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Cheap flights from Houston to St. Louis from $71

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 to St. Louis departing on 10/3. 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

Frontier Logo
6:05 am - 3:04 pmIAH-STL
8h 59m1 stop
Frontier Logo
4:00 pm - 9:53 pmSTL-IAH
5h 53m1 stop
$143Frontier
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Thu, Sep 18 - Mon, Sep 22
Frontier Logo
6:05 am - 3:04 pmIAH-STL
8h 59m1 stop
Frontier Logo
4:00 pm - 4:34 pmSTL-IAH
24h 34m1 stop
$160Frontier
Find Deal
Thu, Sep 18 - Mon, Sep 22
Logo
4:37 pm - 9:07 amIAH-STL
16h 30m1 stop
Logo
12:20 pm - 8:33 pmSTL-IAH
8h 13m1 stop
$187
Find Deal
Wed, Nov 5 - Thu, Nov 13
Logo
7:30 am - 9:06 amIAH-STL
25h 36m1 stop
Logo
4:00 pm - 10:30 pmSTL-IAH
6h 30m1 stop
$195
Find Deal
Tue, Sep 30 - Thu, Oct 2
Spirit Airlines Logo
5:34 am - 5:45 pmIAH-STL
12h 11m1 stop
Spirit Airlines Logo
10:57 am - 8:55 amSTL-IAH
21h 58m1 stop
$206Spirit Airlines
Find Deal
Sat, Nov 1 - Sun, Nov 2
Spirit Airlines Logo
8:10 pm - 5:45 pmIAH-STL
21h 35m1 stop
Spirit Airlines Logo
10:57 am - 12:24 amSTL-IAH
13h 27m1 stop
$234Spirit Airlines
Find Deal
Fri, Oct 10 - Tue, Oct 14
Southwest Logo
2:00 pm - 4:00 pmHOU-STL
2h 00mnonstop
Southwest Logo
5:20 pm - 7:25 pmSTL-HOU
2h 05mnonstop
$277Southwest
Find Deal
Wed, Sep 17 - Wed, Sep 24
American Airlines Logo
2:33 pm - 10:50 pmHOU-STL
8h 17m1 stop
American Airlines Logo
9:44 am - 6:10 pmSTL-HOU
8h 26m1 stop
$283American Airlines
Find Deal
Wed, Sep 17 - Wed, Sep 24
Southwest Logo
12:45 pm - 2:45 pmHOU-STL
2h 00mnonstop
Southwest Logo
2:50 pm - 4:55 pmSTL-HOU
2h 05mnonstop
$284Southwest
Find Deal
Thu, Oct 2 - Tue, Oct 7
American Airlines Logo
10:15 am - 6:22 pmHOU-STL
8h 07m1 stop
American Airlines Logo
3:59 pm - 8:11 pmSTL-HOU
4h 12m1 stop
$297American Airlines
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Tue, Sep 23 - Sat, Sep 27

Delta flights from Houston to St. Louis

Our best Delta deals on Houston to St. Louis flight tickets
Delta
Nov 4
HOU6:00 amHouston Hobby
4h 26m
1 stop
STL10:26 amLambert-St Louis
Nov 18
STL11:51 amLambert-St Louis
4h 36m
1 stop
HOU4:27 pmHouston Hobby
$298
Find similar
Delta
Dec 18
HOU6:00 amHouston Hobby
6h 57m
1 stop
STL12:57 pmLambert-St Louis
Dec 31
STL7:15 amLambert-St Louis
6h 55m
1 stop
HOU2:10 pmHouston Hobby
$304
Find similar
Delta
Oct 23
HOU6:00 amHouston Hobby
4h 26m
1 stop
STL10:26 amLambert-St Louis
Nov 1
STL10:30 amLambert-St Louis
7h 18m
1 stop
HOU5:48 pmHouston Hobby
$311
Find similar

