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Cheap flights from St. Louis to Houston from $54

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 9/18. 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

Spirit Airlines Logo
2:30 pm - 7:43 pmSTL-IAH
5h 13m1 stop
Spirit Airlines Logo
6:10 am - 1:32 pmIAH-STL
7h 22m1 stop
$137Spirit Airlines
Find Deal
jue., ago. 21 - vie., ago. 22
Spirit Airlines Logo
2:30 pm - 7:43 pmSTL-IAH
5h 13m1 stop
Spirit Airlines Logo
6:10 am - 1:32 pmIAH-STL
7h 22m1 stop
$147Spirit Airlines
Find Deal
lun., ago. 18 - vie., ago. 22
Spirit Airlines Logo
2:30 pm - 7:43 pmSTL-IAH
5h 13m1 stop
Spirit Airlines Logo
6:45 am - 10:50 amIAH-STL
28h 05m1 stop
$153Spirit Airlines
Find Deal
dom., ago. 31 - sáb., sep. 6
Logo
5:40 pm - 10:48 amSTL-IAH
17h 08m1 stop
Logo
7:00 am - 1:32 pmIAH-STL
6h 32m1 stop
$196
Find Deal
mar., ago. 12 - jue., ago. 14
Logo
7:29 pm - 11:49 pmSTL-IAH
28h 20m1 stop
Logo
6:10 am - 1:32 pmIAH-STL
7h 22m1 stop
$199
Find Deal
vie., ago. 15 - dom., ago. 24
Frontier Logo
7:54 pm - 11:36 pmSTL-IAH
27h 42m1 stop
Frontier Logo
7:30 am - 9:11 amIAH-STL
25h 41m1 stop
$205Frontier
Find Deal
mié., ago. 27 - mar., sep. 2
Frontier Logo
7:54 pm - 10:39 amSTL-IAH
14h 45m1 stop
Frontier Logo
8:08 pm - 9:11 amIAH-STL
13h 03m1 stop
$207Frontier
Find Deal
sáb., ago. 23 - lun., ago. 25
United Airlines Logo
8:20 am - 10:39 amSTL-IAH
2h 19mnonstop
United Airlines Logo
4:50 pm - 6:58 pmIAH-STL
2h 08mnonstop
$251United Airlines
Find Deal
jue., ago. 21 - jue., ago. 21
American Airlines Logo
7:01 am - 1:47 pmSTL-IAH
6h 46m1 stop
American Airlines Logo
6:24 pm - 11:51 pmIAH-STL
5h 27m1 stop
$271American Airlines
Find Deal
jue., ago. 21 - jue., ago. 21
United Airlines Logo
8:20 am - 10:39 amSTL-IAH
2h 19mnonstop
United Airlines Logo
7:50 am - 10:01 amIAH-STL
2h 11mnonstop
$282United Airlines
Find Deal
jue., ago. 21 - vie., ago. 22

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

Our best Spirit Airlines deals on St. Louis to Houston George Bush Intcntl Airport flight tickets
Spirit Airlines
Aug 21
STL2:30 pmLambert-St Louis
5h 13m
1 stop
IAH7:43 pmHouston George Bush Intcntl
Aug 22
IAH6:10 amHouston George Bush Intcntl
7h 22m
1 stop
STL1:32 pmLambert-St Louis
$137
Find similar
Spirit Airlines
Aug 18
STL2:30 pmLambert-St Louis
5h 13m
1 stop
IAH7:43 pmHouston George Bush Intcntl
Aug 22
IAH6:10 amHouston George Bush Intcntl
7h 22m
1 stop
STL1:32 pmLambert-St Louis
$147
Find similar
Spirit Airlines
Aug 31
STL2:30 pmLambert-St Louis
5h 13m
1 stop
IAH7:43 pmHouston George Bush Intcntl
Sep 6
IAH6:45 amHouston George Bush Intcntl
28h 05m
1 stop
STL10:50 amLambert-St Louis
$153
Find similar

