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$109 Cheap Flights from Houston (IAH) to St. Louis (STL)

View $109 flight on Fri, Oct 30, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $109 for one-way flights and $176 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Sep 19 - Mon, Sep 21
IAH
Houston
STL
St. Louis
$176 Roundtrip, found 1 day ago
$176
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 19 from Houston to St. Louis, returning Mon, Sep 21, priced at $176 found 1 day ago
Frontier Airlines
Tue, Oct 13 - Wed, Oct 14
IAH
Houston
STL
St. Louis
$186 Roundtrip, found 1 day ago
$186
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Oct 13 from Houston to St. Louis, returning Wed, Oct 14, priced at $186 found 1 day ago
Frontier Airlines
Sat, Sep 19 - Mon, Sep 21
IAH
Houston
STL
St. Louis
$206 Roundtrip, found 1 day ago
$206
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 19 from Houston to St. Louis, returning Mon, Sep 21, priced at $206 found 1 day ago
Frontier Airlines
Sat, Sep 19 - Mon, Sep 21
IAH
Houston
STL
St. Louis
$209 Roundtrip, found 1 day ago
$209
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 19 from Houston to St. Louis, returning Mon, Sep 21, priced at $209 found 1 day ago
Frontier Airlines
Tue, Oct 13 - Sat, Oct 17
IAH
Houston
STL
St. Louis
$216 Roundtrip, found 1 day ago
$216
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Oct 13 from Houston to St. Louis, returning Sat, Oct 17, priced at $216 found 1 day ago
American Airlines
Fri, Oct 30 - Sat, Oct 31
IAH
Houston
STL
St. Louis
$217 Roundtrip, found 6 days ago
$217
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Oct 30 from Houston to St. Louis, returning Sat, Oct 31, priced at $217 found 6 days ago
Frontier Airlines
Mon, Oct 12 - Tue, Oct 13
IAH
Houston
STL
St. Louis
$219 Roundtrip, found 1 day ago
$219
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Oct 12 from Houston to St. Louis, returning Tue, Oct 13, priced at $219 found 1 day ago
Delta
Sun, Sep 6 - Fri, Sep 11
IAH
Houston
STL
St. Louis
$237 Roundtrip, found 1 day ago
$237
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Sep 6 from Houston to St. Louis, returning Fri, Sep 11, priced at $237 found 1 day ago
United
Fri, Sep 4 - Fri, Sep 11
IAH
Houston
STL
St. Louis
$271 Roundtrip, found 1 day ago
$271
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 4 from Houston to St. Louis, returning Fri, Sep 11, priced at $271 found 1 day ago
Alaska Airlines
Fri, Sep 11 - Fri, Sep 18
IAH
Houston
STL
St. Louis
$844 Roundtrip, found 3 hours ago
$844
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, Sep 11 from Houston to St. Louis, returning Fri, Sep 18, priced at $844 found 3 hours ago

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 $429
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $429

What you need to know for your flight from George Bush Intercontinental to Lambert-St. Louis Intl.

Houston (IAH) to St. Louis (STL) at a glance

Travel from Houston (IAH) to St. Louis (STL) on a range of airlines operating this domestic short-haul route. Explore options from both full-service and budget carriers to discover the best itinerary that aligns with your budget and schedule while you visit St. Louis's iconic landmarks and vibrant neighborhoods. Check out the essential details for flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis International Airport (STL) to find the lowest price airfares to STL.

  • Fastest flight duration: around 2 hours non-stop
  • Route distance: roughly 700 miles (1,130 km)
  • Flights per week: around 15+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $80–$445, depending on seasonality and how far ahead you book

Flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis International Airport (STL)

According to recent traveler bookings, the most popular airlines flying from Houston to St. Louis often provide non-stop and one-stop options. Common layover spots include Dallas-Fort Worth International Airport (DFW) with an approximate 1 hour and 15-minute layover, and Hartsfield-Jackson Atlanta International Airport (ATL) with about a 3 hour and 15-minute layover. This variety allows you to compare prices, total travel times, and cabin classes to discover the ideal itinerary for your journey.

  • United: This comprehensive airline provides both non-stop and one-stop flights, with one-way ticket prices generally falling between $80 and $450. United represents about 72% of departures on this route, featuring a typical non-stop flight duration of 2 hours.
  • Frontier Airlines: As a budget-friendly option, Frontier offers one-stop services with one-way fares usually between $80 and $250. This airline covers roughly 14% of flights on this route, with an in-flight duration of 4 hours and 15 minutes, leading to a total travel time of about 6 hours and 30 minutes, including layover.
  • American Airlines: Another full-service carrier, American Airlines provides one-stop flights, with one-way fares that typically range from $80 to $455. They account for around 11% of departures on this route, featuring a flight time of 4 hours and 15 minutes and a total journey duration of approximately 6 hours and 30 minutes, including a layover.
  • Delta: Offering one-stop services, Delta is a full-service airline with one-way fares generally between $100 and $450. They make up about 3% of departures on this route, boasting a flight time of 4 hours and 15 minutes and a total travel time of approximately 6 hours and 30 minutes, factoring in layover time.