American Airlines flights from Houston to St. Louis

Our best American Airlines deals on Houston to St. Louis flight tickets
American Airlines
Sep 17
HOU2:33 pmHouston Hobby
8h 17m
1 stop
STL10:50 pmLambert-St Louis
Sep 24
STL9:44 amLambert-St Louis
8h 26m
1 stop
HOU6:10 pmHouston Hobby
$283
Find similar
American Airlines
Sep 23
HOU10:15 amHouston Hobby
8h 07m
1 stop
STL6:22 pmLambert-St Louis
Sep 27
STL3:59 pmLambert-St Louis
4h 12m
1 stop
HOU8:11 pmHouston Hobby
$297
Find similar
American Airlines
Aug 30
HOU8:51 amHouston Hobby
9h 39m
1 stop
STL6:30 pmLambert-St Louis
Sep 2
STL10:08 amLambert-St Louis
5h 42m
1 stop
HOU3:50 pmHouston Hobby
$509
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Houston 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 August 21, 2025.
Use the filters below to find and compare flights from Houston 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

Thu 9/18

6:05 am-3:04 pm

1 stop8h 59m

Lambert-St Louis

Mon 9/22

4:00 pm-9:53 pm

1 stop5h 53m

$143

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 9/18

6:05 am-3:04 pm

1 stop8h 59m

Lambert-St Louis

Mon 9/22

4:00 pm-4:34 pm

1 stop24h 34m

$160

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 11/5

4:37 pm-9:07 am

1 stop16h 30m

Lambert-St Louis

Thu 11/13

12:20 pm-8:33 pm

1 stop8h 13m

$187

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 9/30

7:30 am-9:06 am

1 stop25h 36m

Lambert-St Louis

Thu 10/2

4:00 pm-10:30 pm

1 stop6h 30m

$195

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 11/1

5:34 am-5:45 pm

1 stop12h 11m

Lambert-St Louis

Sun 11/2

10:57 am-8:55 am

1 stop21h 58m

$206

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 10/10

8:10 pm-5:45 pm

1 stop21h 35m

Lambert-St Louis

Tue 10/14

10:57 am-12:24 am

1 stop13h 27m

$234

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 9/17

2:00 pm-4:00 pm

Nonstop2h 00m

Lambert-St Louis

Wed 9/24

5:20 pm-7:25 pm

Nonstop2h 05m

$277

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Wed 9/17

2:33 pm-10:50 pm

1 stop8h 17m

Lambert-St Louis

Wed 9/24

9:44 am-6:10 pm

1 stop8h 26m

$283

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 10/2

12:45 pm-2:45 pm

Nonstop2h 00m

Lambert-St Louis

Tue 10/7

2:50 pm-4:55 pm

Nonstop2h 05m

$284

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 9/23

10:15 am-6:22 pm

1 stop8h 07m

Lambert-St Louis

Sat 9/27

3:59 pm-8:11 pm

1 stop4h 12m

$297

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 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 and St. Louis?

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

In general, April is the cheapest month to fly from Houston to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $264. The month of August is another great option to travel to St. Louis, with average flight prices from Houston averaging around $293.

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 $315. 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 in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $369 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 $382 per ticket.

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

Fly from Houston Hobby to Lambert-St Louis for the best Houston - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $351 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 for as low as $255 on momondo.

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

There are 4 cabin classes available to choose from on Houston 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.

Cheap Houston to St. Louis flight deals and tips

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

Fastest flight time

1h 55m

Direct flights

Every day

Airports in St. Louis

1 airport
The fastest flight from Houston to St. Louis takes 1h 55m
Direct flights go from Houston to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

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

    Houston and Lambert-St Louis are 679.6 mi apart from one another. Typically, this will take 1h 55m by plane in normal conditions.

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

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

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

  • How old do you have to be to fly from Houston 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 to Lambert-St Louis Airport.

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

    The necessary travel and health documents for your Lambert-St Louis 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.

Best airlines flying from Houston to St. Louis

Compare and see reviews for airlines that fly from Houston to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $106Free CancellationRating
5.8
3,207 reviews
Search Frontier flights
United AirlinesPriceFrom $161Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
American AirlinesPriceFrom $180Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $213Free CancellationRating
8.0
4,245 reviews
Search Southwest flights

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
Fenton
Collinsville
Wentzville
Alton
St. Peters
Festus
Farmington
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Houston.

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

All flight searches from Houston to St. Louis on momondo can be filtered to show those which offer 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 not ready to book a flight from Houston to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

An easier way to manage your St. Louis trip

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