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Cheap flights from St. Louis to Houston from $82

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 8/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Houston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:09 pm - 8:45 am
STL
-
IAH
16h 36m
1 stop
Frontier Logo
6:30 am - 7:23 pm
IAH
-
STL
12h 53m
1 stop
$280Frontier
Sun, Jul 19 - Sat, Jul 25
Frontier Logo
7:10 pm - 7:20 am
STL
-
IAH
36h 10m
2 stops
Frontier Logo
10:53 am - 5:37 pm
IAH
-
STL
6h 44m
1 stop
$281Frontier
Thu, Jul 23 - Thu, Jul 30
Frontier Logo
8:08 pm - 12:40 am
STL
-
IAH
28h 32m
1 stop
Frontier Logo
10:09 pm - 7:23 pm
IAH
-
STL
21h 14m
1 stop
$282Frontier
Mon, Aug 3 - Sun, Aug 9
United Airlines Logo
6:14 am - 8:31 am
STL
-
IAH
2h 17mnonstop
United Airlines Logo
8:00 am - 10:10 am
IAH
-
STL
2h 10mnonstop
$284United Airlines
Mon, Aug 10 - Wed, Aug 12
United Airlines Logo
11:10 am - 1:25 pm
STL
-
IAH
2h 15mnonstop
United Airlines Logo
8:30 pm - 10:45 pm
IAH
-
STL
2h 15mnonstop
$285United Airlines
Wed, Jul 29 - Mon, Aug 10
Frontier Logo
7:58 pm - 12:40 am
STL
-
IAH
28h 42m
1 stop
Frontier Logo
8:57 am - 4:11 pm
IAH
-
STL
7h 14m
1 stop
$286Frontier
Fri, Aug 28 - Sat, Sep 5
Frontier Logo
4:57 pm - 2:50 pm
STL
-
IAH
21h 53m
2 stops
Frontier Logo
8:02 pm - 8:57 am
IAH
-
STL
12h 55m
1 stop
$287Frontier
Fri, Jul 17 - Sun, Jul 19
Frontier Logo
4:09 pm - 6:25 pm
STL
-
IAH
26h 16m
1 stop
Frontier Logo
7:23 pm - 11:59 pm
IAH
-
STL
28h 36m
1 stop
$288Frontier
Sun, Jul 19 - Sat, Jul 25
Frontier Logo
4:57 pm - 10:39 pm
STL
-
IAH
5h 42m
1 stop
Frontier Logo
1:16 pm - 11:59 pm
IAH
-
STL
10h 43m
1 stop
$292Frontier
Fri, Jul 10 - Sat, Jul 18
Frontier Logo
7:10 pm - 12:22 pm
STL
-
IAH
17h 12m
1 stop
Frontier Logo
7:23 pm - 11:59 pm
IAH
-
STL
28h 36m
1 stop
$293Frontier
Thu, Jul 23 - Sun, Jul 26

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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
Jul 19
STL4:09 pmLambert-St Louis
16h 36m
1 stop
IAH8:45 amHouston George Bush Intcntl
Jul 25
IAH6:30 amHouston George Bush Intcntl
12h 53m
1 stop
STL7:23 pmLambert-St Louis
$280
Frontier
Jul 23
STL7:10 pmLambert-St Louis
36h 10m
2 stops
IAH7:20 amHouston George Bush Intcntl
Jul 30
IAH10:53 amHouston George Bush Intcntl
6h 44m
1 stop
STL5:37 pmLambert-St Louis
$281
Frontier
Aug 3
STL8:08 pmLambert-St Louis
28h 32m
1 stop
IAH12:40 amHouston George Bush Intcntl
Aug 9
IAH10:09 pmHouston George Bush Intcntl
21h 14m
1 stop
STL7:23 pmLambert-St Louis
$282

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
Aug 10
STL6:14 amLambert-St Louis
2h 17m
IAH8:31 amHouston George Bush Intcntl
Aug 12
IAH8:00 amHouston George Bush Intcntl
2h 10m
STL10:10 amLambert-St Louis
$284
United Airlines
Jul 29
STL11:10 amLambert-St Louis
2h 15m
IAH1:25 pmHouston George Bush Intcntl
Aug 10
IAH8:30 pmHouston George Bush Intcntl
2h 15m
STL10:45 pmLambert-St Louis
$285
United Airlines
Jul 21
STL6:14 amLambert-St Louis
2h 17m
IAH8:31 amHouston George Bush Intcntl
Aug 5
IAH8:00 amHouston George Bush Intcntl
2h 07m
STL10:07 amLambert-St Louis
$318

