What are the cheapest airlines flying from Houston George Bush Intcntl Airport to St. Louis round-trip?

According to our current data, Spirit Airlines ($128), United Airlines ($217), and Delta ($237) offers the cheapest pricing from Houston George Bush Intcntl Airport to St. Louis. These flights start at 66% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to St. Louis one-way?

The cheapest airlines for a one-way flight from Houston George Bush Intcntl Airport to St. Louis are Spirit Airlines ($54), United Airlines ($109), and Delta ($119).

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the cheapest flights from Houston George Bush Intcntl Airport to St. Louis?

The cheapest flight price from Houston George Bush Intcntl Airport to St. Louis is $173. On average you can expect to pay $410. The most popular route, (Houston George Bush Intcntl - Lambert-St Louis), can usually be booked for $137.

What are the most reliable airlines from Houston George Bush Intcntl Airport to St. Louis?

The top 3 most reliable airlines when flying from Houston George Bush Intcntl Airport to St. Louis are CommutAir (100%), Air New Zealand (71%) and Mesa Airlines (70%).

What are the most popular airlines that fly from Houston George Bush Intcntl Airport to St. Louis?

Before booking your flight from Houston George Bush Intcntl Airport to St. Louis check out the most popular airlines for this route: American Airlines, Frontier or United Airlines.

What is the cheapest day to fly round-trip from Houston George Bush Intcntl Airport to St. Louis?

Leaving on a Friday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 36% on the overall cost on flights from Houston George Bush Intcntl Airport to St. Louis.

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

April is one of the best times of the year to fly to St. Louis from Houston George Bush Intcntl Airport. Prices for April average $355 per person but you can even find prices for as low as $182. The most expensive prices can be found in the month of July. Opting for a April flight can save you 15% on your journey compared to booking in July

What airport do you fly into for flights to St. Louis from Houston George Bush Intcntl?

Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Houston George Bush Intcntl to St. Louis. You should not have trouble finding flights to Lambert-St Louis from Houston George Bush Intcntl; the airport handles an average of 13 inbound flights from Houston George Bush Intcntl per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the St. Louis airport from Houston George Bush Intcntl. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

Can I find deals for flights from George Bush Intcntl to St. Louis that include hotel bookings?

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

How can I find direct flights from George Bush Intcntl to St. Louis?

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

Can I find deals for business class flights from George Bush Intcntl to St. Louis?

Yes. Cheapflights offers flight deals from George Bush Intcntl 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.

$54+ Flights from Houston George Bush Intcntl Airport to St. Louis

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Cheapflights Tip: The best prices from Houston George Bush Intcntl to Lambert-St Louis are usually found in August or May, booked 65 days in advance, depart on a Saturday or Friday and return on a Wednesday

Cheap flight deals from George Bush Intcntl to St. Louis

Round-trip from	$128 (FlightHub)
One-way from	$54 (Cheapflightsfares)
Popular in	February
Cheapest in	August
Average price	$362
Good round-trip deal	$227 or less
Good one-way deal	$315 or less

From Houston George Bush Intcntl to Lambert-St Louis

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One-way flight from Houston George Bush Intcntl to Lambert-St Louis

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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Houston George Bush Intcntl to Lambert-St Louis.

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Price to beat on a one-way flight from Houston George Bush Intcntl to Lambert-St Louis.

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Find flight deals from George Bush Intcntl to St. Louis

Cheapest flights from George Bush Intcntl to St. Louis
Explore the most affordable flight options available from George Bush Intcntl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Fri 8/226:10 amIAH - STL

