Cheap Flights from Houston (HOUA) to St Louis (STL)

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Flight deals from Houston to St Louis

Looking for a cheap last-minute deal or the best round-trip flight from Houston to St Louis? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Houston to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Houston to St Louis flights are currently cheapest in June.

Direct flights from Houston to St Louis

Houston to St Louis: Alternative routes

Compare routes from Houston to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Houston to St Louis: Flight information

The things to know before you go.
Cheapest flight found$93
Cheapest month to flyJune
Average flight time2 hrs, 6 mins
Most popular airlineSouthwest Airlines
Average flights per week167

Finding cheap flights from Houston to St Louis: Frequently asked questions

The best price we found for a round-trip flight from Houston to St Louis is $175. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 5 minutes is the average flight time from Houston to St Louis.
Southwest Airlines, United and Mesa Airlines fly direct from Houston to St Louis.
There are 185 flights per week flying from Houston to St Louis, as of May 2025.
The cheapest month to fly from Houston to St Louis is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Houston to St Louis Airport on Thursday, May 29, 2025.
Yes – the average flight time is 2 hours and 5 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.

Traveling from Houston to Lambert-St. Louis International Airport (STL): what you need to know

  • Kick off your journey at one of Houston's main airports, George Bush Intercontinental Airport (IAH) or William P. Hobby Airport (HOU). Check out your options for booking a flight from Houston to Lambert-St. Louis International Airport (STL) jetting off from either of these.

  • 2 hours 5 minutes is the average duration of a direct flight from Houston to Lambert-St. Louis International Airport.

  • Houston and St Louis (where Lambert-St. Louis International Airport is located) share the UTC-5 timezone. That means you won't need to adjust your watch on arrival.

  • With 39 direct flights a week between the two airports, George Bush Intercontinental Airport (IAH) to Lambert-St. Louis International Airport (STL) is the busiest route. Southwest Airlines operates the earliest flight at 05:00. If you prefer to make the most of your day before flying, the latest departure from IAH to STL is with Southwest Airlines at 22:25.

  • To ensure you catch your flight from Houston to STL, allow plenty of time to check in and find your gate. Arriving two hours ahead of international departures and one hour before domestic flights is the standard rule.

  • With more people on the move during busy periods like July, get to the terminal earlier than usual. Two hours for domestic flights and as much as four for international journeys will help you stay ahead of the crowds. Remember things also get busy during major holidays like Fourth of July.

Airports in Houston

George Bush Intercontinental Airport (IAH)

William P. Hobby Airport (HOU)

  • Planning to leave from William P. Hobby Airport (HOU)? You can book a direct flight from Houston to Lambert-St. Louis International Airport (STL) departing from this busy hub.

  • United has direct flights from Houston to STL departing from HOU. Book your preferred window seat and reach your destination in a single hop.

  • Using public transport, you can travel from central Houston to HOU in about 1 hour and 42 minutes. The terminal is roughly 12 miles away, and getting there by car will take approximately 22 minutes.

  • Get a head start on your vacation with an extra night away from home. Before your flight from Houston to STL, take it easy in one of these hotels near William P. Hobby Airport:

About Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • From Lambert-St. Louis International Airport, St Louis is approximately 16 miles away. It takes around 21 minutes to reach the center driving.

  • It takes around 36 minutes when traveling by public transport.

How to find the cheapest flights from Houston to Lambert-St. Louis International Airport (STL)

  • The lowest price we've found for a one-way ticket from Houston to Lambert-St. Louis International Airport is $93. The cheapest price for a return flight is $175. Keep in mind fares can change due to availability at the time of booking.

  • Book 8 months before you want to travel. After crunching the numbers on our calendar, this is how far you should book ahead to find cheap tickets from Houston to STL.

  • Schedule your trip for May. That's the cheapest month for tickets from Houston to Lambert-St. Louis International Airport. If your travel dates are flexible, use the 'Whole month' tool to see the lowest price across each month.

  • Locking in a cheap ticket from Houston to STL couldn't be easier with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know when the price has fallen.

  • Use the filters to tailor your flights from Houston to Lambert-St. Louis International Airport. Enter your ideal arrival and departure times, number of stops and airlines. You can also sort your results by 'Cheapest' to get the best deals.

The best time to fly from Houston to Lambert-St. Louis International Airport (STL)

  • It's time to work out your dates for your flight from Houston to Lambert-St. Louis International Airport. July is the busiest month to visit St Louis. If you want a more peaceful vibe, go in April.

  • Before locking in your flight from Houston to STL, think about the type of weather you enjoy. July is the warmest month in St Louis, with the temperature ranging from 63ºF to 91ºF.

  • January has average temperatures of between 18ºF and 45ºF. Search for cheap flights from Houston to Lambert-St. Louis International Airport sometime then if you like cooler conditions.

More about St Louis

Complete your St Louis trip with a car rental

  • Finding you a cheap flight from Houston to Lambert-St. Louis International Airport isn't the only thing we're good at. Browse our car rentals in St Louis and explore the city on your own terms. We find deals from trusted car rental providers and put them all in one place. Instantly compare rates and then book with no fees.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.