IAH - STL

$117 Find Cheap Flights from Houston George Bush Airport 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 George Bush Intcntl to St. Louis departing on 11/18. 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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Everything you should know

Cheapest round-trip
$295
Typical prices: $517-$384
Frontier
Mon 6/15Thu 6/18
IAH - STL • 1 stop
Cheapest non-stop
$298
Typical prices: $625-$227
United Airlines
Thu 9/10Wed 9/16
IAH - STL • Non-stop
Top airlines
Cheapest • from $295 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 2h 13m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $202 (round-trip)
Shortest trip • 4h 09m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 52% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 36% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
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Flight Deals

Cheap Flights from George Bush Intcntl to St. Louis (IAH-STL)

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

Mon, Jun 15 - Thu, Jun 18
Frontier Logo
8:53 pm - 6:51 pm
IAH
-
STL
21h 58m
1 stop
Frontier Logo
7:38 pm - 9:13 pm
STL
-
IAH
25h 35m
1 stop
$295Frontier
Tue, Jul 21 - Tue, Jul 21
Delta Logo
8:05 am - 2:48 pm
IAH
-
STL
6h 43m
1 stop
Delta Logo
6:58 pm - 11:57 pm
STL
-
IAH
4h 59m
1 stop
$297Delta
Sat, Jun 27 - Sun, Jun 28
Frontier Logo
6:30 am - 6:53 pm
IAH
-
STL
12h 23m
1 stop
Frontier Logo
7:38 pm - 9:13 pm
STL
-
IAH
25h 35m
1 stop
$298Frontier
Thu, Jun 11 - Wed, Jun 17
Frontier Logo
11:12 am - 5:30 pm
IAH
-
STL
6h 18m
1 stop
Frontier Logo
5:06 pm - 10:48 pm
STL
-
IAH
5h 42m
1 stop
$300Frontier
Fri, Jun 19 - Tue, Jun 23
Frontier Logo
8:55 pm - 8:52 am
IAH
-
STL
11h 57m
1 stop
Frontier Logo
6:31 pm - 7:23 am
STL
-
IAH
12h 52m
1 stop
$303Frontier
Fri, Jun 26 - Sun, Jun 28
Frontier Logo
7:24 pm - 11:49 pm
IAH
-
STL
28h 25m
1 stop
Frontier Logo
4:17 pm - 8:47 am
STL
-
IAH
16h 30m
1 stop
$304Frontier
Wed, Jun 10 - Mon, Jun 15
Frontier Logo
1:07 pm - 11:49 pm
IAH
-
STL
10h 42m
1 stop
Frontier Logo
5:06 pm - 10:48 pm
STL
-
IAH
5h 42m
1 stop
$305Frontier
Fri, Jun 26 - Sun, Jun 28
Frontier Logo
8:55 pm - 8:52 am
IAH
-
STL
11h 57m
1 stop
Frontier Logo
7:38 pm - 9:13 pm
STL
-
IAH
25h 35m
1 stop
$307Frontier
Wed, Jun 17 - Mon, Jun 22
Frontier Logo
1:07 pm - 11:49 pm
IAH
-
STL
10h 42m
1 stop
Frontier Logo
5:06 pm - 10:48 pm
STL
-
IAH
5h 42m
1 stop
$313Frontier
Thu, Jun 18 - Fri, Jun 19
Frontier Logo
6:30 am - 5:30 pm
IAH
-
STL
11h 00m
1 stop
Frontier Logo
5:06 pm - 10:48 pm
STL
-
IAH
5h 42m
1 stop
$318Frontier
Booking Insights

KAYAK's insights & trends for George Bush Intcntl to St. Louis flights

Get data-powered insights and trends into flights from George Bush Intcntl 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 George Bush Intcntl Airport 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 George Bush Intcntl Airport to St. Louis departing in June.

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

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

For Houston George Bush Airport to St. Louis, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from St. Louis back to Houston George Bush Airport, the best deals are generally found on Friday, with Monday being the most expensive.

What is the cheapest month to fly from Houston George Bush Intcntl Airport 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 George Bush Intcntl Airport 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 George Bush Intcntl Airport to St. Louis is September, where tickets cost $281 (return) on average. On the other hand, the most expensive months are April and March, where the average cost of round-trip tickets is $741 and $673 respectively.

Can I save money by flying with a layover from Houston George Bush Intcntl Airport to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $296, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Houston George Bush Intcntl Airport 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 George Bush Intcntl Airport 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 George Bush Intcntl Airport to St. Louis, you should book around 5 weeks before departure, which saves you about 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Expert advice

Expert advice for your flight from George Bush Intcntl 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

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

Low seasonDecember
Cheapest flight$117
Most popular time to fly with an average 68% increase in price.
Flight from Houston George Bush Airport to St. Louis

When to book flights from George Bush Intcntl to St. Louis

Are your dates flexible? Find out the best times to travel from George Bush Intcntl 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 Houston George Bush Airport to St. Louis flights

  • What are the transport options from STL to downtown St. Louis?

    Hop on the RED line MetroLink light rail from either Exit Door 1 of Terminal 1 or the parking garage in Terminal 2 to St. Louis Proper. Alternatively, Go BEST Express links the airport to various destinations. They offer door-to-door and shared-ride shuttle services. Metered taxis are accessible from Terminal 2, close to Exit Door 12, and Terminal 1, adjacent to Exit Door 14.

