St. Louis

$70+ Cheap flights from Houston to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — STL
May 3 — May 101
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Cheapflights Tip: The best prices from Houston to Lambert-St Louis are usually found in September or October, booked 86 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Houston to St. Louis

Cheapest flights from Houston to St. Louis
Explore the most affordable flight options available from Houston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:15 am
IAH
-
STL
1 stop12h 17m
Frontier
Mon 4/278:17 pm
STL
-
IAH
1 stop27h 39m
Frontier
Deal found 4/3$133
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:35 pm
IAH
-
STL
1 stop18h 15m
Multiple Airlines
Wed 4/298:23 pm
STL
-
IAH
1 stop12h 28m
Multiple Airlines
Deal found 4/2$137
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:31 pm
IAH
-
STL
1 stop24h 42m
Frontier
Sat 4/258:17 pm
STL
-
IAH
1 stop12h 32m
Frontier
Deal found 3/31$140
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:31 pm
IAH
-
STL
1 stop24h 42m
Frontier
Mon 4/278:17 pm
STL
-
IAH
1 stop27h 39m
Frontier
Deal found 3/31$141
This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:05 am
IAH
-
STL
1 stop28h 21m
Frontier
Wed 5/65:27 pm
STL
-
IAH
1 stop5h 23m
Frontier
Deal found 4/1$146
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:50 pm
IAH
-
STL
1 stop20h 04m
Frontier
Mon 5/185:27 pm
STL
-
IAH
1 stop21h 31m
Frontier
Deal found 3/31$147
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:35 pm
IAH
-
STL
1 stop18h 15m
Multiple Airlines
Thu 4/3011:21 am
STL
-
IAH
1 stop5h 58m
Multiple Airlines
Deal found 4/2$149
This CheapOair deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:31 pm
IAH
-
STL
1 stop24h 42m
Frontier
Tue 4/284:59 pm
STL
-
IAH
1 stop15h 39m
Frontier
Deal found 3/31$151
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:14 pm
IAH
-
STL
1 stop16h 16m
Frontier
Thu 4/3011:21 am
STL
-
IAH
1 stop5h 58m
Frontier
Deal found 4/2$152
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:15 am
IAH
-
STL
1 stop12h 17m
Frontier
Wed 4/298:23 pm
STL
-
IAH
1 stop12h 28m
Frontier
Deal found 4/2$153
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1812:37 pm
IAH
-
STL
1 stop6h 55m
Frontier
Mon 4/208:23 pm
STL
-
IAH
1 stop20h 31m
Frontier
Deal found 3/29$155
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:35 pm
IAH
-
STL
1 stop18h 15m
Multiple Airlines
Sat 5/28:23 pm
STL
-
IAH
1 stop12h 28m
Multiple Airlines
Deal found 4/2$156

Find flight deals from Houston to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2026.

Round-trip from

$133
(Kiwi.com)

One-way from

$70
(Frontier)

Popular in

March

Cheapest in

September

Average price

$297
From Houston to Lambert-St Louis
One-way flight from Houston to Lambert-St Louis
Highest demand for flights based on searches. 6% potential increase in price ($24 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in April 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2026.
Use the filters below to find and compare flights from Houston to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 5/13

8:15 pm-10:20 pm

Nonstop2h 05m

Lambert-St Louis

Sat 5/16

2:10 pm-7:40 pm

1 stop5h 30m

$284
Quickest round-trip

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 4/20

9:55 pm-11:55 pm

Nonstop2h 00m

Lambert-St Louis

Thu 4/23

5:40 am-7:50 am

Nonstop2h 10m

$291

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 5/13

8:23 pm-10:30 pm

Nonstop2h 07m

Lambert-St Louis

Fri 5/15

6:00 am-8:18 am

Nonstop2h 18m

$305

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 4/23

6:00 am-11:56 am

1 stop5h 56m

Lambert-St Louis

Mon 4/27

4:41 pm-11:07 pm

1 stop6h 26m

$311

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 5/12

3:40 pm-8:00 pm

1 stop4h 20m

Lambert-St Louis

Fri 5/15

9:45 pm-11:55 pm

Nonstop2h 10m

$311

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 5/13

3:40 pm-8:00 pm

1 stop4h 20m

Lambert-St Louis

Fri 5/15

5:40 am-7:50 am

Nonstop2h 10m

$311

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Fri 5/1

10:35 am-2:55 pm

1 stop4h 20m

Lambert-St Louis

Mon 5/4

7:15 pm-9:25 pm

Nonstop2h 10m

$328

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 5/19

7:25 am-9:30 am

Nonstop2h 05m

Lambert-St Louis

Thu 5/21

6:14 am-8:31 am

Nonstop2h 17m

$336

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 5/13

8:23 pm-10:30 pm

Nonstop2h 07m

Lambert-St Louis

Sun 5/17

6:00 am-8:18 am

Nonstop2h 18m

$336

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 5/13

10:25 am-12:25 pm

Nonstop2h 00m

Lambert-St Louis

Sun 5/17

5:25 am-7:35 am

Nonstop2h 10m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 41 resultsSorted by cheapest first
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Best time to book a flight from Houston to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Houston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Houston to St. Louis. Price data was last updated on April 2, 2026.

Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Houston to St. Louis?

Currently, October is the cheapest month in which you can book a flight from Houston to St. Louis (average of $117). Flying from Houston to St. Louis in November is currently the most expensive (average of $241). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from HOU to STL?

Find hourly flight availability from Houston to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2026.

One of the essential ways to save on airfare from Houston to St. Louis is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 17% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Houston to St. Louis. Price data was last updated on March 28, 2026.

Travelers seeking maximum savings on their Houston to St. Louis flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Houston to St. Louis?

The best insider tips for Houston to St. Louis flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Houston to St. Louis trip
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Taryn White

Taryn White

Expert on STL

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Scott Laird

Scott Laird

Expert on HOU

Originally from Anchorage, Alaska, Scott is a frequent contributor to Fodor’s Travel Guide, Conde Nast Traveler, TravelAge West, and TravelPulse. He holds a Bachelor of Science in Organizational Management from Alaska Pacific University and a Master of Science in Airline Management from Embry-Riddle Aeronautical University, and has worked in the airline and hotel industries and as a travel consultant.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated April 3, 2026.
Peruse reviews from past customers who have flown with Southwest,United Airlines, andAmerican Airlines from Houston to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Houston to St. Louis Travel Guide

St. Louis Lambert International Airport is located 14 miles from the downtown district in St. Louis. You’ll sometimes see it listed as Lambert Field. This airport is the busiest and the biggest one in the state of Missouri. There is a second airport in the city or located close to the city but the majority of flights arrive at Lambert. There is a connected railway though if it’s needed for a traveler to make it to the other airport.

Related info for your journey

Find useful and relevant information for your journey from Houston to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports serve Houston to St. Louis flights?

    You can fly from either of Houston’s major airports to St. Louis. The majority of the flights on this route have one stop in between. There are more flights going from George Bush Intercontinental Airport to Lambert-St. Louis International Airport than from William P. Hobby Airport in Houston.

  • Which airlines fly directly from Houston to St. Louis?

    There are not a lot of direct flights between these two cities but there are a few. They are operated by United. The flight is 2h 5m to 2h 12m, depending on the time of day you go. For more choices of departure times, you can look for a stopover flight.

  • What are the stopover options between Houston to St. Louis?

    American Airlines has a stop in Dallas for this route. Most of these are an hour or less. Delta stops in Atlanta and sometimes in Detroit. There are also a couple of options that stop in Minneapolis. United offers flights that land in Chicago at O’Hare before moving on to St. Louis. Most of the flights are around five hours or so. The longest ones are about eight hours.

  • Do I need a passport or visa to fly from Houston to St. Louis?

    You will not need your passport or a visa for this flight. The connections are all within the United States so the flights are purely domestic. There is only a requirement that you bring a valid form of identification to the airport so you are allowed to board the plane.

  • What airport do you fly into for flights to St. Louis from Houston?

    For a flight from Houston to St. Louis, you will be flying into Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 2 inbound flights from Houston per day. 4 airlines have flights to Lambert-St Louis from Houston on a regular basis.

  • How long is the flight from Houston to St. Louis?

    Departing from Houston to St. Louis will take you 2h 05m. The distance between Houston and St. Louis is about 688 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Houston to St. Louis round-trip?

    Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $111. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $149 and $180, respectively. Frontier is 68% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Houston to St. Louis one-way?

    The cheapest airlines for a one-way flight from Houston to St. Louis are Frontier ($82), Southwest ($108), and United Airlines ($109).

  • What are the cheapest flights from Houston to St. Louis?

    The cheapest flight price from Houston to St. Louis is $178. On average you can expect to pay $357. The most popular route, (Houston Hobby - Lambert-St Louis), can usually be booked for $163.

  • Can I find deals for flights from Houston to St. Louis that include hotel bookings?

    Yes. In addition to deals on Houston to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Houston to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to St. Louis.

  • Can I find deals for business class flights from Houston to St. Louis?

    Yes. Cheapflights offers flight deals from Houston to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Houston to St. Louis (average of $117). Flying from Houston to St. Louis in November is currently the most expensive (average of $241). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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Top 4 airlines flying from Houston to St. Louis

Discover the top 4 airlines that operate flights from Houston to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$228FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$407FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$180Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$234Average$388FlexibilityNo cancel feeOn-time63%

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