How long is the flight from Houston to St. Louis?

Departing from Houston to St. Louis will take you 1h 57m. The distance between Houston and St. Louis is about 668 mi. This flight may include one or multiple stops.

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

Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $116. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $161 and $180, respectively. Frontier is 66% cheaper than the average price of flights available within the next 90 days to this destination.

How far ahead should I book a flight from Houston to St. Louis?

Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Houston to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Houston to St. Louis (average of $311). Flying from Houston to St. Louis in March is currently the most expensive (average of $356). 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 day to fly from Houston to St. Louis?

Travelers seeking maximum savings on their Houston to St. Louis flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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

The cheapest flight price from Houston to St. Louis is $114. On average you can expect to pay $251. The most popular route, (Houston Hobby - Lambert-St Louis), can usually be booked for $115.

What are the most popular airlines that fly from Houston to St. Louis?

When booking a flight from Houston to St. Louis, you may want to consider flying on Frontier, United Airlines or Southwest as they are the most popular for this route.

What is the cheapest time of day to fly from HOU to STL?

One of the essential ways to save on airfare from Houston to St. Louis is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 10% on airfare.

What airport do you fly into for flights to St. Louis from Houston?

For a flight from Houston to St. Louis, you will be flying into 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 4 inbound flights from Houston per day. 4 airlines have flights to Lambert-St Louis from Houston on a regular basis.

Can I find deals for flights from Houston to St. Louis that include hotel bookings?

Yes. In addition to deals on Houston to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Houston to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to St. Louis.

Can I find deals for business class flights from Houston to St. Louis?

Yes. Cheapflights offers flight deals from Houston to St. Louis 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 airports serve Houston to St. Louis flights?

You can fly from either of Houston’s major airports to St. Louis. The majority of the flights on this route have one stop in between. There are more flights going from George Bush Intercontinental Airport to Lambert-St. Louis International Airport than from William P. Hobby Airport in Houston. St. Louis Lambert International Airport is located 14 miles from the downtown district in St. Louis. You’ll sometimes see it listed as Lambert Field. This airport is the busiest and the biggest one in the state of Missouri. There is a second airport in the city or located close to the city but the majority of flights arrive at Lambert. There is a connected railway though if it’s needed for a traveler to make it to the other airport.

Which airlines fly directly from Houston to St. Louis?

There are not a lot of direct flights between these two cities but there are a few. They are operated by United. The flight is 2h 5m to 2h 12m, depending on the time of day you go. For more choices of departure times, you can look for a stopover flight.

What are the stopover options between Houston to St. Louis?

American Airlines has a stop in Dallas for this route. Most of these are an hour or less. Delta stops in Atlanta and sometimes in Detroit. There are also a couple of options that stop in Minneapolis. United offers flights that land in Chicago at O’Hare before moving on to St. Louis. Most of the flights are around five hours or so. The longest ones are about eight hours.

Do I need a passport or visa to fly from Houston to St. Louis?

You will not need your passport or a visa for this flight. The connections are all within the United States so the flights are purely domestic. There is only a requirement that you bring a valid form of identification to the airport so you are allowed to board the plane.

$58+ Cheap Flights from Houston to St. Louis

Round-trip from	$115 (United Airlines)
One-way from	$58 (Southwest)
Popular in	January
Cheapest in	April
Average price	$285

IAH

Check security wait times on IAH's website to ensure a smooth departure experience.

HOU

HOU's single terminal makes it easy to navigate, with short security lines outside peak holiday periods.

STL

Use MetroLink for a convenient and economical ride from STL to downtown St. Louis.

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$116	Average$231	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$161	Average$396	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$180	Average$342	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$210	Average$365	FlexibilityNo cancel fee	On-time63%

$58+ Cheap flights from Houston to St. Louis (STL)

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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Houston to Lambert-St Louis are usually found in April or September, booked 87 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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Cheapest flights from Houston to St. LouisExplore the most affordable flight options available from Houston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

Explore the most affordable flight options available from Houston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

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Best time to book a flight from Houston to St. Louis

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Everything you need to know about your flight from Houston to St. Louis

How far ahead should I book a flight from Houston to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Houston to St. Louis. Price data was last updated on September 12, 2025.

What is the cheapest month to book a flight from Houston to St. Louis?

What is the cheapest time of day to fly from HOU to STL?

Find hourly flight availability from Houston to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

What is the cheapest day to fly from Houston to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Houston to St. Louis. Price data was last updated on December 16, 2024.

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Houston to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Houston to St. Louis Travel Guide

Related info for your journey

Find useful and relevant information for your journey from Houston to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports serve Houston to St. Louis flights?

Which airlines fly directly from Houston to St. Louis?

What are the stopover options between Houston to St. Louis?

Do I need a passport or visa to fly from Houston to St. Louis?

What airport do you fly into for flights to St. Louis from Houston?

How long is the flight from Houston to St. Louis?

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

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

Can I find deals for flights from Houston to St. Louis that include hotel bookings?

How can I find direct flights from Houston to St. Louis?

Can I find deals for business class flights from Houston to St. Louis?

What is the cheapest month to book a flight from Houston to St. Louis?

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Cheapest flights from Houston to St. Louis
Explore the most affordable flight options available from Houston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.