Travelers flying from Houston to St. Louis can opt for an upgrade, as United offers first-class service on this route for a more luxurious experience.

Best time to fly from Houston (IAH) to St. Louis (STL)

The most popular months for travelers flying from Houston to St. Louis are January, March, and April, when peak temperatures in St. Louis reach up to 56.1°F in April. If you prefer quieter travel, consider November, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 46.2°F. For better deals, August usually offers the lowest average one-way fare around $211. Flight availability peaks in November, with approximately 20 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 14 flights per week.

  • Cheapest time to fly: August usually offers good deals with average one-way fare around $211, roughly 14% cheaper than the yearly average.
  • More budget-friendly months to fly: October and September typically offer average one-way fares of around $219.
  • Most flight options: November has the highest number of flights from Houston to St. Louis, with approximately 20 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January31.6°F (-0.2°C)High14$280
February34.9°F (1.6°C)Average14$279
March46.4°F (8.0°C)High18$258
April56.1°F (13.4°C)High15$246
May66.6°F (19.2°C)Average19$234
June76.1°F (24.5°C)Average15$240
July78.6°F (25.9°C)Low17$266
August77.0°F (25.0°C)Average19$211
September70.9°F (21.6°C)Average16$224
October58.6°F (14.8°C)Average17$214
November46.2°F (7.9°C)Low20$245
December37.8°F (3.2°C)Low15$261

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Houston (IAH) to St. Louis (STL)

  • Houston to St. Louis (HOU-STL): William P. Hobby Airport (HOU) lies approximately 23 miles from George Bush Intercontinental Airport (IAH). One-way economy ticket prices for this route generally vary between $100 and $455, influenced by the season and timing of the booking. Travelers can typically choose between non-stop and one-stop flights. Leading airlines on this route include Southwest Airlines (a low-cost option) and American Airlines. Additionally, first-class service is offered for those seeking a more premium experience.

How to find the best prices for flights from Houston (IAH) to St. Louis (STL)

Getting some of the best deals on flights from Houston to St. Louis is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking at least two months in advance, although most travelers tend to book between two to eight weeks ahead. Evening departures (6 PM to 12 AM) often have lower prices, while morning flights (5 AM to 12 PM) are the most popular. Additionally, flying on Saturday generally provides cheaper options, though Thursday is the most favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Lambert-St. Louis International Airport from George Bush Intercontinental Airport

St. Louis welcomes travelers from Houston with a range of transport options based on price, convenience, and proximity. Here's how to reach St. Louis efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Louis, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Lambert-St. Louis International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Lambert-St. Louis International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is conveniently located just 0.1 miles away on foot, providing easy access to public transportation for travelers.

Frequently asked questions

How much does a flight from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $109 and cheap return flights from $176 Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights typically cost between $174 and $718, and return flights often range between $328 and $1103. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
April is the cheapest month to fly from Houston to St. Louis, with average return fares around $341. This price is about 18% lower than the average throughout the year, as demand tends to be lower in spring. Other budget-friendly months to consider are May and August.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
United offers around 41 weekly direct flights from IAH to STL.
What is the cheapest airline that flies from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
United is one of the cheapest airlines offering nonstop flights from George Bush Intercontinental (IAH) to Lambert-St. Louis Intl. (STL), with round-trip tickets starting from around $562. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Houston, TX (IAH) to St. Louis, MO (STL) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. American Airlines offers the most daily flights from IAH to STL, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
For flights from Houston (IAH) to St. Louis (STL), April and May are the best months to fly. You can find return flights for around $341 during these months. This time of year typically features mild weather, making it perfect for outdoor activities and sightseeing in St. Louis.*Prices based on flights available on Expedia in the last year.
How many flights per day from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are approximately 6 nonstop flights per day from George Bush Intercontinental (IAH) to Lambert-St. Louis Intl. (STL). For more options, look at flights that include layovers.
What is the earliest flight from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis International Airport (STL) usually departs at around 5:00 AM local time, operated by American Airlines. An early departure like this can help you maximize your day in St. Louis. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Houston (IAH) to St. Louis (STL) are in the early morning, from 6am to 9am. About 29% of passengers prefer this time window. Many major carriers, including American Airlines and United, offer flights during this window. This timing is favored because it allows you to arrive in St. Louis with plenty of time to start your day.
How long does it take to fly from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Direct flights from IAH to STL usually take about 2 hours, traveling roughly 668 miles. If you opt for a connecting flight, expect to add around 3 hours to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
First class is available on flights from IAH to STL. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How much is a business class flight from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A direct, return business class ticket from Houston, TX (IAH) to St. Louis, MO (STL) typically costs between $1,363 - $1,953. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from George Bush Intercontinental (IAH)?
From George Bush Intercontinental (IAH), you can fly into Lambert-St. Louis Intl. (STL) to reach St. Louis. Some flights may connect through major hubs like Dallas-Fort Worth Intl. (DFW), Miami Intl. (MIA), Charlotte-Douglas Intl. (CLT) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Houston, TX (IAH-George Bush Intercontinental) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
George Bush Intercontinental
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$176
Distance
667 mi
Average flight time
2 hours 11 mins

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 September. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $109 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

*Flight schedules are subject to change.

*Available to One Key members.

 

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