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Cheap flights from St. Louis to Houston from $67

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Houston departing on 3/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

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American Airlines Logo
5:20 am - 11:27 am
STL
-
IAH
6h 07m
1 stop
American Airlines Logo
10:50 am - 7:33 pm
IAH
-
STL
8h 43m
1 stop
$278American Airlines
Fri, Apr 10 - Sat, Apr 11
Frontier Logo
1:58 pm - 8:08 pm
STL
-
IAH
6h 10m
1 stop
Frontier Logo
9:16 pm - 7:02 am
IAH
-
STL
9h 46m
1 stop
$279Frontier
Sat, Mar 7 - Sun, Mar 15
Frontier Logo
10:11 pm - 6:25 pm
STL
-
IAH
20h 14m
1 stop
Frontier Logo
9:15 pm - 11:19 pm
IAH
-
STL
26h 04m
1 stop
$280Frontier
Thu, Mar 5 - Mon, Mar 9
Frontier Logo
1:59 pm - 12:33 am
STL
-
IAH
10h 34m
1 stop
Frontier Logo
9:03 pm - 7:10 pm
IAH
-
STL
22h 07m
1 stop
$281Frontier
Fri, Feb 27 - Sat, Mar 7
Frontier Logo
10:47 pm - 9:42 am
STL
-
IAH
10h 55m
1 stop
Frontier Logo
9:03 pm - 10:32 am
IAH
-
STL
13h 29m
2 stops
$285Frontier
Thu, Mar 19 - Mon, Mar 23
Frontier Logo
10:47 pm - 9:42 am
STL
-
IAH
10h 55m
1 stop
Frontier Logo
10:56 pm - 9:49 am
IAH
-
STL
10h 53m
1 stop
$289Frontier
Thu, Mar 19 - Sun, Mar 22
Frontier Logo
12:14 pm - 1:10 pm
STL
-
IAH
24h 56m
1 stop
Frontier Logo
10:27 pm - 12:15 pm
IAH
-
STL
13h 48m
1 stop
$290Frontier
Wed, Mar 11 - Mon, Mar 16
Multiple Airlines Logo
8:12 pm - 8:31 am
STL
-
IAH
36h 19m
2 stops
Multiple Airlines Logo
5:15 am - 10:37 am
IAH
-
STL
5h 22m
1 stop
$291Multiple Airlines
Sat, Mar 14 - Wed, Mar 18
Frontier Logo
12:16 pm - 10:56 pm
STL
-
IAH
10h 40m
1 stop
Frontier Logo
10:56 pm - 9:49 am
IAH
-
STL
10h 53m
1 stop
$292Frontier
Fri, Mar 20 - Sun, Mar 22
Frontier Logo
3:49 pm - 7:00 am
STL
-
IAH
15h 11m
1 stop
Frontier Logo
8:41 pm - 11:19 am
IAH
-
STL
14h 38m
1 stop
$296Frontier
Sun, Mar 1 - Sun, Mar 8

United Airlines flights from St. Louis to Houston George Bush Intcntl Airport

Our best United Airlines deals on St. Louis to Houston George Bush Intcntl Airport flight tickets
United Airlines
Apr 28
STL10:09 amLambert-St Louis
2h 24m
IAH12:33 pmHouston George Bush Intcntl
May 2
IAH1:52 pmHouston George Bush Intcntl
2h 09m
STL4:01 pmLambert-St Louis
$297
United Airlines
Mar 5
STL6:00 amLambert-St Louis
2h 20m
IAH8:20 amHouston George Bush Intcntl
Mar 12
IAH8:12 pmHouston George Bush Intcntl
2h 04m
STL10:16 pmLambert-St Louis
$317
United Airlines
Mar 11
STL6:00 amLambert-St Louis
2h 20m
IAH8:20 amHouston George Bush Intcntl
Mar 15
IAH7:20 amHouston George Bush Intcntl
2h 01m
STL9:21 amLambert-St Louis
$336

