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Cheap flights from St. Louis to Houston from $55

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 11/20. 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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Frontier Logo
7:45 pm - 9:52 pmSTL-IAH
26h 07m1 stop
Frontier Logo
2:09 pm - 9:07 amIAH-STL
18h 58m1 stop
$143Frontier
Find Deal
Mon, Nov 10 - Wed, Nov 12
Frontier Logo
7:57 pm - 11:38 pmSTL-IAH
27h 41m1 stop
Frontier Logo
8:07 pm - 10:33 pmIAH-STL
26h 26m1 stop
$144Frontier
Find Deal
Thu, Nov 20 - Fri, Dec 5
Frontier Logo
12:04 pm - 10:50 pmSTL-IAH
10h 46m1 stop
Frontier Logo
4:50 pm - 9:47 amIAH-STL
16h 57m1 stop
$145Frontier
Find Deal
Thu, Dec 4 - Sat, Dec 6
Multiple Airlines Logo
5:11 pm - 8:54 amSTL-IAH
15h 43m1 stop
Multiple Airlines Logo
7:00 am - 10:33 pmIAH-STL
15h 33m2 stops
$150Multiple Airlines
Find Deal
Wed, Jan 28 - Wed, Feb 4
Frontier Logo
4:56 pm - 10:10 pmSTL-IAH
5h 14m1 stop
Frontier Logo
6:00 am - 9:07 amIAH-STL
27h 07m1 stop
$151Frontier
Find Deal
Fri, Nov 14 - Sun, Nov 16
Frontier Logo
5:11 pm - 8:54 amSTL-IAH
15h 43m1 stop
Frontier Logo
6:45 am - 10:02 amIAH-STL
27h 17m1 stop
$153Frontier
Find Deal
Fri, Jan 30 - Sun, Feb 1
Frontier Logo
7:45 pm - 10:37 amSTL-IAH
14h 52m1 stop
Frontier Logo
6:00 am - 9:07 amIAH-STL
27h 07m1 stop
$158Frontier
Find Deal
Wed, Nov 12 - Sun, Nov 16
Multiple Airlines Logo
10:42 am - 10:31 pmSTL-IAH
11h 49m1 stop
Multiple Airlines Logo
7:00 am - 10:33 pmIAH-STL
15h 33m1 stop
$162Multiple Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 11
Multiple Airlines Logo
10:42 am - 10:50 pmSTL-IAH
12h 08m1 stop
Multiple Airlines Logo
4:06 pm - 9:52 amIAH-STL
17h 46m1 stop
$166Multiple Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Frontier Logo
10:42 am - 10:50 pmSTL-IAH
12h 08m1 stop
Frontier Logo
6:05 am - 10:33 pmIAH-STL
16h 28m2 stops
$170Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8

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
Nov 10
STL7:45 pmLambert-St Louis
26h 07m
1 stop
IAH9:52 pmHouston George Bush Intcntl
Nov 12
IAH2:09 pmHouston George Bush Intcntl
18h 58m
1 stop
STL9:07 amLambert-St Louis
$143
Find similar
Frontier
Nov 3
STL12:09 pmLambert-St Louis
8h 17m
1 stop
IAH8:26 pmHouston George Bush Intcntl
Nov 10
IAH8:48 pmHouston George Bush Intcntl
12h 19m
1 stop
STL9:07 amLambert-St Louis
$144
Find similar
Frontier
Dec 4
STL12:04 pmLambert-St Louis
10h 46m
1 stop
IAH10:50 pmHouston George Bush Intcntl
Dec 6
IAH4:50 pmHouston George Bush Intcntl
16h 57m
1 stop
STL9:47 amLambert-St Louis
$145
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 October 30, 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

Mon 11/10

7:45 pm-9:52 pm

1 stop26h 07m

Houston George Bush Intcntl

Wed 11/12

2:09 pm-9:07 am

1 stop18h 58m

$143

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 11/20

7:57 pm-11:38 pm

1 stop27h 41m

Houston George Bush Intcntl

Fri 12/5

8:07 pm-10:33 pm

1 stop26h 26m

$144

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 12/4

12:04 pm-10:50 pm

1 stop10h 46m

Houston George Bush Intcntl

Sat 12/6

4:50 pm-9:47 am

1 stop16h 57m

$145

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 1/28

5:11 pm-8:54 am

1 stop15h 43m

Houston George Bush Intcntl

Wed 2/4

7:00 am-10:33 pm

2 stops15h 33m

$150

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 11/14

4:56 pm-10:10 pm

1 stop5h 14m

Houston George Bush Intcntl

Sun 11/16

6:00 am-9:07 am

1 stop27h 07m

$151

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 1/30

5:11 pm-8:54 am

1 stop15h 43m

Houston George Bush Intcntl

Sun 2/1

6:45 am-10:02 am

1 stop27h 17m

$153

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 11/12

7:45 pm-10:37 am

1 stop14h 52m

Houston George Bush Intcntl

Sun 11/16

6:00 am-9:07 am

1 stop27h 07m

$158

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 1/9

10:42 am-10:31 pm

1 stop11h 49m

Houston George Bush Intcntl

Sun 1/11

7:00 am-10:33 pm

1 stop15h 33m

$162

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 12/5

10:42 am-10:50 pm

1 stop12h 08m

Houston George Bush Intcntl

Sun 12/7

4:06 pm-9:52 am

1 stop17h 46m

$166

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 12/5

10:42 am-10:50 pm

1 stop12h 08m

Houston George Bush Intcntl

Mon 12/8

6:05 am-10:33 pm

2 stops16h 28m

$170

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 August is, on average, the cheapest month to fly to Houston George Bush Intcntl Airport from St. Louis, with most prices found around $303. If you are unable to visit Houston George Bush Intcntl Airport during the month of August, then departing from St. Louis during the month October is also very affordable. Most momondo users find prices during this month for around $317.

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 $565. 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 $617.

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 $656. 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 $374 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 $230 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 October 2025, prices for St. Louis to Houston George Bush Intcntl Airport flights are approximately 25% 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

$206

Fastest flight time

2h 18m

Direct flights

Every day
The best one-way flight to Houston George Bush Intcntl Airport from St. Louis in the past 72 hours is $206. The best round-trip flight deal from St. Louis to Houston George Bush Intcntl Airport found on momondo in the last 72 hours is $390.
The fastest flight from St. Louis to Houston George Bush Intcntl Airport takes 2h 18m
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 5h 14m.

  • 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 $112Free CancellationRating
5.8
3,123 reviews
Search Frontier flights
American AirlinesPriceFrom $167Free CancellationRating
7.2
11,030 reviews
Search American Airlines flights
United AirlinesPriceFrom $218Free CancellationRating
7.4
8,998 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 8,998 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 $218 (round-trip), much lower than the average airfare cost of $408 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
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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