STL - IAH

$70 Find Cheap Flights from St. Louis to Houston George Bush Airport

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 George Bush Intcntl departing on 3/31. 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 George Bush Intcntl Airport

 
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
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$280
Typical prices: $297-$510
Frontier
Tue 3/17Mon 3/23
STL - IAH • 1 stop
Cheapest non-stop
$283
Typical prices: $305-$366
United Airlines
Sat 5/2Tue 5/5
STL - IAH • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Avoid peak hours at STL to reduce security wait times.
Use rideshare apps from IAH, except at Terminal E.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $281 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with United Airlines. Average duration is 2h 23m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Orlando (MCO)
Cheapest • Avg $241 (round-trip)
Dallas (DFW)
Shortest trip • 4h 30m (one-way)
Insights
Insights
Insights
Insights
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 36% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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 George Bush Intcntl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

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

Tue, Mar 17 - Mon, Mar 23
Frontier Logo
4:51 pm - 11:09 pm
STL
-
IAH
30h 18m
1 stop
Frontier Logo
9:03 pm - 10:32 am
IAH
-
STL
13h 29m
2 stops
$280Frontier
Fri, Apr 10 - Sat, Apr 11
Frontier Logo
12:22 pm - 9:14 pm
STL
-
IAH
8h 52m
1 stop
Frontier Logo
7:47 am - 11:25 pm
IAH
-
STL
15h 38m
1 stop
$281Frontier
Sun, Mar 22 - Fri, Mar 27
Frontier Logo
4:51 pm - 11:45 am
STL
-
IAH
18h 54m
2 stops
Frontier Logo
10:56 pm - 9:49 am
IAH
-
STL
10h 53m
1 stop
$282Frontier
Sat, May 2 - Tue, May 5
United Airlines Logo
4:44 pm - 7:05 pm
STL
-
IAH
2h 21mnonstop
United Airlines Logo
1:52 pm - 4:01 pm
IAH
-
STL
2h 09mnonstop
$283United Airlines
Wed, Apr 8 - Mon, Apr 13
Delta Logo
10:12 am - 3:51 pm
STL
-
IAH
5h 39m
1 stop
Delta Logo
6:46 pm - 11:36 pm
IAH
-
STL
4h 50m
1 stop
$285Delta
Thu, Mar 26 - Sun, Mar 29
Multiple Airlines Logo
11:21 am - 10:56 pm
STL
-
IAH
11h 35m
1 stop
Multiple Airlines Logo
9:15 pm - 10:32 am
IAH
-
STL
37h 17m
2 stops
$286Multiple Airlines
Sat, Apr 4 - Sun, Apr 12
Frontier Logo
8:16 pm - 8:38 am
STL
-
IAH
12h 22m
2 stops
Frontier Logo
10:56 pm - 9:48 am
IAH
-
STL
10h 52m
1 stop
$287Frontier
Sun, Mar 8 - Wed, Mar 11
Frontier Logo
4:51 pm - 7:29 am
STL
-
IAH
14h 38m
1 stop
Frontier Logo
6:00 pm - 7:17 am
IAH
-
STL
13h 17m
2 stops
$288Frontier
Thu, Mar 26 - Sun, Apr 12
Multiple Airlines Logo
11:21 am - 11:59 pm
STL
-
IAH
12h 38m
2 stops
Multiple Airlines Logo
10:56 pm - 9:48 am
IAH
-
STL
10h 52m
1 stop
$289Multiple Airlines
Wed, Mar 11 - Mon, Mar 16
Frontier Logo
4:51 pm - 11:09 pm
STL
-
IAH
6h 18m
1 stop
Frontier Logo
10:27 pm - 12:15 pm
IAH
-
STL
13h 48m
1 stop
$290Frontier
Booking Insights

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

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

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 George Bush Intcntl Airport departing in March.

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

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

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

What is the cheapest month to fly from St. Louis to Houston George Bush Intcntl Airport?

