Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Houston George Bush Intcntl Airport to St. Louis from $81

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 7/21. 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 Houston George Bush Intcntl Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:15 pm - 10:30 pm
IAH
-
STL
2h 15mnonstop
United Airlines Logo
6:15 am - 8:27 am
STL
-
IAH
2h 12mnonstop
$284United Airlines
Thu, Oct 8 - Sat, Oct 10
Frontier Logo
1:35 pm - 9:40 am
IAH
-
STL
20h 05m
1 stop
Frontier Logo
10:35 am - 7:34 am
STL
-
IAH
20h 59m
1 stop
$285Frontier
Wed, Nov 4 - Sun, Nov 8
Frontier Logo
8:20 am - 8:57 am
IAH
-
STL
24h 37m
2 stops
Frontier Logo
4:57 pm - 7:20 am
STL
-
IAH
14h 23m
1 stop
$287Frontier
Fri, Jul 10 - Mon, Jul 13
Frontier Logo
8:37 pm - 2:56 pm
IAH
-
STL
18h 19m
2 stops
Frontier Logo
6:34 pm - 10:03 am
STL
-
IAH
15h 29m
1 stop
$290Frontier
Fri, Jul 24 - Sun, Jul 26
American Airlines Logo
6:37 pm - 12:14 am
IAH
-
STL
5h 37m
1 stop
American Airlines Logo
8:36 am - 1:19 pm
STL
-
IAH
4h 43m
1 stop
$291American Airlines
Wed, Aug 5 - Tue, Aug 11
Frontier Logo
8:50 am - 5:37 pm
IAH
-
STL
8h 47m
1 stop
Frontier Logo
4:57 pm - 10:39 pm
STL
-
IAH
5h 42m
1 stop
$292Frontier
Sun, Jul 12 - Sat, Jul 18
Frontier Logo
8:02 pm - 8:57 am
IAH
-
STL
12h 55m
1 stop
Frontier Logo
7:10 pm - 8:45 am
STL
-
IAH
13h 35m
2 stops
$294Frontier
Fri, Aug 7 - Sun, Aug 9
Frontier Logo
8:50 am - 11:59 pm
IAH
-
STL
15h 09m
2 stops
Frontier Logo
6:34 pm - 7:20 am
STL
-
IAH
12h 46m
1 stop
$295Frontier
Thu, Jul 16 - Sun, Jul 19
Frontier Logo
6:00 am - 7:23 pm
IAH
-
STL
13h 23m
2 stops
Frontier Logo
6:34 pm - 7:20 am
STL
-
IAH
12h 46m
1 stop
$296Frontier
Fri, Aug 7 - Sun, Aug 9
United Airlines Logo
8:00 am - 10:10 am
IAH
-
STL
2h 10mnonstop
United Airlines Logo
8:35 am - 10:52 am
STL
-
IAH
2h 17mnonstop
$297United Airlines
Thu, Aug 20 - Mon, Aug 31

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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

Our best American Airlines deals on Houston George Bush Intcntl Airport to St. Louis flight tickets
American Airlines
Aug 5
IAH6:37 pmHouston George Bush Intcntl
5h 37m
1 stop
STL12:14 amLambert-St Louis
Aug 11
STL8:36 amLambert-St Louis
4h 43m
1 stop
IAH1:19 pmHouston George Bush Intcntl
$291
American Airlines
Aug 8
IAH11:28 amHouston George Bush Intcntl
4h 46m
1 stop
STL4:14 pmLambert-St Louis
Aug 10
STL10:16 amLambert-St Louis
5h 15m
1 stop
IAH3:31 pmHouston George Bush Intcntl
$303
American Airlines
Jul 21
IAH6:13 amHouston George Bush Intcntl
7h 40m
1 stop
STL1:53 pmLambert-St Louis
Jul 23
STL5:32 amLambert-St Louis
5h 25m
1 stop
IAH10:57 amHouston George Bush Intcntl
$363

