STL

$60 Find Cheap Flights from Houston to St. Louis - 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 Houston to St. Louis departing on 9/8. 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

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Everything you should know

Cheapest round-trip
$124
Typical prices: $266-$378
Frontier
Wed 10/21Sat 10/24
IAH - STL • 1 stop
Cheapest non-stop
$217
Typical prices: $231-$625
United Airlines
Tue 9/1Tue 9/1
IAH - STL • Non-stop
Top airlines
Cheapest • from $124 (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 06m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 5% 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 49% compared to booking last minute.
Insights
Insights
Insights
Insights
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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

Wed, Oct 21 - Sat, Oct 24
Frontier Logo
8:44 pm - 9:40 am
IAH
-
STL
12h 56m
1 stop
Frontier Logo
10:35 am - 10:06 pm
STL
-
IAH
11h 31m
1 stop
$124Frontier
Wed, Aug 26 - Fri, Aug 28
Frontier Logo
4:32 pm - 5:22 pm
IAH
-
STL
24h 50m
1 stop
Frontier Logo
6:17 pm - 7:20 am
STL
-
IAH
13h 03m
1 stop
$130Frontier
Mon, Aug 24 - Mon, Aug 31
Frontier Logo
11:32 am - 5:22 pm
IAH
-
STL
5h 50m
1 stop
Frontier Logo
6:17 pm - 7:20 am
STL
-
IAH
13h 03m
1 stop
$130Frontier
Tue, Sep 1 - Tue, Sep 1
United Airlines Logo
8:00 am - 10:10 am
IAH
-
STL
2h 10mnonstop
United Airlines Logo
3:13 pm - 5:25 pm
STL
-
IAH
2h 12mnonstop
$217United Airlines
Sat, Oct 10 - Wed, Oct 14
United Airlines Logo
11:58 am - 2:10 pm
IAH
-
STL
2h 12mnonstop
United Airlines Logo
6:15 am - 8:27 am
STL
-
IAH
2h 12mnonstop
$217United Airlines
Wed, Sep 23 - Sat, Sep 26
Southwest Logo
5:55 pm - 7:55 pm
HOU
-
STL
2h 00mnonstop
Southwest Logo
8:25 am - 10:25 am
STL
-
HOU
2h 00mnonstop
$217Southwest
Thu, Oct 8 - Sat, Oct 10
Southwest Logo
9:00 am - 11:00 am
HOU
-
STL
2h 00mnonstop
Southwest Logo
5:20 am - 7:25 am
STL
-
HOU
2h 05mnonstop
$217Southwest
Tue, Aug 25 - Thu, Aug 27
United Airlines Logo
3:52 pm - 6:04 pm
IAH
-
STL
2h 12mnonstop
United Airlines Logo
11:15 am - 1:32 pm
STL
-
IAH
2h 17mnonstop
$217United Airlines
Tue, Aug 25 - Thu, Aug 27
American Airlines Logo
5:00 am - 9:24 am
IAH
-
STL
4h 24m
1 stop
American Airlines Logo
8:36 am - 3:31 pm
STL
-
IAH
6h 55m
1 stop
$237American Airlines
Tue, Oct 13 - Sat, Oct 17
American Airlines Logo
6:00 am - 12:03 pm
IAH
-
STL
6h 03m
1 stop
American Airlines Logo
7:29 am - 1:26 pm
STL
-
IAH
5h 57m
1 stop
$237American Airlines
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.

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

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

Flight prices are below average for this route right now.

Flights to St. Louis from Houston usually cost between $234 and $395 in October.
The lowest price found in the past 5 days was $124 on Frontier (Oct 21-Oct 24).

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 $231 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, 5% 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 Wednesday and avoid Mondays 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 $283 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $530 and $488 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 49% 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 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

$60
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 5 days, the lowest price for a flight from Houston to St. Louis was $60 for a one-way ticket and $124 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?

    Star Alliance is the only airline alliance operating flights between Houston and St. Louis.

  • 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 3 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 4229 reviews
7.5Entertainment
7.0Food
8.0Comfort
8.1Boarding
8.6Crew
Airline reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

2.0 MediocreStuart, Mar 2026
HOU - STL
Read more Southwest reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

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

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.

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

For my birthday trip this was my second time ever flying, this trip was the best.

Crew was great flight was great baggage claim was a failure. It took over 1 hour for bags to arrive. Poor communication poor effort when I spoke to the supervisor about the delay

Everything was great except the food. The pretzels are really crappy.

Because of storms in St Louis, plane was diverted to Kansas City. After about 1 hour stay went back to st Louis to finally reach distanation. Made for long day. But southwest took care of us. Can't fight mother nature

Worse experience especially since there were delays and unreasonable accommodations made

The experience with United Airlines was excellent; however, the experience with Houston Intercontinental Airport (IAH) was horrible. Although our flight departed from Terminal B, we had to go through security in Terminal C and then get on a train for travel to Terminal B. Additionally, there was significant walking required to get to the boarding location.

Unbelievably smooth boarding at IAH and the flight attendants were top notch.

We flew business fares. Was amazing. However, the check in didn't offer business fares preboarding which is less hectic. 8/10 due to this. Staff compared to Canadian carriers go above and beyond. Would gladly fly United again.

Comfortable seating POS to IAH. Food options were satisfactory. Good seat from IAH to ANC. Food options could be better.

Always pretty good as far as I see it. Staff was friendly and process was quick to get on and off.

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

Airport terminal was outdated, flight was on a small jet with no wifi

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.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

We were delayed three times ,and that destroyed my plans, and reservations

The reps working at the airport counter were dumber than a second coat of paint.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Airline changed the gate from Terminal A to Terminal D which is quite far and only sent a text message few minutes before boarding. Around 50 people missed their flight and as plane didn’t wait for them.

Bad experience… crew are extremely strict with personal bags… they overcharge me coz my bag was one inch H

Well I mean u get what u pay for so 🤷‍♂️

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Plane was clean but they do not allow bag drop until 1 hour before flight. Just encouraging late fees and other issues. The worst I have experienced. Total hostage situation, pay or you miss your flight.

Everything was good, and most importantly on time. They have been extremely tardy in some of my flights

The experience was terrible. The flight boarded late, then after leaving the gate the plane had had to return to the gate for fuel. After 2 hours on the plane, the flight was canceled. The reasons given for the cancelation didn't sound truthful. and different reasons were given. My 15 year old daughter was flying alone on this flight. When they all disembarked the plane she kept asking the crew what she was supposed to do. No one even gave her the courtesy of a response. No one. It took another 4.75 hrs to be out of customs and baggage. She was re-booked the following day. That flight departed 2 hours late. After all of that, they offered a measly $100 flight voucher with an expiry date of 3 months! All in all a terrible experience. We won't be using Frontier again in the future.

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

Information on your arrival and departure airports