$64 Cheap Flights from St. Louis (STL) to Houston (IAH)

View $64 flight on Tue, Dec 16, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)

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

Prices were available within the past 7 days and start at $64 for one-way flights and $127 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Dec 16 - Wed, Jan 7
STL
St. Louis
IAH
Houston
$127 Roundtrip, just found
$127
Roundtrip
just found
Select United flight, departing Tue, Dec 16 from St. Louis to Houston, returning Wed, Jan 7, priced at $127 just found
American Airlines
Tue, Dec 16 - Wed, Jan 7
STL
St. Louis
IAH
Houston
$143 Roundtrip, just found
$143
Roundtrip
just found
Select American Airlines flight, departing Tue, Dec 16 from St. Louis to Houston, returning Wed, Jan 7, priced at $143 just found
American Airlines
Sat, Dec 6 - Sat, Dec 13
STL
St. Louis
IAH
Houston
$144 Roundtrip, found 3 hours ago
$144
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Sat, Dec 6 from St. Louis to Houston, returning Sat, Dec 13, priced at $144 found 3 hours ago
Frontier Airlines
Mon, Nov 3 - Sat, Nov 8
STL
St. Louis
IAH
Houston
$144 Roundtrip, found 16 hours ago
$144
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Mon, Nov 3 from St. Louis to Houston, returning Sat, Nov 8, priced at $144 found 16 hours ago
American Airlines
Tue, Feb 10 - Wed, Feb 11
STL
St. Louis
IAH
Houston
$145 Roundtrip, found 9 hours ago
$145
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Tue, Feb 10 from St. Louis to Houston, returning Wed, Feb 11, priced at $145 found 9 hours ago
Frontier Airlines
Fri, Dec 5 - Tue, Dec 9
STL
St. Louis
IAH
Houston
$147 Roundtrip, found 18 hours ago
$147
Roundtrip
found 18 hours ago
Select Frontier Airlines flight, departing Fri, Dec 5 from St. Louis to Houston, returning Tue, Dec 9, priced at $147 found 18 hours ago
United
Wed, Dec 10 - Thu, Dec 11
STL
St. Louis
IAH
Houston
$150 Roundtrip, just found
$150
Roundtrip
just found
Select United flight, departing Wed, Dec 10 from St. Louis to Houston, returning Thu, Dec 11, priced at $150 just found
Frontier Airlines
Sat, Dec 6 - Mon, Dec 15
STL
St. Louis
IAH
Houston
$150 Roundtrip, found 7 hours ago
$150
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sat, Dec 6 from St. Louis to Houston, returning Mon, Dec 15, priced at $150 found 7 hours ago
Delta
Tue, Dec 16 - Wed, Jan 7
STL
St. Louis
IAH
Houston
$152 Roundtrip, just found
$152
Roundtrip
just found
Select Delta flight, departing Tue, Dec 16 from St. Louis to Houston, returning Wed, Jan 7, priced at $152 just found
Delta
Tue, Jan 13 - Wed, Jan 14
STL
St. Louis
IAH
Houston
$153 Roundtrip, just found
$153
Roundtrip
just found
Select Delta flight, departing Tue, Jan 13 from St. Louis to Houston, returning Wed, Jan 14, priced at $153 just found

Find the cheapest month to fly from St. Louis (STL) to Houston (IAH)

November is typically the cheapest month to fly

From $115 - $308 per traveler.

Alternative airports near Houston

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to George Bush Intercontinental IAH. Cheapest option available. Average driving time to city center is 24 minutes. Flights from $443
IAH
George Bush Intercontinental
Cheapest
Average driving time to city center24 min
Flights from $443

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) cost?
Grab a cheap one-way flight from $64 or cheap return flight from $127 from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
Traveling in December is a great way to save, as it's the cheapest month for flights between STL and IAH. You'll typically find the lowest fares during the off-season.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
You can travel nonstop from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) on a United Airlines flight.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
To find the cheapest airline flying from STL to IAH, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
Each day on average, 2 direct flights take off from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH). Choose the departure that best suits your plans.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
The 6 AM departures from STL to IAH see the highest demand. They can also be more expensive. If you want to save on your trip, pick a less crowded time to fly.
What day of the week has the most flights from STL to IAH?
If you travel on a Friday, you'll get the biggest range of choices for flights from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
The earliest flight taking off from Lambert-St. Louis Intl. Airport (STL) is at around 6:15AM UTC-6. Catch this flight and you'll land at George Bush Intercontinental Airport (IAH) at approximately 8:40AM UTC-6. The total travel time is 2h 25m.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
The average flight time from STL to IAH is 2 hours and 23 minutes, covering a distance of 670 mi.
What airline has the least delays from STL to IAH?
Consider traveling with United Airlines if you'd like to go straight from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) without any interruptions. This carrier has the best track record for punctuality, with an on-time score of 82%. Want to be notified if anything changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) route, fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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)?
Catch a direct flight from Lambert-St. Louis Intl. Airport (STL) to Houston and land at George Bush Intercontinental Airport (IAH). Another convenient arrival point to this city is William P. Hobby Airport (HOU).
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH) last-minute?
Holding off until just before your trip to book a ticket from STL to IAH often results in higher prices. Although you may find some last-minute discounts, there's no guarantee. Keep your travel plans flexible to boost your chances of getting a bargain.
Is it cheaper to book a STL to IAH flight and hotel package?
You'll generally save money by booking a STL to IAH flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After selecting your ideal accommodations and flights, consider adding extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to George Bush Intercontinental Airport (IAH)?
In most instances, you're able to cancel or reschedule your STL to IAH flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you'd like more information, go to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
George Bush Intercontinental
Airlines serving
American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$127
Distance
667 mi
Average flight time
2 hours 17 mins

Book with confidence

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 December. 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 $64 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.

 

St. Louis to Houston Flights

Explore a world of travel with Expedia

*Available to One Key members.