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

Our best Frontier deals on St. Louis to Houston George Bush Intcntl Airport flight tickets
Frontier
Mar 7
STL1:58 pmLambert-St Louis
6h 10m
1 stop
IAH8:08 pmHouston George Bush Intcntl
Mar 15
IAH9:16 pmHouston George Bush Intcntl
9h 46m
1 stop
STL7:02 amLambert-St Louis
$279
Frontier
Mar 5
STL10:11 pmLambert-St Louis
20h 14m
1 stop
IAH6:25 pmHouston George Bush Intcntl
Mar 9
IAH9:15 pmHouston George Bush Intcntl
26h 04m
1 stop
STL11:19 pmLambert-St Louis
$280
Frontier
Feb 27
STL1:59 pmLambert-St Louis
10h 34m
1 stop
IAH12:33 amHouston George Bush Intcntl
Mar 7
IAH9:03 pmHouston George Bush Intcntl
22h 07m
1 stop
STL7:10 pmLambert-St Louis
$281

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Houston George Bush Intcntl Airport 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, momondo users made 832,500 searches. Data last updated February 10, 2026.
Use the filters below to find and compare flights from St. Louis to Houston George Bush Intcntl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 4/10

5:20 am-11:27 am

1 stop6h 07m

Houston George Bush Intcntl

Sat 4/11

10:50 am-7:33 pm

1 stop8h 43m

$278

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 3/7

1:58 pm-8:08 pm

1 stop6h 10m

Houston George Bush Intcntl

Sun 3/15

9:16 pm-7:02 am

1 stop9h 46m

$279

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 3/5

10:11 pm-6:25 pm

1 stop20h 14m

Houston George Bush Intcntl

Mon 3/9

9:15 pm-11:19 pm

1 stop26h 04m

$280

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 2/27

1:59 pm-12:33 am

1 stop10h 34m

Houston George Bush Intcntl

Sat 3/7

9:03 pm-7:10 pm

1 stop22h 07m

$281

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 3/19

10:47 pm-9:42 am

1 stop10h 55m

Houston George Bush Intcntl

Mon 3/23

9:03 pm-10:32 am

2 stops13h 29m

$285

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 3/19

10:47 pm-9:42 am

1 stop10h 55m

Houston George Bush Intcntl

Sun 3/22

10:56 pm-9:49 am

1 stop10h 53m

$289

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 3/11

12:14 pm-1:10 pm

1 stop24h 56m

Houston George Bush Intcntl

Mon 3/16

10:27 pm-12:15 pm

1 stop13h 48m

$290

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sat 3/14

8:12 pm-8:31 am

2 stops36h 19m

Houston George Bush Intcntl

Wed 3/18

5:15 am-10:37 am

1 stop5h 22m

$291

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 3/20

12:16 pm-10:56 pm

1 stop10h 40m

Houston George Bush Intcntl

Sun 3/22

10:56 pm-9:49 am

1 stop10h 53m

$292

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sun 3/1

3:49 pm-7:00 am

1 stop15h 11m

Houston George Bush Intcntl

Sun 3/8

8:41 pm-11:19 am

1 stop14h 38m

$296

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Houston from

How to get the cheapest flight ticket from St. Louis to Houston George Bush Intcntl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Houston George Bush Intcntl Airport?

The month of January is, on average, the cheapest month to fly to Houston George Bush Intcntl Airport from St. Louis, with most prices found around $236. If you are unable to visit Houston George Bush Intcntl Airport during the month of January, then departing from St. Louis during the month August is also very affordable. Most momondo users find prices during this month for around $303.

What is the cheapest day to depart on your flight to Houston George Bush Intcntl Airport?

The cheapest day to depart from St. Louis to Houston George Bush Intcntl Airport is on a Friday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Friday will often find tickets for as low as $533. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Houston George Bush Intcntl Airport on Sunday is $635.