1 stop7h 22mSpirit Airlines

Sun 8/242:30 pmSTL - IAH

1 stop5h 13mSpirit Airlines

Deal found 7/19

$128

Mon 8/182:14 pmIAH - STL

1 stop9h 33mMultiple Airlines

Mon 8/252:30 pmSTL - IAH

1 stop5h 13mMultiple Airlines

Deal found 7/21

$202

Sat 9/2012:15 pmIAH - STL

Nonstop2h 11mUnited Airlines

Mon 9/224:32 pmSTL - IAH

Nonstop2h 18mUnited Airlines

Deal found 7/21

$217

Wed 8/139:36 amIAH - STL

1 stop5h 05mDelta

Wed 8/206:00 amSTL - IAH

1 stop6h 02mDelta

Deal found 7/20

$237

Thu 8/142:32 pmIAH - STL

1 stop8h 31mAmerican Airlines

Mon 8/1810:08 amSTL - IAH

1 stop7h 37mAmerican Airlines

Deal found 7/21

$238

Tue 7/2910:04 pmIAH - STL

1 stop11h 07mFrontier

Thu 7/312:36 pmSTL - IAH

1 stop8h 20mFrontier

Deal found 7/19

$264

Best flights from George Bush Intcntl to St. Louis
Discover carefully curated flight deals from George Bush Intcntl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 21, 2025.

Fri 8/226:10 amIAH - STL

1 stop7h 22mSpirit Airlines

Sun 8/242:30 pmSTL - IAH

1 stop5h 13mSpirit Airlines

Deal found 7/19

$128

Mon 8/182:14 pmIAH - STL

1 stop9h 33mMultiple Airlines

Mon 8/252:30 pmSTL - IAH

1 stop5h 13mMultiple Airlines

Deal found 7/21

$202

Sat 9/2012:15 pmIAH - STL

Nonstop2h 11mUnited Airlines

Mon 9/224:32 pmSTL - IAH

Nonstop2h 18mUnited Airlines

Deal found 7/21

$217

Wed 8/139:36 amIAH - STL

1 stop5h 05mDelta

Wed 8/206:00 amSTL - IAH

1 stop6h 02mDelta

Deal found 7/20

$237

Thu 8/142:32 pmIAH - STL

1 stop8h 31mAmerican Airlines

Mon 8/1810:08 amSTL - IAH

1 stop7h 37mAmerican Airlines

Deal found 7/21

$238

Tue 8/510:04 pmIAH - STL

1 stop11h 07mFrontier

Sun 8/102:36 pmSTL - IAH

1 stop8h 20mFrontier

Deal found 7/19

$264

Last-minute flights from George Bush Intcntl to St. Louis
Discover last-minute flight deals from George Bush Intcntl to St. Louis. Data last updated July 21, 2025 and is based on user searches.

Tue 7/2910:04 pmIAH - STL

1 stop11h 07mFrontier

Thu 7/312:36 pmSTL - IAH

1 stop8h 20mFrontier

Deal found 7/19

$264

Tue 7/298:56 pmIAH - STL

1 stop26h 51mMultiple Airlines

Fri 8/110:47 amSTL - IAH

1 stop8h 38mMultiple Airlines

Deal found 7/21

$312

Thu 7/317:05 amIAH - STL

2 stops26h 47mSpirit Airlines

Sun 8/310:47 amSTL - IAH

2 stops19h 08mSpirit Airlines

Deal found 7/20

$362

Wed 8/139:36 amIAH - STL

1 stop5h 05mDelta

Wed 8/206:00 amSTL - IAH

1 stop6h 02mDelta

Deal found 7/20

$237

Thu 8/142:32 pmIAH - STL

1 stop8h 31mAmerican Airlines

Mon 8/1810:08 amSTL - IAH

1 stop7h 37mAmerican Airlines

Deal found 7/21

$238

Mon 8/182:14 pmIAH - STL

1 stop9h 33mMultiple Airlines

Mon 8/252:30 pmSTL - IAH

1 stop5h 13mMultiple Airlines

Deal found 7/21

$202

Fri 8/226:10 amIAH - STL

1 stop7h 22mSpirit Airlines

Sun 8/242:30 pmSTL - IAH

1 stop5h 13mSpirit Airlines

Deal found 7/19

$128

Fri 8/298:00 pmIAH - STL

Nonstop2h 08mUnited Airlines

Sun 8/318:20 amSTL - IAH

Nonstop2h 11mUnited Airlines

Deal found 7/19

$251

One-way flights from George Bush Intcntl to St. Louis
Search for one-way flight options from George Bush Intcntl to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 21, 2025.