  • Are there facilities for passengers towing along with their kids at STL?

    Are you traveling with children to St. Louis? Since children sometimes become agitated in airports, why not make a pit stop at St. Louis International's Play Port close to gate C3? The Play Port is a great spot for kids to blow off steam after their trip. It has transportation-themed play spaces such as an air traffic control tower, a miniature plane, and a MetroLink train.

  • What are the dining options at St. Louis Lambert International Airport (STL)?

    Visitors to STL who are hungry have several options. Grounded in Concourse A offers gourmet burgers and more. Do you prefer Artisan pizza? Pay a visit to Pizza Studio in Concourse A. Three Kings Public House, Schlafly, and Missouri Vineyards are your best bets for local cuisines and drinks. They provide a wide range of regional fare and drinks that are bound to impress.

  • What is there to do at IAH?

    If your flight from IAH to STL is delayed, why don’t you take a stroll in IAH and take in the numerous artworks by Texan-based artists displayed at the airport? These exhibits range from sculptures to photographs and can be found at Terminal D, Levels M, 2, and 1, Terminal A, Levels 1 and 2, and Terminal E's Levels 1 and 2.

  • What is the cheapest flight from Houston George Bush Intcntl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from Houston George Bush Intcntl Airport to St. Louis was $117 for a one-way ticket and $295 for a round-trip.

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

    A passport is not required to fly from Houston George Bush Airport to St. Louis.

  • Which airlines offer Wi-Fi service onboard planes from Houston George Bush Airport to St. Louis?

    Only JetBlue offers inflight Wi-Fi service on the Houston George Bush Airport to St. Louis flight route.

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

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Houston George Bush Airport to St. Louis flight route.

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

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

  • On which days can I fly direct from Houston George Bush Airport to St. Louis?

    There are nonstop flights from Houston George Bush Airport to St. Louis on a daily basis.

  • Which is the best airline for flights from Houston to St. Louis, United Airlines or Frontier?

    The two airlines most popular with KAYAK users for flights from Houston to St. Louis are United Airlines and Frontier. With an average price for the route of $512 and an overall rating of 7.4, United Airlines is the most popular choice. Frontier is also a great choice for the route, with an average price of $224 and an overall rating of 5.6.

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Houston George Bush Airport 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 George Bush Airport 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 George Bush Airport 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 George Bush Airport with another airline. Booking your flights between Houston George Bush Airport and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Houston George Bush Airport 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 George Bush Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Houston George Bush Intcntl Airport to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $225 or less one-way and $417 or less round-trip.
  • If you need to loosen up before your flight from Houston George Bush Airport (IAH), use one of the massage chairs at Terminals A, B, C, D, and E. A 5-minute deep-tissue massage is available for a modest fee. You can also indulge yourself at the Xpress Spa in Terminal A. Spa services include massages, facials, manicures, and pedicures.
  • Passengers bringing their four-legged buddy to IAH will be glad to hear that pet relief zones are both within and outside the primary terminals. These include locations near Gate B1 in Terminal B and Gate E12 in Terminal E.
  • If you are booking a flight from Houston George Bush Airport to St. Louis (STL), you are most likely to fly into STL. The airport features two terminals (1 and 2) with five concourses, A-E. STL offers a complimentary shuttle service that operates every 8-12min between the two terminals, stopping at the BusPort in between terminal stops. Shuttles depart from Exit Door 12 of either terminal.
  • Many passengers like to lounge as they wait for their plane to depart. The United Club has locations in Terminals A, B, C, and E, and the KLM Lounge and Centurion Lounge in Terminal D of IAH. All are easily accessible on paid entry.
  • Single-stop flights from George Bush Intercontinental Airport (IAH) to St. Louis are eco-friendlier than direct flights. Approximately 1,017 kg of carbon is emitted per person on this route. American Airlines is the most-sustainable airline on this route, which releases 53% less carbon.

Prefer to fly direct from Houston George Bush Airport 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 George Bush Intcntl to Lambert-St Louis.
Find which airlines fly direct from Houston George Bush Intcntl Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Houston George Bush Intcntl to Lambert-St Louis

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Lambert-St Louis to Houston George Bush Intcntl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top airlines flying from George Bush Intcntl 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 George Bush Intcntl 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.
7.4
United AirlinesOverall score based on 9751 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
8.1Crew
Airline reviews

I felt scammed. The priced advertised was different than what I paid. I paid the whole some online. I then got a call 20 minutes later saying I need to paid 70 more person. She said the price online is not the guaranteed price.

8.0 ExcellentAnonymous, May 2026
IAH - YUL
Read more United Airlines reviews

I felt scammed. The priced advertised was different than what I paid. I paid the whole some online. I then got a call 20 minutes later saying I need to paid 70 more person. She said the price online is not the guaranteed price.

We had a delay, but thankfully I made it to my connection. Overall it went smooth

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

It's a long flight and I would have liked better snacks between lunch and the arrival meal. It's fine to have fruit and nuts but I really don't like ramen because it's salty junk soup. I'd suggest sandwiches. They're not expensive nor are they hard to store for a long flight. The FA's had a couple of big services and they were super busy preparing, executing and then cleaning up. Then they disappeared.

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Didn't make the flight because the first leg of my flight was canceled and the next leg was already booked.

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

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.

Everything you need to know for your flight from George Bush Intcntl to St. Louis

Information on your arrival and departure airports