What is the cheapest time of day to depart on your flight to Houston George Bush Intcntl Airport?

Our data shows that the cheapest St. Louis to Houston George Bush Intcntl Airport flights are usually those with departure times in the morning. Our users have found flights to Houston George Bush Intcntl Airport in the morning for as low as $569. Try not to purchase tickets in the afternoon because they tend to be around $723. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Lambert-St Louis to Houston George Bush Intcntl flight route?

Fly from Lambert-St Louis to Houston George Bush Intcntl for the best Lambert-St Louis - Houston George Bush Intcntl flight prices

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

You are more likely to see cheaper flights to Houston George Bush Intcntl Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Houston George Bush Intcntl Airport for around $372 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Houston George Bush Intcntl Airport from St. Louis for as low as $284 on momondo.

What cabin class options are available on Lambert-St Louis to Houston George Bush Intcntl flights?

There are 4 cabin classes available to choose from on Lambert-St Louis to Houston George Bush Intcntl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Houston George Bush Intcntl Airport flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Houston George Bush Intcntl Airport.

How have St. Louis to Houston George Bush Intcntl Airport flight prices changed over time?

As of February 2026, prices for St. Louis to Houston George Bush Intcntl Airport flights are approximately 41% more expensive when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Houston George Bush Intcntl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Houston George Bush Intcntl Airport (STL to IAH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Houston George Bush Intcntl Airport

Best Price Found

$203

Fastest flight time

2h 16m

Direct flights

Every day
The best one-way flight to Houston George Bush Intcntl Airport from St. Louis in the past 72 hours is $203. The best round-trip flight deal from St. Louis to Houston George Bush Intcntl Airport found on momondo in the last 72 hours is $430.
The fastest flight from St. Louis to Houston George Bush Intcntl Airport takes 2h 16m
Direct flights go from St. Louis to Houston George Bush Intcntl Airport every day.
Search flight deals

  • How far is Lambert-St Louis to Houston George Bush Intcntl by plane?

    Lambert-St Louis and Houston George Bush Intcntl are 664.5 mi apart from one another. In terms of flight time, this usually takes a little over 2h 16m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Houston George Bush Intcntl Airport?

    Prices for flights from Lambert-St Louis Airport to Houston George Bush Intcntl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Houston George Bush Intcntl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Houston George Bush Intcntl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Houston George Bush Intcntl Airport.

  • What documentation or ID do you need to fly to Houston George Bush Intcntl Airport?

    The necessary travel and health documents for your Houston George Bush Intcntl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Houston George Bush Intcntl Airport?

  • What is the most popular airline from St. Louis to Houston George Bush Intcntl Airport?

Best airlines flying from St. Louis to Houston George Bush Intcntl Airport

Compare and see reviews for airlines that fly from St. Louis to Houston George Bush Intcntl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $144Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
American AirlinesPriceFrom $167Free CancellationRating
7.2
11,259 reviews
Search American Airlines flights
United AirlinesPriceFrom $203Free CancellationRating
7.4
9,267 reviews
Search United Airlines flights

  • United Airlines Flights From St. Louis to Houston George Bush Intcntl Airport

    United Airlines flies from St. Louis to Houston George Bush Intcntl Airport around 14 times per week, with 9,267 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from St. Louis to Houston George Bush Intcntl Airport in the last 72 hours was $203 (round-trip), much lower than the average airfare cost of $405 for United Airlines flights on this route.

Traveling to a place near Houston?

Book flights to Houston if you plan to visit one of these locations
Katy
The Woodlands
Conroe
Cypress
Humble
Spring
Montgomery
Tomball
Livingston
Jersey Village

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Houston?

It is quick and easy to find St. Louis to Houston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Houston that suits you.

Can I find flights from St. Louis to Houston with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Houston from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Houston?

Once all potential St. Louis to Houston flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Houston right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Houston flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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