$61 Find Cheap Flights from St. Louis to Houston - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Houston departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$128
Typical prices: $262-$467
Frontier
Wed 9/9Wed 9/16
STL - IAH • 1 stop
Cheapest non-stop
$207
Typical prices: $251-$410
Southwest
Thu 9/17Tue 9/22
STL - HOU • Non-stop
Top airlines
Cheapest • from $128 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest and United Airlines. Average duration is 2h 07m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 9% average savings
Most popular
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 50% compared to booking last minute.
Insights
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Flight Deals
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Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Houston that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Houston

Wed, Sep 9 - Wed, Sep 16
Frontier Logo
2:29 pm - 10:30 pm
STL
-
IAH
8h 01m
1 stop
Frontier Logo
6:28 am - 1:10 pm
IAH
-
STL
6h 42m
1 stop
$128Frontier
Wed, Sep 16 - Mon, Sep 21
Frontier Logo
10:35 am - 10:06 pm
STL
-
IAH
11h 31m
1 stop
Frontier Logo
8:44 pm - 9:40 am
IAH
-
STL
12h 56m
1 stop
$130Frontier
Thu, Sep 17 - Tue, Sep 22
Southwest Logo
8:55 pm - 11:00 pm
STL
-
HOU
2h 05mnonstop
Southwest Logo
8:00 am - 10:05 am
HOU
-
STL
2h 05mnonstop
$207Southwest
Tue, Sep 8 - Tue, Sep 15
Southwest Logo
6:00 am - 8:00 am
STL
-
HOU
2h 00mnonstop
Southwest Logo
7:35 am - 9:35 am
HOU
-
STL
2h 00mnonstop
$217Southwest
Wed, Dec 2 - Sat, Dec 5
United Airlines Logo
6:15 am - 8:35 am
STL
-
IAH
2h 20mnonstop
United Airlines Logo
2:40 pm - 4:44 pm
IAH
-
STL
2h 04mnonstop
$217United Airlines
Mon, Dec 21 - Thu, Dec 31
United Airlines Logo
6:15 am - 8:35 am
STL
-
IAH
2h 20mnonstop
United Airlines Logo
7:40 am - 9:37 am
IAH
-
STL
1h 57mnonstop
$217United Airlines
Sat, Oct 31 - Sat, Oct 31
American Airlines Logo
5:40 am - 11:11 am
STL
-
HOU
5h 31m
1 stop
American Airlines Logo
5:06 pm - 9:59 pm
HOU
-
STL
4h 53m
1 stop
$237American Airlines
Thu, Sep 3 - Mon, Sep 7
American Airlines Logo
8:36 am - 3:31 pm
STL
-
IAH
6h 55m
1 stop
American Airlines Logo
5:00 am - 9:24 am
IAH
-
STL
4h 24m
1 stop
$237American Airlines
Sat, Oct 17 - Mon, Oct 19
Delta Logo
5:28 pm - 11:09 pm
STL
-
HOU
5h 41m
1 stop
Delta Logo
5:28 pm - 11:48 pm
HOU
-
STL
6h 20m
1 stop
$237Delta
Sat, Oct 17 - Mon, Oct 19
Delta Logo
5:38 pm - 11:03 pm
STL
-
HOU
5h 25m
1 stop
Delta Logo
5:28 pm - 11:54 pm
HOU
-
STL
6h 26m
1 stop
$237Delta
Booking Insights

KAYAK's insights & trends for St. Louis to Houston flights

Get data-powered insights and trends into flights from St. Louis to Houston to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Houston?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Houston departing in September.

Flight prices are below average for this route right now.

Flights to Houston from St. Louis usually cost between $257 and $423 in September.
The lowest price found in the past 5 days was $128 on Frontier (Sep 9-Sep 16).

What is the cheapest St. Louis to Houston flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from St. Louis to Houston costs $285 on the route between St. Louis (STL) and Houston Hobby Airport (HOU). Over the past month, this route was, on average, 9% cheaper than other St. Louis-Houston routes. The most popular route is between St. Louis (STL) and Houston George Bush Intcntl Airport (IAH).

What’s the cheapest day of the week to fly from St. Louis to Houston?

The average price of all round-trip flights from St. Louis to Houston clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Houston on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from St. Louis to Houston. For your return ticket, we recommend flying on a Wednesday and avoiding Mondays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Houston, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Houston is September, where tickets cost $310 (return) on average. On the other hand, the most expensive months are February and July, where the average cost of round-trip tickets is $452 and $438 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Houston, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Houston, you should book around 4 weeks before departure, which saves you about 50% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to Houston

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
John Walton

John Walton

Expert on IAH

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL and HOU

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Cheapest flight

$61
Flight from St. Louis to Houston George Bush Airport

When to book flights from St. Louis to Houston

Are your dates flexible? Find out the best times to travel from St. Louis to Houston based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Houston

  • What is the cheapest flight from St. Louis to Houston?