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 June 29, 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

Cheapest round-trip

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sun 7/19

4:09 pm-8:45 am

1 stop16h 36m

Houston George Bush Intcntl

Sat 7/25

6:30 am-7:23 pm

1 stop12h 53m

$280

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 7/23

7:10 pm-7:20 am

2 stops36h 10m

Houston George Bush Intcntl

Thu 7/30

10:53 am-5:37 pm

1 stop6h 44m

$281

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Mon 8/3

8:08 pm-12:40 am

1 stop28h 32m

Houston George Bush Intcntl

Sun 8/9

10:09 pm-7:23 pm

1 stop21h 14m

$282
Quickest round-trip

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Mon 8/10

6:14 am-8:31 am

Nonstop2h 17m

Houston George Bush Intcntl

Wed 8/12

8:00 am-10:10 am

Nonstop2h 10m

$284

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 7/29

11:10 am-1:25 pm

Nonstop2h 15m

Houston George Bush Intcntl

Mon 8/10

8:30 pm-10:45 pm

Nonstop2h 15m

$285

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 8/28

7:58 pm-12:40 am

1 stop28h 42m

Houston George Bush Intcntl

Sat 9/5

8:57 am-4:11 pm

1 stop7h 14m

$286

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 7/17

4:57 pm-2:50 pm

2 stops21h 53m

Houston George Bush Intcntl

Sun 7/19

8:02 pm-8:57 am

1 stop12h 55m

$287

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sun 7/19

4:09 pm-6:25 pm

1 stop26h 16m

Houston George Bush Intcntl

Sat 7/25

7:23 pm-11:59 pm

1 stop28h 36m

$288

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 7/10

4:57 pm-10:39 pm

1 stop5h 42m

Houston George Bush Intcntl

Sat 7/18

1:16 pm-11:59 pm

1 stop10h 43m

$292

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 7/23

7:10 pm-12:22 pm

1 stop17h 12m

Houston George Bush Intcntl

Sun 7/26

7:23 pm-11:59 pm

1 stop28h 36m

$293

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 typical price of a round-trip flight between St. Louis and Houston George Bush Intcntl Airport?

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 $243. 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 $301.

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 $490. 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 $605.

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 at noon. Our users have found flights to Houston George Bush Intcntl Airport at noon for as low as $547. Try not to purchase tickets in the afternoon because they tend to be around $633. 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 from St. Louis 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 $384 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 $292 on momondo.

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

There are 4 cabin classes available to choose from on St. Louis to Houston George Bush Intcntl Airport 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?

You could potentially save up to 9% on your flight if you consider stops on a St. Louis to Houston George Bush Intcntl Airport flight.

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

As of June 2026, prices for St. Louis to Houston George Bush Intcntl Airport flights are approximately 112% 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

$301

Fastest flight time

2h 15m

Direct flights

Every day
The best one-way flight to Houston George Bush Intcntl Airport from St. Louis in the past 72 hours is $301. The best round-trip flight deal from St. Louis to Houston George Bush Intcntl Airport found on momondo in the last 72 hours is $512.
The fastest flight from St. Louis to Houston George Bush Intcntl Airport takes 2h 15m
Direct flights go from St. Louis to Houston George Bush Intcntl Airport every day.
Search flight deals

Frequently asked questions about flying from St. Louis to Houston George Bush Intcntl Airport

  • 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 15m.

  • 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 $153Free CancellationRating
5.6
2,855 reviews
Search Frontier flights
American AirlinesPriceFrom $167Free CancellationRating
7.1
11,772 reviews
Search American Airlines flights
United AirlinesPriceFrom $234Free CancellationRating
7.4
9,896 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 27 times per week, with 9,896 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 $234 (round-trip), much lower than the average airfare cost of $420 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
Humble
Conroe
Spring
Montgomery
Cypress
Jersey Village
Tomball
Livingston

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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