$88 Cheap Flights from Houston (IAH) to St. Louis (STL)

View $88 flight on Fri, Nov 7, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $88 for one-way flights and $164 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Nov 14 - Mon, Nov 17
IAH
Houston
STL
St. Louis
$164 Roundtrip, found 3 hours ago
$164
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Fri, Nov 14 from Houston to St. Louis, returning Mon, Nov 17, priced at $164 found 3 hours ago
Frontier Airlines
Sat, Nov 1 - Mon, Nov 3
IAH
Houston
STL
St. Louis
$182 Roundtrip, found 7 hours ago
$182
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sat, Nov 1 from Houston to St. Louis, returning Mon, Nov 3, priced at $182 found 7 hours ago
Frontier Airlines
Thu, Nov 6 - Mon, Nov 10
IAH
Houston
STL
St. Louis
$199 Roundtrip, found 8 hours ago
$199
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Nov 6 from Houston to St. Louis, returning Mon, Nov 10, priced at $199 found 8 hours ago
United
Tue, Nov 4 - Fri, Nov 7
IAH
Houston
STL
St. Louis
$216 Roundtrip, found 3 days ago
$216
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 4 from Houston to St. Louis, returning Fri, Nov 7, priced at $216 found 3 days ago
Frontier Airlines
Fri, Nov 7 - Thu, Nov 13
IAH
Houston
STL
St. Louis
$217 Roundtrip, found 12 hours ago
$217
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Fri, Nov 7 from Houston to St. Louis, returning Thu, Nov 13, priced at $217 found 12 hours ago
American Airlines
Sun, Feb 15 - Thu, Feb 19
IAH
Houston
STL
St. Louis
$219 Roundtrip, found 1 day ago
$219
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Feb 15 from Houston to St. Louis, returning Thu, Feb 19, priced at $219 found 1 day ago
Frontier Airlines
Fri, Nov 14 - Mon, Nov 17
IAH
Houston
STL
St. Louis
$225 Roundtrip, found 3 hours ago
$225
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Fri, Nov 14 from Houston to St. Louis, returning Mon, Nov 17, priced at $225 found 3 hours ago
American Airlines
Sun, Feb 15 - Thu, Feb 19
IAH
Houston
STL
St. Louis
$228 Roundtrip, found 1 day ago
$228
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Feb 15 from Houston to St. Louis, returning Thu, Feb 19, priced at $228 found 1 day ago
American Airlines
Mon, Nov 24 - Thu, Nov 27
IAH
Houston
STL
St. Louis
$231 Roundtrip, found 5 days ago
$231
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Nov 24 from Houston to St. Louis, returning Thu, Nov 27, priced at $231 found 5 days ago
Delta
Mon, Oct 27 - Tue, Oct 28
IAH
Houston
STL
St. Louis
$234 Roundtrip, found 5 days ago
$234
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Oct 27 from Houston to St. Louis, returning Tue, Oct 28, priced at $234 found 5 days ago

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

November is typically the cheapest month to fly

From $116 - $421 per traveler.

Alternative airports near St. Louis

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

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $430
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $430

Frequently asked questions

How much does a flight from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight from $88 or cheap return flight from $164 from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from IAH to STL is November, when demand is low. Off-peak season is often when airlines offer lower prices between these airports.
Which airlines fly direct from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
If you're departing from George Bush Intercontinental Airport (IAH), you can catch a nonstop flight to Lambert-St. Louis Intl. Airport (STL) with United Airlines.
What is the cheapest airline that flies from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
Cheap flights between George Bush Intercontinental Airport (IAH) and Lambert-St. Louis Intl. Airport (STL) are often available through low-cost carriers like ANA and Virgin Australia. Keep in mind that prices can vary based on travel dates, demand and how early you book. With Expedia's filter tool, you can easily filter your results to find an IAH to STL flight that works with your budget.
How many flights per day from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
When taking off from George Bush Intercontinental Airport (IAH), you can choose from an average of 2 daily nonstop flights to Lambert-St. Louis Intl. Airport (STL).
What are the most popular departure times for flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
Flights between IAH and STL tend to be busiest at 12 PM. For a more relaxed experience and potentially cheaper tickets, choose a departure outside the usual busy windows.
What day of the week has the most flights from IAH to STL?
Sunday offers the most flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL). Consider leaving on this day and you'll have a greater chance of finding a schedule that works for you.
What is the earliest flight from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
George Bush Intercontinental Airport (IAH)'s earliest flight to Lambert-St. Louis Intl. Airport (STL) takes off at approximately 7:45AM UTC-6. With a total flight time of 2h 10m, you'll arrive at around 9:55AM UTC-6.
How long does it take to fly from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
The average flight time from IAH to STL is 2 hours and 8 minutes, covering a distance of 670 mi.
What airline has the least delays from IAH to STL?
With 82% of journeys generally arriving on schedule, United Airlines has the best on-time performance for direct flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL). To check your flight status and get notifications if anything changes, simply head to the Expedia App.
What is the best time to fly from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
To reach Lambert-St. Louis Intl. Airport (STL) on time, book a flight that leaves George Bush Intercontinental Airport (IAH) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 St. Louis from George Bush Intercontinental Airport (IAH)?
If you're taking a direct flight from George Bush Intercontinental Airport (IAH) to St. Louis, Lambert-St. Louis Intl. Airport (STL) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until right before your break to book a flight from IAH to STL generally means paying more. While it's possible to find some last-minute deals, they aren't always guaranteed. Be flexible with your itinerary for the best chance of scoring a bargain.
Is it cheaper to book an IAH to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAH to STL flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one place will take the stress out of travel planning. Simply pick your flights and choose from our extensive range of hotels, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
It's usually possible to cancel or reschedule your IAH to STL flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
George Bush Intercontinental
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$164
Distance
667 mi
Average flight time
2 hours 3 mins

Book with confidence

Book with confidence

Houston to St. Louis Flights

The cheapest times to fly from Houston to St. Louis

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 Houston to St. Louis are during the month of November. You can find some of the cheapest flights from Houston to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Houston to St. Louis: 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 Houston to St. Louis

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 Houston to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $88 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 Houston to St. Louis 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 Houston to St. Louis 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.

 

Houston to St. Louis Flights

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*Available to One Key members.