Fri 8/156:10 amIAH - STL

1 stop7h 22mSpirit Airlines

Deal found 7/19

$54

Mon 8/258:00 pmIAH - STL

Nonstop2h 08mUnited Airlines

Deal found 7/21

$109

Tue 9/163:59 pmIAH - STL

1 stop6h 01mDelta

Deal found 7/19

$119

Thu 10/92:24 pmIAH - STL

1 stop9h 17mAmerican Airlines

Deal found 7/19

$124

Thu 7/316:00 amIAH - STL

1 stop7h 34mFrontier

Deal found 7/20

$137

Fri 9/267:49 amIAH - STL

2 stops8h 56mMultiple Airlines

Deal found 7/19

$148

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 8/22

6:10 am-1:32 pm

1 stop7h 22m

Lambert-St Louis

Sun 8/24

2:30 pm-7:43 pm

1 stop5h 13m

$128

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 8/18

2:14 pm-11:47 pm

1 stop9h 33m

Lambert-St Louis

Mon 8/25

2:30 pm-7:43 pm

1 stop5h 13m

$202

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 9/20

12:15 pm-2:26 pm

Nonstop2h 11m

Lambert-St Louis

Mon 9/22

4:32 pm-6:50 pm

Nonstop2h 18m

$217

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 8/13

9:36 am-2:41 pm

1 stop5h 05m

Lambert-St Louis

Wed 8/20

6:00 am-12:02 pm

1 stop6h 02m

$237

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 8/14

2:32 pm-11:03 pm

1 stop8h 31m

Lambert-St Louis

Mon 8/18

10:08 am-5:45 pm

1 stop7h 37m

$238

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 8/5

10:04 pm-9:11 am

1 stop11h 07m

Lambert-St Louis

Sun 8/10

2:36 pm-10:56 pm

1 stop8h 20m

$264

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 8/15

6:10 am-1:32 pm

1 stop7h 22m

$54

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 8/25

8:00 pm-10:08 pm

Nonstop2h 08m

$109

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 9/16

3:59 pm-10:00 pm

1 stop6h 01m

$119

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 10/9

2:24 pm-11:41 pm

1 stop9h 17m

$124

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 12 results

The best insider tips for Houston George Bush Intcntl Airport to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to St. Louis trip

Airports

IAH

Check the IAH Depart tab online for current security wait times to plan your arrival at the airport efficiently.

STL

Use the MetroLink light rail for a convenient and economical way to reach downtown St. Louis from STL Airport.

Our travel experts

Evie Carrick

Expert on IAH

Taryn White

Expert on STL

Best time to book a flight from George Bush Intcntl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from George Bush Intcntl 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 George Bush Intcntl Airport to St. Louis

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston George Bush Intcntl Airport 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 George Bush Intcntl Airport to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $311). Flying from Houston George Bush Intcntl Airport to St. Louis in March is currently the most expensive (average of $356). 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 IAH to STL?

When flying from Houston George Bush Intcntl Airport to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 17% versus a flight in the morning.

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

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to St. Louis flight should consider departing on Saturday evenings 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.

Weekly flight availability from Houston George Bush Intcntl Airport to St. Louis

The most flights from IAH to STL are scheduled on a Wednesday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Houston George Bush Intcntl Airport to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,962 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,868 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Spirit Airlines

