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Cheap flights from Houston George Bush Intcntl Airport to St. Louis 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 Houston George Bush Intcntl Airport to St. Louis departing on 10/2. 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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Find the cheapest flights from Houston George Bush Intcntl Airport to St. Louis

Cheap round-trip flights

Frontier Logo
6:10 am - 4:01 pmIAH-STL
9h 51m1 stop
Frontier Logo
11:23 am - 5:01 pmSTL-IAH
5h 38m1 stop
$143Frontier
Find Deal
vie., nov. 7 - dom., nov. 9
Frontier Logo
6:00 am - 9:07 amIAH-STL
27h 07m1 stop
Frontier Logo
8:40 pm - 10:37 amSTL-IAH
13h 57m1 stop
$144Frontier
Find Deal
mié., oct. 22 - mié., oct. 29
Frontier Logo
6:05 am - 3:04 pmIAH-STL
8h 59m1 stop
Frontier Logo
11:32 am - 10:03 pmSTL-IAH
10h 31m1 stop
$152Frontier
Find Deal
dom., oct. 5 - jue., oct. 9
Frontier Logo
7:42 pm - 4:20 pmIAH-STL
20h 38m1 stop
Frontier Logo
7:45 pm - 10:37 amSTL-IAH
14h 52m1 stop
$154Frontier
Find Deal
jue., nov. 13 - dom., nov. 16
Frontier Logo
6:10 am - 4:01 pmIAH-STL
9h 51m1 stop
Frontier Logo
11:23 am - 5:01 pmSTL-IAH
5h 38m1 stop
$161Frontier
Find Deal
vie., nov. 7 - dom., nov. 9
Frontier Logo
6:00 am - 9:07 amIAH-STL
27h 07m1 stop
Frontier Logo
7:52 pm - 10:29 amSTL-IAH
14h 37m1 stop
$163Frontier
Find Deal
lun., oct. 13 - mar., oct. 14
Frontier Logo
6:00 am - 9:07 amIAH-STL
27h 07m1 stop
Frontier Logo
6:47 pm - 4:38 pmSTL-IAH
21h 51m1 stop
$164Frontier
Find Deal
mié., oct. 8 - sáb., oct. 11
Frontier Logo
8:48 pm - 10:07 amIAH-STL
13h 19m1 stop
Frontier Logo
11:27 am - 10:03 pmSTL-IAH
10h 36m1 stop
$166Frontier
Find Deal
sáb., nov. 1 - dom., nov. 2
Multiple Airlines Logo
10:12 pm - 9:22 amIAH-STL
11h 10m2 stops
Multiple Airlines Logo
8:40 pm - 10:37 amSTL-IAH
13h 57m1 stop
$196Multiple Airlines
Find Deal
mié., oct. 22 - mié., oct. 29
Spirit Airlines Logo
5:45 am - 1:53 pmIAH-STL
8h 08m1 stop
Spirit Airlines Logo
12:20 pm - 11:30 pmSTL-IAH
11h 10m1 stop
$246Spirit Airlines
Find Deal
sáb., ene. 31 - jue., feb. 26

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

Our best Frontier deals on Houston George Bush Intcntl Airport to St. Louis flight tickets
Frontier
Nov 7
IAH6:10 amHouston George Bush Intcntl
9h 51m
1 stop
STL4:01 pmLambert-St Louis
Nov 9
STL11:23 amLambert-St Louis
5h 38m
1 stop
IAH5:01 pmHouston George Bush Intcntl
$143
Find similar
Frontier
Oct 22
IAH6:00 amHouston George Bush Intcntl
27h 07m
1 stop
STL9:07 amLambert-St Louis
Oct 29
STL8:40 pmLambert-St Louis
13h 57m
1 stop
IAH10:37 amHouston George Bush Intcntl
$144
Find similar
Frontier
Oct 3
IAH9:08 pmHouston George Bush Intcntl
11h 58m
1 stop
STL9:06 amLambert-St Louis
Oct 6
STL4:00 pmLambert-St Louis
5h 53m
1 stop
IAH9:53 pmHouston George Bush Intcntl
$152
Find similar

