$63 Find Cheap Flights from St. Louis to Houston

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 5/27. 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 Houston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Houston, 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 St. Louis to Houston, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$267
Typical prices: $415-$299
Southwest
Tue 5/26Tue 6/2
STL - HOU • Non-stop
Cheapest non-stop
$274
Typical prices: $534-$322
United Airlines
Wed 5/27Thu 5/28
STL - IAH • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest's two free checked bags save on fees.
Choose HOU for a faster ride to downtown Houston.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $267 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest and United Airlines. Average duration is 2h 15m
Direct flights
Direct flights
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+1
Direct flights
Direct flights
+1
Top routes
Cheapest
Most popular
Insights
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When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 44% compared to booking last minute.
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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

Tue, May 26 - Tue, Jun 2
Southwest Logo
5:15 am - 7:30 am
STL
-
HOU
2h 15mnonstop
Southwest Logo
11:00 am - 2:50 pm
HOU
-
STL
3h 50m
1 stop
$267Southwest
Sat, May 16 - Mon, May 18
Frontier Logo
8:08 pm - 1:44 pm
STL
-
IAH
17h 36m
1 stop
Frontier Logo
8:50 pm - 5:33 pm
IAH
-
STL
20h 43m
1 stop
$268Frontier
Sat, May 2 - Mon, May 4
Frontier Logo
8:17 pm - 12:48 am
STL
-
IAH
28h 31m
1 stop
Frontier Logo
10:01 pm - 6:06 pm
IAH
-
STL
20h 05m
1 stop
$270Frontier
Sun, May 3 - Sat, May 16
Frontier Logo
8:06 pm - 9:49 am
STL
-
IAH
13h 43m
1 stop
Frontier Logo
6:30 am - 7:23 pm
IAH
-
STL
12h 53m
1 stop
$271Frontier
Wed, May 27 - Thu, May 28
United Airlines Logo
8:35 am - 10:52 am
STL
-
IAH
2h 17mnonstop
United Airlines Logo
6:28 pm - 8:42 pm
IAH
-
STL
2h 14mnonstop
$274United Airlines
Tue, May 12 - Thu, May 14
Frontier Logo
6:51 pm - 1:44 pm
STL
-
IAH
18h 53m
2 stops
Frontier Logo
11:12 am - 4:54 pm
IAH
-
STL
5h 42m
1 stop
$275Frontier
Thu, May 21 - Sun, May 24
Multiple Airlines Logo
5:00 pm - 7:38 pm
STL
-
IAH
26h 38m
1 stop
Multiple Airlines Logo
2:20 pm - 8:55 am
IAH
-
STL
18h 35m
1 stop
$276Multiple Airlines
Tue, May 19 - Wed, May 20
Delta Logo
9:15 am - 4:09 pm
STL
-
HOU
6h 54m
1 stop
Delta Logo
10:27 am - 4:10 pm
HOU
-
STL
5h 43m
1 stop
$277Delta
Tue, May 19 - Wed, May 20
Delta Logo
7:05 am - 1:14 pm
STL
-
IAH
6h 09m
1 stop
Delta Logo
7:00 am - 12:20 pm
IAH
-
STL
5h 20m
1 stop
$277Delta
Tue, May 26 - Tue, Jun 2
Southwest Logo
5:15 am - 7:30 am
STL
-
HOU
2h 15mnonstop
Southwest Logo
3:40 pm - 8:00 pm
HOU
-
STL
4h 20m
1 stop
$280Southwest
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 May.

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 $291 on the route between St. Louis (STL) and Houston Hobby Airport (HOU). 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, Monday 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 August, where tickets cost $75 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $196 and $190 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 44% 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$63
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 3 days, the lowest price for a flight from St. Louis to Houston was $63 for a one-way ticket and $267 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 5 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 4314 reviews
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
8.6Crew
Airline reviews

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

4.0 OkayDavid, Apr 2026
COS - DAL
Read more Southwest reviews

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

The seat was not comfortable. 1D. My back was sore all night and the next day.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

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

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

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

Great flight but super high price. Glad it was a business trip and not personal

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

We purchase first class seats for the first time for multiples of standard economy ticket. There was no access to the club lounge and no priority boarding. The meal and the service once on the plane were superior and the seat was nicer, but not worth the price difference. I will be happy to seat in economy and spend the difference on more travel.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Everything was on time and service on the flight was great!

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

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.

Got home at 3am after deboarding the plane. No compensation offered by American

Flights on time w/o delays. However, my baggage was damaged. Ground crew, throws baggage from plane to the baggage carrier, carelessly.

Business class was very good, one of my best flights

American flight was diverted and delayed but app didn’t show that information so I wasn’t able to change my connection until the last min.

The plane was very creaky and lots of ringing. Plane was dirty and dingy. I couldn't hear the captain's announcements from the flight deck. Not sure if it was the captain or the audio equipment, but good thing there wasn't an emergency where we needed clear instructions. The overhead compartments were clearly full, but the flight crew allowed people to stand in the back with their carry on luggage. Then after everyone boarded, they had to go to the front to gate check their luggage because there was no room for their bags and then they returned to their seats...such a waste of time when clearly the overhead compartments were full when they originally boarded.

Air condition was not working for long both after boarding and also after landing ; unbearably hot and suffocating

Human interaction. Thought there would be more service-even a smile would have been nice.

They canceled my flight and never told me. There was no follow up email. I had to buy another ticket the day of.

It was a full Spirit experience. Got to witness police officers having to deboard a passenger and cost us about an hour of delay. Front seat was spacious and better than expected.

Bad airline to travel with my flight was delayed for more than 3 hours they act like it’s normal

flight delayed because of poor staffing and organization - confusion from gate agents and flight attendant supervisors scheduling a missing flight attendant. flight delay 1 hr 30 min

My flight was delayed by over an hour and the turbulance was horrible.

This flight cancelled. I am in the airport right now and my kids sleep on the floor. We are waiting for information in the line 4 hours and rude woman from spirit airline offers us flight to Austin on 23 February. No water no food offer. The offer to book hotel and they will refund 150$. The nearest hotel 450$ per night. So I got flight to San Antonio 02/22 at 7am. I hate this company, they are rude and no empathy. So many people with kids were there. And I don’t sleep and it is cold here. I don’t have warm clothes for me and my kids. And I don’t have money for transport from San Antonio to my Austin.

The flight was delayed over an hour which got us into DFW at approximately 2:20 am

Terrible. Spirit cancelled the flight with 3 hours notice and were absolutely no help getting another flight. Had to make my own reservation on another airline and arrived in Dallas 12 hours later.

They cancelled the flight due to crew unavailability. The next day they cancelled the flight again.

That gate is like a ducking shelter at Newark No where to sit Outlets that don’t work Bathrooms that are dirty

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

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

Information on your arrival and departure airports