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 21
STL8:20 amLambert-St Louis
2h 19m
IAH10:39 amHouston George Bush Intcntl
Aug 21
IAH4:50 pmHouston George Bush Intcntl
2h 08m
STL6:58 pmLambert-St Louis
$251
Find similar
United Airlines
Aug 21
STL8:20 amLambert-St Louis
2h 19m
IAH10:39 amHouston George Bush Intcntl
Aug 22
IAH7:50 amHouston George Bush Intcntl
2h 11m
STL10:01 amLambert-St Louis
$282
Find similar
United Airlines
Aug 14
STL6:15 amLambert-St Louis
2h 12m
IAH8:27 amHouston George Bush Intcntl
Aug 28
IAH4:50 pmHouston George Bush Intcntl
2h 08m
STL6:58 pmLambert-St Louis
$320
Find similar

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 julio 31, 2025.
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

jue. 8/21

2:30 pm-7:43 pm

1 stop5h 13m

Houston George Bush Intcntl

vie. 8/22

6:10 am-1:32 pm

1 stop7h 22m

$137

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

lun. 8/18

2:30 pm-7:43 pm

1 stop5h 13m

Houston George Bush Intcntl

vie. 8/22

6:10 am-1:32 pm

1 stop7h 22m

$147

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

dom. 8/31

2:30 pm-7:43 pm

1 stop5h 13m

Houston George Bush Intcntl

sáb. 9/6

6:45 am-10:50 am

1 stop28h 05m

$153

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

mar. 8/12

5:40 pm-10:48 am

1 stop17h 08m

Houston George Bush Intcntl

jue. 8/14

7:00 am-1:32 pm

1 stop6h 32m

$196

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

vie. 8/15

7:29 pm-11:49 pm

1 stop28h 20m

Houston George Bush Intcntl

dom. 8/24

6:10 am-1:32 pm

1 stop7h 22m

$199

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

mié. 8/27

7:54 pm-11:36 pm

1 stop27h 42m

Houston George Bush Intcntl

mar. 9/2

7:30 am-9:11 am

1 stop25h 41m

$205

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

sáb. 8/23

7:54 pm-10:39 am

1 stop14h 45m

Houston George Bush Intcntl

lun. 8/25

8:08 pm-9:11 am

1 stop13h 03m

$207

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

jue. 8/21

8:20 am-10:39 am

Nonstop2h 19m

Houston George Bush Intcntl

jue. 8/21

4:50 pm-6:58 pm

Nonstop2h 08m

$251

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

jue. 8/21

7:01 am-1:47 pm

1 stop6h 46m

Houston George Bush Intcntl

jue. 8/21

6:24 pm-11:51 pm

1 stop5h 27m

$271

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

jue. 8/21

8:20 am-10:39 am

Nonstop2h 19m

Houston George Bush Intcntl

vie. 8/22

7:50 am-10:01 am

Nonstop2h 11m

$282

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 May is, on average, the cheapest month to fly to Houston George Bush Intcntl Airport from St. Louis, with most prices found around $344. If you are unable to visit Houston George Bush Intcntl Airport during the month of May, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $350.

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 Wednesday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Wednesday will often find tickets for as low as $563. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Houston George Bush Intcntl Airport on Saturday is $643.

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 evening. Our users have found flights to Houston George Bush Intcntl Airport in the evening for as low as $240. 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 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 $401 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 $268 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?

You could potentially save up to 19% 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 July 2025, prices for St. Louis to Houston George Bush Intcntl Airport flights are approximately 14% cheaper 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

$54

Fastest flight time

2h 11m

Direct flights

Every day
The best one-way flight to Houston George Bush Intcntl Airport from St. Louis in the past 72 hours is $54. The best round-trip flight deal from St. Louis to Houston George Bush Intcntl Airport found on momondo in the last 72 hours is $137.
The fastest flight from St. Louis to Houston George Bush Intcntl Airport takes 2h 11m
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 19m.

  • 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 $107Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $232Free CancellationRating
7.4
8,900 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 16 times per week, with 8,900 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 $232 (round-trip), much lower than the average airfare cost of $418 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
The Woodlands
Katy
Conroe
Humble
Cypress
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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