St. Louis

$55+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — STL
Dec 5 — Dec 121
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Houston to Lambert-St Louis are usually found in September or April, booked 64 days in advance, depart on a Tuesday or Monday and return on a Monday

Find 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 November 5, 2025.

This Frontier deal was found by Cheapflights users on 11/4. 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 12/48:07 pmIAH - STL
1 stop12h 52mFrontier
Thu 12/1112:04 pmSTL - IAH
1 stop10h 46mFrontier
Deal found 11/4$110
This Booking.com deal was found by Cheapflights users on 11/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/178:48 pmIAH - STL
1 stop12h 19mFrontier
Tue 11/187:45 pmSTL - IAH
1 stop26h 08mFrontier
Deal found 11/3$111
This Gotogate deal was found by Cheapflights users on 11/4. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/23:13 pmIAH - STL
1 stop19h 01mFrontier
Wed 12/37:43 pmSTL - IAH
1 stop28h 48mFrontier
Deal found 11/4$124
This Booking.com deal was found by Cheapflights users on 11/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:32 amIAH - STL
1 stop22h 42mFrontier
Fri 12/57:43 pmSTL - IAH
1 stop28h 48mFrontier
Deal found 11/4$125
This Frontier deal was found by Cheapflights users on 11/5. 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 12/118:07 pmIAH - STL
1 stop12h 52mFrontier
Sun 12/149:54 amSTL - IAH
1 stop8h 40mFrontier
Deal found 11/5$128
This Booking.com deal was found by Cheapflights users on 11/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:07 pmIAH - STL
1 stop26h 26mFrontier
Sat 12/137:43 pmSTL - IAH
1 stop14h 54mFrontier
Deal found 11/3$129
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 11/128:47 pmIAH - STL
1 stop13h 25mMultiple Airlines
Thu 11/132:12 pmSTL - IAH
1 stop9h 47mMultiple Airlines
Deal found 11/4$148
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 11/128:00 amIAH - STL
1 stop26h 12mFrontier
Thu 11/132:12 pmSTL - IAH
1 stop19h 21mFrontier
Deal found 11/4$149
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:48 pmIAH - STL
1 stop12h 19mFrontier
Thu 11/203:14 pmSTL - IAH
1 stop7h 16mFrontier
Deal found 11/3$150
This Booking.com deal was found by Cheapflights users on 11/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:09 pmIAH - STL
1 stop18h 58mFrontier
Wed 11/197:24 pmSTL - IAH
1 stop14h 15mFrontier
Deal found 11/4$152
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/64:50 pmIAH - STL
1 stop16h 57mFrontier
Tue 12/93:30 pmSTL - IAH
2 stops29h 23mFrontier
Deal found 11/3$170
This Southwest deal was found by Cheapflights users on 11/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:25 pmHOU - STL
Nonstop2h 00mSouthwest
Mon 12/85:45 amSTL - HOU
Nonstop2h 15mSouthwest
Deal found 11/3$345

Cheap 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 November 5, 2025.

Round-trip from

$110
(Frontier)

One-way from

$55
(Priceline)

Popular in

January

Cheapest in

September

Average price

$381
From Houston to Lambert-St Louis
One-way flight from Houston to Lambert-St Louis
Highest demand for flights based on searches. 11% potential increase in price ($46 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Average for round-trip flights in November 2025

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 November 5, 2025.
Use the filters below to find and compare flights from Houston to St. Louis that are best for you.

Fly from

Houston

Fly to

St. Louis

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/11

8:07 pm-10:33 pm

1 stop26h 26m

Lambert-St Louis

Sat 12/13

7:43 pm-10:37 am

1 stop14h 54m

$129

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 11/27

9:27 pm-3:08 pm

1 stop17h 41m

Lambert-St Louis

Thu 12/4

3:30 pm-10:50 pm

2 stops31h 20m

$185

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 11/19

8:47 pm-2:29 pm

1 stop17h 42m

Lambert-St Louis

Sun 11/23

11:08 am-12:41 am

1 stop13h 33m

$195

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/4

10:00 am-10:33 pm

2 stops12h 33m

Lambert-St Louis

Fri 12/5

10:42 am-10:50 pm

1 stop12h 08m

$207

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 11/27

2:36 pm-11:57 pm

1 stop9h 21m

Lambert-St Louis

Sun 11/30

9:54 pm-1:57 pm

1 stop16h 03m

$231

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 11/17

8:48 pm-9:07 am

1 stop12h 19m

Lambert-St Louis

Fri 11/21

12:01 pm-5:45 pm

1 stop29h 44m

$238

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 12/4

7:25 pm-6:36 pm

3 stops23h 11m

Lambert-St Louis

Thu 12/11

2:47 pm-12:57 am

1 stop10h 10m

$332

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 12/4

3:25 pm-5:25 pm

Nonstop2h 00m

Lambert-St Louis

Mon 12/8

5:45 am-8:00 am

Nonstop2h 15m

$345

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 1/19

7:20 am-9:22 am

Nonstop2h 02m

Lambert-St Louis

Thu 1/22

6:00 am-8:30 am

Nonstop2h 30m

$345

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 1/19

5:15 am-7:10 am

Nonstop1h 55m

Lambert-St Louis

Thu 1/22

11:55 am-2:20 pm

Nonstop2h 25m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 38 results
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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 October 31, 2025.

Booking 64 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 December is currently the most expensive (average of $218). 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 November 5, 2025.

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 morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 16% 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 December 16, 2024.

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

The best insider tips for Houston to St. Louis flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Houston to St. Louis trip
Airports
IAH

Check security wait times on IAH's website to ensure a smooth departure experience.

Read more about IAHby Evie Carrick
HOU

HOU's single terminal makes it easy to navigate, with short security lines outside peak holiday periods.

Read more about HOUby Scott Laird
STL

Use MetroLink for a convenient and economical ride from STL to downtown St. Louis.

Read more about STLby Taryn White
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick

Evie Carrick

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.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

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.

Read more
Scott Laird

Scott Laird

Expert on HOU

Scott Laird

Scott Laird

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.

Read more

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 November 5, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American 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.

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 1 inbound flight 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. 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 $109. 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 flights from Houston to St. Louis?

    The cheapest flight price from Houston to St. Louis is $124. On average you can expect to pay $295. The most popular route, (Houston Hobby - Lambert-St Louis), can usually be booked for $150.

  • 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 December is currently the most expensive (average of $218). 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Houston to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

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 November 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$232FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$380FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$180Average$350FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$202Average$371FlexibilityNo cancel feeOn-time63%

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