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 4
IAH1:35 pmHouston George Bush Intcntl
20h 05m
1 stop
STL9:40 amLambert-St Louis
Nov 8
STL10:35 amLambert-St Louis
20h 59m
1 stop
IAH7:34 amHouston George Bush Intcntl
$285
Frontier
Jul 10
IAH8:20 amHouston George Bush Intcntl
24h 37m
2 stops
STL8:57 amLambert-St Louis
Jul 13
STL4:57 pmLambert-St Louis
14h 23m
1 stop
IAH7:20 amHouston George Bush Intcntl
$287
Frontier
Sep 10
IAH7:00 amHouston George Bush Intcntl
10h 44m
2 stops
STL5:44 pmLambert-St Louis
Sep 13
STL10:35 amLambert-St Louis
11h 31m
1 stop
IAH10:06 pmHouston George Bush Intcntl
$290

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 June 26, 2026.
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

Cheapest round-trip
Quickest round-trip

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 10/8

8:15 pm-10:30 pm

Nonstop2h 15m

Lambert-St Louis

Sat 10/10

6:15 am-8:27 am

Nonstop2h 12m

$284

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 11/4

1:35 pm-9:40 am

1 stop20h 05m

Lambert-St Louis

Sun 11/8

10:35 am-7:34 am

1 stop20h 59m

$285

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 7/10

8:20 am-8:57 am

2 stops24h 37m

Lambert-St Louis

Mon 7/13

4:57 pm-7:20 am

1 stop14h 23m

$287

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 7/24

8:37 pm-2:56 pm

2 stops18h 19m

Lambert-St Louis

Sun 7/26

6:34 pm-10:03 am

1 stop15h 29m

$290

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 8/5

6:37 pm-12:14 am

1 stop5h 37m

Lambert-St Louis

Tue 8/11

8:36 am-1:19 pm

1 stop4h 43m

$291

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sun 7/12

8:50 am-5:37 pm

1 stop8h 47m

Lambert-St Louis

Sat 7/18

4:57 pm-10:39 pm

1 stop5h 42m

$292

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 8/7

8:02 pm-8:57 am

1 stop12h 55m

Lambert-St Louis

Sun 8/9

7:10 pm-8:45 am

2 stops13h 35m

$294

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 7/16

8:50 am-11:59 pm

2 stops15h 09m

Lambert-St Louis

Sun 7/19

6:34 pm-7:20 am

1 stop12h 46m

$295

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 8/7

6:00 am-7:23 pm

2 stops13h 23m

Lambert-St Louis

Sun 8/9

6:34 pm-7:20 am

1 stop12h 46m

$296

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 8/20

8:00 am-10:10 am

Nonstop2h 10m

Lambert-St Louis

Mon 8/31

8:35 am-10:52 am

Nonstop2h 17m

$297

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

What is the cheapest month to fly to St. Louis?

In general, September 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 $281. The month of October is another great option to travel to St. Louis, with average flight prices from Houston George Bush Intcntl Airport averaging around $317.

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 Wednesday when prices can be found for as low as $291. 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 $426. 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 $366 when looking at flights departing in the afternoon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $474 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

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

There are 3 cabin classes available to choose from on Houston George Bush Intcntl Airport to 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?

You could potentially save up to 8% on your flight if you consider stops on a Houston George Bush Intcntl Airport to St. Louis flight.

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

As of June 2026, prices for Houston George Bush Intcntl Airport to St. Louis flights are approximately 59% 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

$247

Fastest flight time

1h 59m

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 $247. The best round-trip flight deal from Houston George Bush Intcntl Airport to St. Louis found on momondo in the last 72 hours is $437.
The fastest flight from Houston George Bush Intcntl Airport to St. Louis takes 1h 59m
Direct flights go from Houston George Bush Intcntl Airport to St. Louis every day.
There is 1 airport in St. Louis. From Houston George Bush Intcntl Airport there are direct flights to Lambert-St Louis (STL).
Search flight deals

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

  • 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. 1h 59m 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 $111Free CancellationRating
5.6
2,866 reviews
Search Frontier flights
United AirlinesPriceFrom $251Free CancellationRating
7.4
9,889 reviews
Search United Airlines flights

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

    United Airlines operates around 28 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 $500, but momondo users have found United Airlines deals from Houston George Bush Intcntl Airport to St. Louis from as low as $251 round-trip. United Airlines has been scored 7.4/10 in 9,889 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
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Alton
Wentzville
Farmington
Fenton
Clayton
Festus
Eureka
Litchfield
Edwardsville
Grafton
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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 7/26
Sun 8/2
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States