$106 Cheap Flights from St. Louis (STL) to Houston (HOU)

View $106 flight on Thu, May 29, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from St. Louis to Houston (STL-HOU)

Prices were available within the past 7 days and start at $106 for one-way flights and $198 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, May 31 - Sun, Jun 1
STL
St. Louis
IAH
Houston
$198 Roundtrip, found 1 day ago
$198
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, May 31 from St. Louis to Houston, returning Sun, Jun 1, priced at $198 found 1 day ago
Frontier Airlines
Thu, May 8 - Mon, May 12
STL
St. Louis
IAH
Houston
$208 Roundtrip, found 7 hours ago
$208
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, May 8 from St. Louis to Houston, returning Mon, May 12, priced at $208 found 7 hours ago
Frontier Airlines
Fri, May 30 - Sat, May 31
STL
St. Louis
IAH
Houston
$218 Roundtrip, found 1 day ago
$218
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, May 30 from St. Louis to Houston, returning Sat, May 31, priced at $218 found 1 day ago
Frontier Airlines
Thu, May 1 - Mon, May 5
STL
St. Louis
IAH
Houston
$228 Roundtrip, found 1 hour ago
$228
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, May 1 from St. Louis to Houston, returning Mon, May 5, priced at $228 found 1 hour ago
United
Wed, May 21 - Sat, May 24
STL
St. Louis
IAH
Houston
$230 Roundtrip, found 4 hours ago
$230
Roundtrip
found 4 hours ago
Select United flight, departing Wed, May 21 from St. Louis to Houston, returning Sat, May 24, priced at $230 found 4 hours ago
Frontier Airlines
Tue, May 6 - Sun, May 25
STL
St. Louis
IAH
Houston
$230 Roundtrip, found 6 days ago
$230
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Tue, May 6 from St. Louis to Houston, returning Sun, May 25, priced at $230 found 6 days ago
United
Sun, May 25 - Tue, Jun 3
STL
St. Louis
IAH
Houston
$236 Roundtrip, just found
$236
Roundtrip
just found
Select United flight, departing Sun, May 25 from St. Louis to Houston, returning Tue, Jun 3, priced at $236 just found
American Airlines
Wed, May 21 - Sat, May 24
STL
St. Louis
IAH
Houston
$240 Roundtrip, found 4 hours ago
$240
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Wed, May 21 from St. Louis to Houston, returning Sat, May 24, priced at $240 found 4 hours ago
Delta
Sun, May 25 - Tue, Jun 3
STL
St. Louis
IAH
Houston
$245 Roundtrip, just found
$245
Roundtrip
just found
Select Delta flight, departing Sun, May 25 from St. Louis to Houston, returning Tue, Jun 3, priced at $245 just found
Southwest Airlines
Wed, Jul 2 - Sat, Jul 5
STL
St. Louis
HOU
Houston
$257 Roundtrip, found 11 hours ago
$257
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Wed, Jul 2 from St. Louis to Houston, returning Sat, Jul 5, priced at $257 found 11 hours ago
Flights from St. Louis (STL) to Houston (IAH)
Origin airport
Lambert-St. Louis Intl.
Destination airport
George Bush Intercontinental
Airlines serving
American Airlines, Delta, Southwest Airlines
Roundtrip price
$198
Distance
667 mi

St. Louis to Houston Flights

The cheapest times to fly from St. Louis to Houston

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Houston are during the month of May. You can find some of the cheapest flights from St. Louis to Houston with Expedia's search tool and vast selection of airlines.

The best time to book a flight from St. Louis to Houston

Sunday is one of the best days to book for cheap flights from St. Louis to Houston: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from St. Louis to Houston

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Houston in 2025. You can also book with separate airlines for your outbound and return journeys, from $106 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Houston flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Houston airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU) cost?
Snag cheap return fares starting at $271 from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving STL on May 14 2025 and touching down at HOU. The price was last updated on April 22 2025 and has not changed since.
What is the cheapest month to fly from STL to HOU?
The cheapest flights from STL to HOU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
When departing from Lambert-St. Louis Intl. Airport (STL), you can catch a nonstop flight to William P. Hobby Airport (HOU) with Southwest Airlines.
What is the cheapest airline that flies from STL to HOU?
At the moment, the cheapest carrier operating one-way flights from STL to HOU is Southwest Airlines. You can take off on this route from $136. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from STL on June 10 2025. Prices were last updated on April 22 2025 and have not changed since.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
Every day, an average of 3 nonstop flights operate from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU). Choose the departure date that best suits your plans.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
The 6 AM departures from STL to HOU are typically the busiest. They can also be more expensive. If you’re hoping to save money, choose a less crowded time to fly.
What day of the week has the most flights from STL to HOU?
Travel on a Friday if you’re after the best choice of flights from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
Lambert-St. Louis Intl. Airport (STL)’s earliest flight to William P. Hobby Airport (HOU) takes off at approximately 6:40AM UTC-6. With a travel time of 2h 20m, you’ll touch down at around 9:00AM UTC-6.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
It takes around 2 hours and 16 minutes to travel the 690 mi from STL to HOU.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
To arrive at William P. Hobby Airport (HOU) without delays, opt for a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Houston from Lambert-St. Louis Intl. Airport (STL)?
If you’re departing on a direct flight from Lambert-St. Louis Intl. Airport (STL) to Houston, you’ll touch down at either George Bush Intercontinental Airport (IAH) or William P. Hobby Airport (HOU).
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU) last-minute?
Booking your plane ticket from STL to HOU shortly before your getaway is typically more expensive. But if you’re flexible with your itinerary, you could bag a cheap last-minute fare.
Is it cheaper to book a STL to HOU flight and hotel package?
You’ll typically save money by securing a STL to HOU flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s simple to manage everything in one convenient place. After selecting your ideal accommodations and flights, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to William P. Hobby Airport (HOU)?
If you booked your STL to HOU flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.