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 George Bush Intcntl Airport, 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 George Bush Intcntl Airport is January, where tickets cost $236 (return) on average. On the other hand, the most expensive months are February and April, where the average cost of round-trip tickets is $488 and $420 respectively.

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

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 $356, prices are generally cheapest when you fly direct.

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

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 George Bush Intcntl Airport, 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 George Bush Intcntl Airport, you should book around 3 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to George Bush Intcntl

 
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 seasonJuly
Cheapest flight$70
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly with an average 13% increase in price.
Flight from St. Louis to Houston George Bush Airport

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

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

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

    In the last 3 days, the lowest price for a flight from St. Louis to Houston George Bush Intcntl Airport was $70 for a one-way ticket and $279 for a round-trip.

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

    No

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

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Houston George Bush Airport, also known as Houston George Bush Intcntl.

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

    American Airlines, JetBlue, Alaska Airlines, and Delta offer inflight Wi-Fi service on the St. Louis to Houston George Bush Airport flight route.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Houston are United Airlines and American Airlines. With an average price for the route of $405 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $369 and an overall rating of 7.2.

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

    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 George Bush Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Houston George Bush Airport 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 George Bush Airport?

    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 George Bush Airport with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and IAH 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 St. Louis to Houston George Bush Airport?

    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 George Bush Airport from St. Louis 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 St. Louis to Houston George Bush Intcntl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $210 or less one-way and $449 or less round-trip.

Prefer to fly direct from St. Louis to Houston George Bush Airport?

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

Direct departures

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

Direct returns

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

Reviews of the top 3 airlines serving from St. Louis to George Bush Intcntl

 
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 George Bush Intcntl? 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 9347 reviews
6.6Food
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

Everything was great except for the boarding process. Everyone is lining up all at the same time and it’s hard to tell between the groups as they are way too large.

10.0 ExcellentElizabeth, Feb 2026
ATL - IAH
Read more United Airlines reviews

Everything was great except for the boarding process. Everyone is lining up all at the same time and it’s hard to tell between the groups as they are way too large.

Very old flight - time to retire it for newer airplanes

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Everything except the food and entertainment. It was a great experience though

Delayed, toilets did not flush, pilot parked to far away from Gate

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

United is an incompetent airline. They parked the plane on the tarmac for an hour after arriving because they “didn’t have a gate available” it was actually some sort of lie because as we de planed there were approximately 9 open and manned and empty gates that we walked past. Many people on the flight missed connections for the hour long sit on the tarmac. Utterly baffling and incompetent behavior from United flight ops.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

I am an AA flyer for a very long time... AA has yet to disappoint.

Arriving plane went to wrong gate. Flight Attendant was late. Was in no Hurry when he arrived. Flight was fine. Plane had to wait 20 minutes to get assigned a gate due to designated gate tied up. barely connected.. Boarded extremely late on final leg of trip.

See prior comment about how Kayak mishandled my reservation and delayed my arrival by 6 hours.

Generally good. Flight left on time and the seats are comfortable. Plenty of space in front if you in you choose a comfort plus seat, completely worth spending the extra money given the amount of hours the flight lasts. The food tastes good but I would say it’s a the amount is too little. The crew was friendly and efficient. There was a some turbulence at different points into the flight. American Airlines has good deals to NZ if you book with plenty of time before you plan on going.

I am very appreciative of the help provided to me by Dennis and Whitney. I had lost my phone at EWR airport and they were very kind in assisting me. This included advice on how to file a report and also helping me connect with family. The pilot was also great about keeping passengers updated on the flight progress with regular communications over the system.

The screens were inoperable for movies and such, but everything else was just fine

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

2 hour delay due to equipment failure. No updates via the app and airport screens (which continued to show a departure time in the past). AA eventually switched planes and the new plane was not catered or cleaned correctly.

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

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.

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

Information on your arrival and departure airports