STL

$58 Find Cheap Flights from Houston to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Houston to St. Louis departing on 2/25. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to St. Louis, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$133
Overall average: $447
Frontier
Fri 2/6Mon 2/9
IAH - STL • 1 stop
Cheapest non-stop
$297
Typical prices: $323-$542
Southwest
Thu 3/12Tue 3/17
HOU - STL • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest offers two free checked bags for extra luggage.
Use MetroLink for quick access to downtown St. Louis.
Expert advice
Expert advice
Expert advice
Expert advice
Top routes
IAH
-
STL
Cheapest • 4% average savings
HOU
-
STL
Most popular
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Houston to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Houston to St. Louis 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 Houston to St. Louis

Fri, Feb 6 - Mon, Feb 9
Frontier Logo
8:18 pm - 11:11 am
IAH
-
STL
14h 53m
1 stop
Frontier Logo
5:42 pm - 6:28 pm
STL
-
IAH
24h 46m
1 stop
$133Frontier
Wed, Feb 18 - Sat, Feb 21
Frontier Logo
6:45 am - 3:53 pm
IAH
-
STL
9h 08m
1 stop
Frontier Logo
2:51 pm - 12:33 am
STL
-
IAH
9h 42m
1 stop
$138Frontier
Tue, Feb 17 - Fri, Feb 20
Frontier Logo
6:07 pm - 6:51 am
IAH
-
STL
12h 44m
1 stop
Frontier Logo
8:20 pm - 4:52 pm
STL
-
IAH
20h 32m
1 stop
$141Frontier
Wed, Feb 25 - Sun, Mar 1
Multiple Airlines Logo
8:45 am - 3:53 pm
IAH
-
STL
7h 08m
1 stop
Multiple Airlines Logo
10:11 pm - 5:54 am
STL
-
IAH
31h 43m
1 stop
$143Multiple Airlines
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
11:02 am - 11:59 pm
IAH
-
STL
12h 57m
1 stop
Frontier Logo
4:51 pm - 11:32 pm
STL
-
IAH
6h 41m
1 stop
$144Frontier
Fri, Feb 6 - Sat, Feb 7
Multiple Airlines Logo
8:18 pm - 11:11 am
IAH
-
STL
14h 53m
1 stop
Multiple Airlines Logo
8:22 pm - 10:33 am
STL
-
IAH
14h 11m
1 stop
$145Multiple Airlines
Thu, Mar 12 - Tue, Mar 17
Southwest Logo
10:05 pm - 12:05 am
HOU
-
STL
2h 00mnonstop
Southwest Logo
5:35 am - 7:50 am
STL
-
HOU
2h 15mnonstop
$297Southwest
Thu, Mar 12 - Tue, Mar 17
Southwest Logo
8:00 am - 12:50 pm
HOU
-
STL
4h 50m
1 stop
Southwest Logo
5:15 pm - 7:35 pm
STL
-
HOU
2h 20mnonstop
$307Southwest
Thu, Mar 12 - Tue, Mar 17
Southwest Logo
10:05 pm - 12:05 am
HOU
-
STL
2h 00mnonstop
Southwest Logo
2:25 pm - 8:35 pm
STL
-
HOU
6h 10m
2 stops
$312Southwest
Thu, Mar 5 - Sat, Mar 7
Southwest Logo
10:05 pm - 12:05 am
HOU
-
STL
2h 00mnonstop
Southwest Logo
7:15 am - 9:30 am
STL
-
HOU
2h 15mnonstop
$317Southwest
Booking Insights

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

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

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

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

The cheapest return flight from Houston to St. Louis costs $251 on the route between Houston George Bush Intcntl Airport (IAH) and St. Louis (STL). Over the past month, flights between Houston Hobby Airport (HOU) and St. Louis (STL) were, on average, 4% cheaper than other Houston-St. Louis routes. This is also the most popular route.

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

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

When flying from Houston to St. Louis, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to Houston, you’ll find the best rates on Fridays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston to St. Louis, 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 Houston to St. Louis is September, where tickets cost $249 (return) on average. On the other hand, the most expensive months are November and January, where the average cost of round-trip tickets is $433 and $395 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Houston to St. Louis, 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 Houston to St. Louis, you should book around 4 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from Houston to St. Louis

 
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$58
Flight from Houston George Bush Airport to St. Louis

When to book flights from Houston to St. Louis

Are your dates flexible? Find out the best times to travel from Houston to St. Louis 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 Houston to St. Louis

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

    In the last 3 days, the lowest price for a flight from Houston to St. Louis was $58 for a one-way ticket and $133 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Houston and on arrival in St. Louis.

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

    When flying out of Houston you will be using one of these airports: Houston Hobby or Houston George Bush Intcntl. You will be landing at Lambert-St Louis.

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

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

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

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

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

    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 Houston to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Houston 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 Houston to St. Louis?

    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 St. Louis with an airline and back to Houston with another airline.

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

    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 St. Louis from Houston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Houston to St. Louis?

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

Direct departures

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

Direct returns

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

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

 
See real verified KAYAK customer reviews for airlines flying from Houston to St. Louis. 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 Houston to St. Louis? 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 4268 reviews
7.5Entertainment
8.1Boarding
8.0Comfort
8.6Crew
7.0Food
Airline reviews

Everything went smoothly and we even arrived a little bit early.

10.0 ExcellentAmy, Jan 2026
DEN - STL
Read more Southwest reviews

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Southwest's seats are the least comfortable I have ever sat in.

I like flying first class, and United has a nice one

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Concern Regarding Significant Gate Delay and Jet Bridge Issue Dear Customer Relations Team, I am writing to express my disappointment with the experience I had on my recent flight AA 2414 on Sunday January 18, 2026. What should have been a routine departure turned into a frustrating and avoidable delay due to an issue with the jet bridge at the gate. As a result, the flight was delayed by approximately 90 minutes while multiple gate changes were attempted. The lack of clear communication during this period made the situation even more challenging. Passengers were left uncertain about the cause of the delay, the expected timeline, and the next steps. This not only disrupted travel plans but also created unnecessary stress for everyone on board. I understand that operational issues can arise, but a malfunctioning jet bridge and the resulting extended delay suggest an area where procedures or equipment maintenance may need attention. I hope you will review this incident to prevent similar disruptions in the future. I would appreciate acknowledgment of this concern and consideration of appropriate compensation for the inconvenience and lost time caused by this delay. Thank you for taking the time to review my experience. I look forward to hearing from you. Sincerely, Dion Dillard

They made me pay $40 to check a bag that was listed as free when I bought my ticket. Then before boarding they offered to check any bags free.

The seat cushions were very worn so they were extremely uncomfortable.

Delayed, no updates, had a rewards number but was not working

AA should improve their in air internet & entertainment options. Seems unreasonable to charge $20/hr and should have some form of free connections. The entertainment options are also pretty limited, movies are outdated and the series only show 3-5 episodes.

Flight delay and multiple gate changes including a change near boarding time to another terminal, which in DFW is a pain. Pre-boarding delay and also a further delay on the ground after boarding. About an hour and a half total delay.

Seats were much more cramped then on the 737. Narrower and rows closer together. Flight was absolutely packed and the plugs under the seats didn't work. Was forced to check my bag even though previous flight had no issue with it.

We never made it due to delays on both ends. Gate attendant said it was mechanical but the system said otherwise, so no compensation. That’s not right.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

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

Information on your arrival and departure airports