St. Louis

$64+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — STL
Feb 5 — Feb 121
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Cheapflights Tip: The best prices from Houston to Lambert-St Louis are usually found in September or April, booked 88 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 January 6, 2026.

Round-trip from

$132
(Kiwi.com)

One-way from

$64
(Priceline)

Popular in

November

Cheapest in

September

Average price

$384
From Houston to Lambert-St Louis
One-way flight from Houston to Lambert-St Louis
Highest demand for flights based on searches. 4% potential increase in price ($16 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in January 2026

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 January 6, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/6. 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 1/283:18 pmIAH - STL
1 stop8h 15mMultiple Airlines
Wed 2/43:46 pmSTL - IAH
1 stop7h 53mMultiple Airlines
Deal found 1/6$131
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/259:40 pmIAH - STL
1 stop26h 19mMultiple Airlines
Mon 3/23:49 pmSTL - IAH
1 stop27h 15mMultiple Airlines
Deal found 1/5$132
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Fri 1/238:02 pmIAH - STL
1 stop18h 44mFrontier
Fri 1/305:42 pmSTL - IAH
1 stop15h 18mFrontier
Deal found 1/6$133
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Fri 2/66:05 pmIAH - STL
1 stop12h 46mFrontier
Mon 2/91:40 pmSTL - IAH
1 stop10h 53mFrontier
Deal found 1/6$139
This Mytrip deal was found by Cheapflights users on 1/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/38:45 amIAH - STL
1 stop14h 48mFrontier
Tue 2/103:49 pmSTL - IAH
1 stop27h 15mFrontier
Deal found 1/5$140
This Expedia deal was found by Cheapflights users on 1/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/78:18 pmIAH - STL
1 stop11h 46mFrontier
Wed 2/184:51 pmSTL - IAH
1 stop6h 41mFrontier
Deal found 1/4$144
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/298:18 pmIAH - STL
1 stop14h 05mMultiple Airlines
Mon 2/25:42 pmSTL - IAH
1 stop17h 29mMultiple Airlines
Deal found 1/5$147
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/28:35 pmIAH - STL
1 stop26h 58mMultiple Airlines
Mon 2/95:42 pmSTL - IAH
1 stop17h 29mMultiple Airlines
Deal found 1/5$149
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
Fri 2/68:02 pmIAH - STL
1 stop18h 44mFrontier
Wed 2/183:49 pmSTL - IAH
1 stop16h 06mFrontier
Deal found 1/4$150
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/47:45 amIAH - STL
2 stops15h 48mMultiple Airlines
Sat 2/73:46 pmSTL - IAH
1 stop7h 53mMultiple Airlines
Deal found 1/6$152
This Southwest deal was found by Cheapflights users on 1/6. 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.
Mon 2/232:30 pmHOU - STL
1 stop5h 50mSouthwest
Wed 2/2512:55 pmSTL - HOU
Nonstop2h 15mSouthwest
Deal found 1/6$261
This Delta deal was found by Cheapflights users on 1/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/35:45 amHOU - STL
1 stop6h 09mDelta
Tue 2/105:04 pmSTL - HOU
1 stop5h 29mDelta
Deal found 1/5$269

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 January 6, 2026.
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

Fri 1/30

8:02 pm-2:46 pm

1 stop18h 44m

Lambert-St Louis

Sun 2/1

5:42 pm-9:00 am

1 stop15h 18m

$147

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 1/17

8:16 pm-9:11 am

1 stop12h 55m

Lambert-St Louis

Wed 1/21

3:46 pm-11:39 pm

1 stop7h 53m

$181

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 2/10

5:45 am-11:54 am

1 stop6h 09m

Lambert-St Louis

Tue 2/10

5:04 pm-10:33 pm

1 stop5h 29m

$269

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 3/9

5:22 pm-11:58 pm

1 stop6h 36m

Lambert-St Louis

Wed 3/11

6:04 am-1:28 pm

1 stop7h 24m

$270

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 2/23

6:15 am-8:02 pm

2 stops13h 47m

Lambert-St Louis

Thu 3/5

3:49 pm-7:29 am

1 stop15h 40m

$288

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 3/9

9:30 am-11:30 am

Nonstop2h 00m

Lambert-St Louis

Wed 3/11

5:35 am-7:50 am

Nonstop2h 15m

$305

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 1/29

5:40 am-7:35 am

Nonstop1h 55m

Lambert-St Louis

Mon 2/2

6:05 am-11:50 am

1 stop5h 45m

$307

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 1/26

2:35 pm-4:30 pm

Nonstop1h 55m

Lambert-St Louis

Thu 1/29

3:50 pm-8:15 pm

1 stop4h 25m

$307

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 2/10

7:20 am-9:22 am

Nonstop2h 02m

Lambert-St Louis

Tue 2/10

4:35 pm-7:05 pm

Nonstop2h 30m

$321

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 1/29

7:55 pm-10:00 pm

Nonstop2h 05m

Lambert-St Louis

Mon 2/2

6:00 am-8:30 am

Nonstop2h 30m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 40 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 January 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 $242). 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 January 6, 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 morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 19% 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 January 3, 2026.

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. Sunday at noon 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

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
Airports
IAH

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

HOU

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

STL

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

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 January 6, 2026.
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.

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

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.

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

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.

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

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.

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

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.

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

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 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. 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 $108. 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 ($55), Southwest ($88), and United Airlines ($88).

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

    The cheapest flight price from Houston to St. Louis is $148. On average you can expect to pay $318. The most popular route, (Houston Hobby - Lambert-St Louis), can usually be booked for $132.

  • 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 $242). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

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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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$238FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$377FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$180Average$378FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$198Average$367FlexibilityNo cancel feeOn-time63%

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