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

Our best United Airlines deals on Houston George Bush Intcntl Airport to St. Louis flight tickets
United Airlines
Oct 9
IAH5:00 pmHouston George Bush Intcntl
1h 57m
STL6:57 pmLambert-St Louis
Oct 29
STL8:20 amLambert-St Louis
2h 20m
IAH10:40 amHouston George Bush Intcntl
$380
Find similar
United Airlines
Oct 9
IAH9:30 amHouston George Bush Intcntl
6h 14m
1 stop
STL3:44 pmLambert-St Louis
Oct 29
STL11:20 amLambert-St Louis
2h 25m
IAH1:45 pmHouston George Bush Intcntl
$390
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Houston George Bush Intcntl Airport to St. Louis 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 septiembre 25, 2025.
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

vie. 11/7

6:10 am-4:01 pm

1 stop9h 51m

Lambert-St Louis

dom. 11/9

11:23 am-5:01 pm

1 stop5h 38m

$143

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mié. 10/22

6:00 am-9:07 am

1 stop27h 07m

Lambert-St Louis

mié. 10/29

8:40 pm-10:37 am

1 stop13h 57m

$144

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

dom. 10/5

6:05 am-3:04 pm

1 stop8h 59m

Lambert-St Louis

jue. 10/9

11:32 am-10:03 pm

1 stop10h 31m

$152

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

jue. 11/13

7:42 pm-4:20 pm

1 stop20h 38m

Lambert-St Louis

dom. 11/16

7:45 pm-10:37 am

1 stop14h 52m

$154

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

vie. 11/7

6:10 am-4:01 pm

1 stop9h 51m

Lambert-St Louis

dom. 11/9

11:23 am-5:01 pm

1 stop5h 38m

$161

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

lun. 10/13

6:00 am-9:07 am

1 stop27h 07m

Lambert-St Louis

mar. 10/14

7:52 pm-10:29 am

1 stop14h 37m

$163

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mié. 10/8

6:00 am-9:07 am

1 stop27h 07m

Lambert-St Louis

sáb. 10/11

6:47 pm-4:38 pm

1 stop21h 51m

$164

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

sáb. 11/1

8:48 pm-10:07 am

1 stop13h 19m

Lambert-St Louis

dom. 11/2

11:27 am-10:03 pm

1 stop10h 36m

$166

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mié. 10/22

10:12 pm-9:22 am

2 stops11h 10m

Lambert-St Louis

mié. 10/29

8:40 pm-10:37 am

1 stop13h 57m

$196

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

sáb. 1/31

5:45 am-1:53 pm

1 stop8h 08m

Lambert-St Louis

jue. 2/26

12:20 pm-11:30 pm

1 stop11h 10m

$246

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 St. Louis from

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

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 St. Louis?

In general, October is the cheapest month to fly from Houston George Bush Intcntl Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $318. The month of May is another great option to travel to St. Louis, with average flight prices from Houston George Bush Intcntl Airport averaging around $337.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $281. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $468. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Houston George Bush Intcntl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $341 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $378 per ticket.

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

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

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Houston George Bush Intcntl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $384 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Houston George Bush Intcntl Airport for as low as $234 on momondo.

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

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

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

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

As of September 2025, prices for Houston George Bush Intcntl Airport to St. Louis flights are approximately 36% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$206

Fastest flight time

1h 57m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Houston George Bush Intcntl Airport in the past 72 hours is $206. The best round-trip flight deal from Houston George Bush Intcntl Airport to St. Louis found on momondo in the last 72 hours is $149.
The fastest flight from Houston George Bush Intcntl Airport to St. Louis takes 1h 57m
Direct flights go from Houston George Bush Intcntl Airport to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

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

    The straight-line distance from Houston George Bush Intcntl to Lambert-St Louis is 664.5 mi. 8h 08m is a normal flight duration for this route.

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

    Prices for flights from Houston George Bush Intcntl Airport to Lambert-St Louis Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Houston George Bush Intcntl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

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

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $130Free CancellationRating
5.8
3,163 reviews
Search Frontier flights
United AirlinesPriceFrom $177Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
American AirlinesPriceFrom $180Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

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

    United Airlines operates around 20 flights from Houston George Bush Intcntl Airport to St. Louis every week. The average price of these flights found in the last 72 hours has been $387, but momondo users have found United Airlines deals from Houston George Bush Intcntl Airport to St. Louis from as low as $177 round-trip. United Airlines has been scored 7.4/10 in 8,928 reviews.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Houston to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Houston to St. Louis flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Houston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Houston and alert you when they change.

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