    In the last 5 days, the lowest price for a flight from St. Louis to Houston was $61 for a one-way ticket and $128 for a round-trip.

  • Do I need a passport to fly between St. Louis and Houston?

    A passport is required to fly from St. Louis to Houston.

  • Which airports will I be using when flying from St. Louis to Houston?

    St. Louis is served by only 1 airport and there are 2 airports in Houston. You will leave St. Louis from Lambert-St Louis and you will be arriving in Houston at one of these airports: Houston Hobby or Houston George Bush Intcntl.

  • Which aircraft models fly most regularly from St. Louis to Houston?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Houston?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Houston, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from St. Louis to Houston?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Houston.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Houston?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Houston from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Houston?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Houston with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Houston?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Houston from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from St. Louis to Houston?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Houston.
Find which airlines fly direct from Lambert-St Louis Airport to Houston, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Houston

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Direct returns

Houston to Lambert-St Louis

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Reviews of the top 4 airlines serving from St. Louis to Houston

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Houston. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Houston? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4229 reviews
7.0Food
8.0Comfort
7.5Entertainment
8.6Crew
8.1Boarding
Airline reviews

Snacks are always pretzels. Why can't you also offer peanuts ?

6.0 GoodAnonymous, Mar 2026
STL - HOU
Read more Southwest reviews

Snacks are always pretzels. Why can't you also offer peanuts ?

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Very good. Sad to learn Southwest is going start to charge for bags

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.

Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.

Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!

Everything went smoothly and the plane wasn’t full. It was delayed though. The delay was increased due to a crew change which was frustrating.

Love Southwest! Always a good trip with a happy crew who goes out of their way to be kind and fun.

friendly staff for the most part. they thought we were going to have bad turbulence so no drink service. there wasn't any turbulence. Iwish you had a choice of snacks

Wonderful flight! The crew was good, check-in was good and orderly and the flight was uneventful and good.

The international portion was good. Food and beverage options were good. The sustainable wooden eatery was less than desirable. Your Star Alliance partner ANA provided real silverware. I'm 6'3" & 198 lbs and felt cramped in the exit row. How can that be? Flight attendant all had a pleasant disposition which is always good.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

Boarded from a very small gate at LAX. Staff at gate had us line up, then waited 25 minutes to board without a word of explanation. Plane arrived on time then waited 20 minutes for a plane to vacate our gate. Majority of bags arrived after 15 minutes but it took an hour for a small number of remaining bags to be off-loaded despite my “priority” bag tag.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Flight was canceled 12 hours before take-off due to “weather”

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

First time flying internationally with AA and probably my last. Not military friendly at all. Didn't allow free checked bag for military family members (dependents) on orders like other airlines. We were charged $100 for baggage weight overage (5 lbs!)even though we had military orders allowing us extra.. Didn’t allow military members to board early. Inefficient and long wait time to board. Seats are smaller and more uncomfortable than other airlines.. no drink service for over 7 hrs of flight! After initial meal was served, the crew never offered a snack or drinks until the breakfast's was served 1 1/2 hrs before landing. Overall expensive and poor experience for the entire flight.

Boarding process was good. I was assigned the most rear (non-reclining) seat in both directions, which wasn't great.

Terrible. Delayed my family flight for several hours affecting family plans

Flight was delayed and then my second leg was completely canceled. Had to get a refund

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

My flight was canceled I was promised a reginf still not received.

The worst service , the agents from the counter are really bad . Poor customer service . They didnt help me to get in the flight . I was on line when they close the flight without telling and I couldn’t board the plane . I will like to get my money back ey back because it was their fault. Really bad management , bad manners, bad additud

I fly Frontier often and generally don't have any issues. For some reason, the Denver to Houston's George Bush Intercontinental (IAH) flight always needs to wait on the tarmac in Houston because a gate is not available after landing. I've been stuck for as little as 15 minutes and as much as a little over an hour. I know only fly the Frontier Denver to IAH route when there is not an available flight to Houston Hobby (HOU).

Terrible Y lost my connection to Mexico, nobody of your company help me And y pay a lot of money for my baggage Until now I continue in the Houston airport I vneed you return my money

Everything was good, 20/30 minutes late waiting on a crew member. It’s hard to keep employees. Or serious employees I know. I remember one flight from Houston of Frontiers was almost 18 hours late. And another 4 hours late very poor. But I would rather be late and safe than the on the news. Thank you.

I have come to accept Frontier as an absolute no-frills airline, paying for everything I want. A 4.5-hour flight should provide me with a complimentary beverage—rather, $4.9x for a soda. Or a bottle of water ought to be extended at no cost. 4 beers are on the menu, but only 1 type of beer is available (at $9.95). Also, so many restrictions to using a voucher from Barclay‘s Credit Card. Finally, try to reach a live agent for Frontier- impossible!

Good - Leg spar, cleanliness, and on time performance. Bad - No snacks and entertainment.

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

Information on your arrival and departure airports