5/5$275
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/256:31 pm
STL
-
IAH
1 stop12h 52m
Frontier
Sat 6/278:59 pm
IAH
-
STL
1 stop20h 31m
Frontier
Deal found 5/6$276
This Southwest deal was found by Cheapflights users on 5/9. 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 6/105:25 am
STL
-
HOU
Nonstop2h 05m
Southwest
Tue 6/167:05 pm
HOU
-
STL
Nonstop2h 05m
Southwest
Deal found 5/9$277

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 May 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$260
(CheapOair)

One-way from

$63
(Kiwi.com)

Popular in

February

Cheapest in

September

Average price

$368
Provider with most accurate pricing for Lambert-St Louis-Houston flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Houston flights.
Search Deals
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. 9% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 10, 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
Quickest round-trip

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Wed 7/1

8:45 am-10:50 am

Nonstop2h 05m

Houston Hobby

Sun 7/5

7:35 am-9:35 am

Nonstop2h 00m

$346

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Tue 6/16

5:25 am-7:30 am

Nonstop2h 05m

Houston Hobby

Thu 6/18

7:20 am-9:25 am

Nonstop2h 05m

$346

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 6/4

8:35 am-10:52 am

Nonstop2h 17m

Houston George Bush Intcntl

Thu 6/11

8:00 am-10:07 am

Nonstop2h 07m

$353

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Wed 6/17

8:25 am-2:00 pm

1 stop5h 35m

Houston Hobby

Fri 6/19

7:00 am-11:00 am

1 stop4h 00m

$366

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 6/2

11:10 am-1:25 pm

Nonstop2h 15m

Houston George Bush Intcntl

Tue 6/9

2:33 pm-9:21 pm

1 stop6h 48m

$367

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 7/3

5:33 pm-10:59 pm

1 stop5h 26m

Houston George Bush Intcntl

Tue 7/14

8:00 am-10:07 am

Nonstop2h 07m

$367

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Sat 5/30

8:45 am-3:40 pm

1 stop6h 55m

Houston Hobby

Sun 5/31

10:15 pm-12:15 am

Nonstop2h 00m

$374

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 7/21

11:10 am-1:25 pm

Nonstop2h 15m

Houston George Bush Intcntl

Tue 7/28

8:00 am-10:07 am

Nonstop2h 07m

$390

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 7/15

11:10 am-1:25 pm

Nonstop2h 15m

Houston George Bush Intcntl

Mon 7/20

6:10 am-12:11 pm

1 stop6h 01m

$393

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 5/22

5:10 am-11:15 am

1 stop6h 05m

Houston George Bush Intcntl

Mon 6/1

8:30 pm-10:45 pm

Nonstop2h 15m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 40 resultsSorted by cheapest first
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Compare providers for flights from St. Louis to Houston

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 Houston in May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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 St. Louis-Houston 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 flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Houston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Houston 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 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 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?

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 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 May 10, 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 23% on your trip compared to booking a flight at noon.

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 May 9, 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.

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

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 May 10, 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
8.0
Very good
4,304 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,304 reviews
Southwest
8.0
Very good
4,304 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,694 reviews
Southwest
8.0
Very good
4,304 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.1
Good
11,667 reviews
Southwest
8.0
Very good
4,304 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,635 reviews
Southwest
8.0
Very good
4,304 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.6
Fair
2,955 reviews
Southwest
8.0
Very good
4,304 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • 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 05m. Fly via Southwest or United Airlines to get the fastest option. St. Louis and Houston are separated by a distance of 688 mi. All flights are typically nonstop.

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

    Currently priced at $108, Spirit Airlines will fly you from St. Louis to Houston and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and United Airlines - these airlines can fly you to your destination from $126 and $131, respectively. Spirit Airlines is priced at 69% 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 $80 while deals on Southwest start at $158 one-way.

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

    The cheapest flight price from St. Louis to Houston is $173. On average you can expect to pay $319. The most popular route, (Lambert-St Louis - Houston Hobby), can usually be booked for $249.

  • 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

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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 May 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$108Average$202FlexibilityNo cancel feeOn-time65%
FrontierCheapest$126Average$231FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$131Average$397FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$167Average$469FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$217Average$382FlexibilityNo cancel feeOn-time63%

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