6.3

Okay

8,029 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,244 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What airport do you fly into for flights to St. Louis from Houston George Bush Intcntl?
Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Houston George Bush Intcntl to St. Louis. You should not have trouble finding flights to Lambert-St Louis from Houston George Bush Intcntl; the airport handles an average of 13 inbound flights from Houston George Bush Intcntl per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the St. Louis airport from Houston George Bush Intcntl. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.
What are the cheapest airlines flying from Houston George Bush Intcntl Airport to St. Louis round-trip?
According to our current data, Spirit Airlines ($128), United Airlines ($217), and Delta ($237) offers the cheapest pricing from Houston George Bush Intcntl Airport to St. Louis. These flights start at 66% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to St. Louis one-way?
The cheapest airlines for a one-way flight from Houston George Bush Intcntl Airport to St. Louis are Spirit Airlines ($54), United Airlines ($109), and Delta ($119).
What are the most reliable airlines from Houston George Bush Intcntl Airport to St. Louis?
The top 3 most reliable airlines when flying from Houston George Bush Intcntl Airport to St. Louis are CommutAir (100%), Air New Zealand (71%) and Mesa Airlines (70%).
What are the cheapest flights from Houston George Bush Intcntl Airport to St. Louis?
The cheapest flight price from Houston George Bush Intcntl Airport to St. Louis is $173. On average you can expect to pay $410. The most popular route, (Houston George Bush Intcntl - Lambert-St Louis), can usually be booked for $137.
Can I find deals for flights from George Bush Intcntl to St. Louis that include hotel bookings?
Yes. In addition to deals on George Bush Intcntl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from George Bush Intcntl to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from George Bush Intcntl to St. Louis.
Can I find deals for business class flights from George Bush Intcntl to St. Louis?
Yes. Cheapflights offers flight deals from George Bush Intcntl 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 George Bush Intcntl Airport to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to St. Louis (average of $311). Flying from Houston George Bush Intcntl Airport to St. Louis in March is currently the most expensive (average of $356). 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

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Maryland Heights

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Eureka

St. Peters

Glencoe

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Festus

Chesterfield

Farmington

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Top 3 airlines flying from George Bush Intcntl to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$109	Average$219	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$180	Average$342	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$215	Average$394	FlexibilityNo cancel fee	On-time69%

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$54+ Cheap flights from George Bush Intcntl (IAH) 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from George Bush Intcntl to St. Louis with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Houston George Bush Intcntl to Lambert-St Louis are usually found in August or May, booked 65 days in advance, depart on a Saturday or Friday and return on a Wednesday

Cheap flight deals from George Bush Intcntl to St. Louis

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Find flight deals from George Bush Intcntl to St. Louis

Cheapest flights from George Bush Intcntl to St. LouisExplore the most affordable flight options available from George Bush Intcntl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Explore the most affordable flight options available from George Bush Intcntl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to St. Louis that are best for you.

The best insider tips for Houston George Bush Intcntl Airport to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to St. Louis trip

Airports

IAH

STL

Our travel experts

Best time to book a flight from George Bush Intcntl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from George Bush Intcntl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Houston George Bush Intcntl Airport to St. Louis

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

Use this chart to determine the optimal time to book a round-trip flight from George Bush Intcntl to St. Louis. Price data was last updated on July 18, 2025.

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

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

Find hourly flight availability from George Bush Intcntl 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 July 21, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to St. Louis. Price data was last updated on July 13, 2025.

Weekly flight availability from Houston George Bush Intcntl Airport to St. Louis

Reviews of airlines servicing St. Louis

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl 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 airport do you fly into for flights to St. Louis from Houston George Bush Intcntl?

What are the cheapest airlines flying from Houston George Bush Intcntl Airport to St. Louis round-trip?

What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to St. Louis one-way?

What are the most reliable airlines from Houston George Bush Intcntl Airport to St. Louis?

What are the cheapest flights from Houston George Bush Intcntl Airport to St. Louis?

Can I find deals for flights from George Bush Intcntl to St. Louis that include hotel bookings?

How can I find direct flights from George Bush Intcntl to St. Louis?

Can I find deals for business class flights from George Bush Intcntl to St. Louis?

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

Traveling to a place near St. Louis?

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Alternative routes for George Bush Intcntl to St. Louis

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Top 3 airlines flying from George Bush Intcntl to St. Louis

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Cheapest flights from George Bush Intcntl to St. Louis
Explore the most affordable flight options available from George Bush Intcntl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.