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Cheap flights from Houston to St. Louis from $57

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 1/13. 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
0 bags

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Find the cheapest flights from Houston to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:55 pm - 10:00 pm
IAH
-
STL
2h 05mnonstop
United Airlines Logo
6:00 am - 8:30 am
STL
-
IAH
2h 30mnonstop
$140United Airlines
Tue, Jan 6 - Wed, Jan 14
United Airlines Logo
7:20 am - 9:22 am
IAH
-
STL
2h 02mnonstop
United Airlines Logo
10:07 am - 12:38 pm
STL
-
IAH
2h 31mnonstop
$145United Airlines
Wed, Jan 7 - Fri, Jan 9
Frontier Logo
8:13 pm - 10:33 pm
IAH
-
STL
26h 20m1 stop
Frontier Logo
5:11 pm - 6:58 pm
STL
-
IAH
25h 47m1 stop
$146Frontier
Tue, Jan 6 - Tue, Jan 13
Frontier Logo
9:34 pm - 10:33 pm
IAH
-
STL
24h 59m1 stop
Frontier Logo
5:11 pm - 6:58 pm
STL
-
IAH
25h 47m1 stop
$147Frontier
Mon, Jan 5 - Tue, Jan 13
American Airlines Logo
6:00 am - 11:03 am
HOU
-
STL
5h 03m1 stop
American Airlines Logo
3:40 pm - 10:46 pm
STL
-
HOU
7h 06m1 stop
$159American Airlines
Tue, Feb 10 - Tue, Feb 10
American Airlines Logo
6:00 am - 11:03 am
IAH
-
STL
5h 03m1 stop
American Airlines Logo
3:54 pm - 11:59 pm
STL
-
IAH
8h 05m1 stop
$159American Airlines
Tue, Feb 10 - Tue, Feb 10
Southwest Logo
6:35 pm - 8:35 pm
HOU
-
STL
2h 00mnonstop
Southwest Logo
3:50 pm - 8:15 pm
STL
-
HOU
4h 25m1 stop
$168Southwest
Tue, Jan 6 - Wed, Jan 14
Southwest Logo
5:40 am - 7:35 am
HOU
-
STL
1h 55mnonstop
Southwest Logo
11:35 am - 5:45 pm
STL
-
HOU
6h 10m2 stops
$173Southwest
Tue, Jan 6 - Wed, Jan 14
Delta Logo
5:25 am - 11:02 am
HOU
-
STL
5h 37m1 stop
Delta Logo
7:10 am - 3:03 pm
STL
-
HOU
7h 53m1 stop
$177Delta
Tue, Feb 17 - Sat, Feb 21
Delta Logo
5:45 am - 11:05 am
HOU
-
STL
5h 20m1 stop
Delta Logo
9:59 am - 4:10 pm
STL
-
HOU
6h 11m1 stop
$180Delta
Tue, Jan 6 - Thu, Jan 15

United Airlines flights from Houston to St. Louis

Our best United Airlines deals on Houston to St. Louis flight tickets
United Airlines
Jan 6
IAH7:55 pmHouston George Bush Intcntl
2h 05m
STL10:00 pmLambert-St Louis
Jan 14
STL6:00 amLambert-St Louis
2h 30m
IAH8:30 amHouston George Bush Intcntl
$140
Find similar
United Airlines
Jan 7
IAH7:20 amHouston George Bush Intcntl
2h 02m
STL9:22 amLambert-St Louis
Jan 9
STL10:07 amLambert-St Louis
2h 31m
IAH12:38 pmHouston George Bush Intcntl
$145
Find similar
United Airlines
Jan 25
IAH7:20 amHouston George Bush Intcntl
2h 02m
STL9:22 amLambert-St Louis
Jan 25
STL4:35 pmLambert-St Louis
2h 30m
IAH7:05 pmHouston George Bush Intcntl
$163
Find similar

Frontier flights from Houston to St. Louis

Our best Frontier deals on Houston to St. Louis flight tickets
Frontier
Jan 6
IAH8:13 pmHouston George Bush Intcntl
26h 20m
1 stop
STL10:33 pmLambert-St Louis
Jan 13
STL5:11 pmLambert-St Louis
25h 47m
1 stop
IAH6:58 pmHouston George Bush Intcntl
$146
Find similar
Frontier
Jan 5
IAH9:34 pmHouston George Bush Intcntl
24h 59m
1 stop
STL10:33 pmLambert-St Louis
Jan 13
STL5:11 pmLambert-St Louis
25h 47m
1 stop
IAH6:58 pmHouston George Bush Intcntl
$147
Find similar
Frontier
Jan 8
IAH6:05 amHouston George Bush Intcntl
8h 43m
1 stop
STL2:48 pmLambert-St Louis
Jan 11
STL5:11 pmLambert-St Louis
16h 50m
1 stop
IAH10:01 amHouston George Bush Intcntl
$156
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 December 4, 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

Tue 1/6

7:55 pm-10:00 pm

Nonstop2h 05m

Lambert-St Louis

Wed 1/14

6:00 am-8:30 am

Nonstop2h 30m

$140

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 1/7

7:20 am-9:22 am

Nonstop2h 02m

Lambert-St Louis

Fri 1/9

10:07 am-12:38 pm

Nonstop2h 31m

$145

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 1/6

8:13 pm-10:33 pm

1 stop26h 20m

Lambert-St Louis

Tue 1/13

5:11 pm-6:58 pm

1 stop25h 47m

$146

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 1/5

9:34 pm-10:33 pm

1 stop24h 59m

Lambert-St Louis

Tue 1/13

5:11 pm-6:58 pm

1 stop25h 47m

$147

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 2/10

6:00 am-11:03 am

1 stop5h 03m

Lambert-St Louis

Tue 2/10

3:40 pm-10:46 pm

1 stop7h 06m

$159

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 2/10

6:00 am-11:03 am

1 stop5h 03m

Lambert-St Louis

Tue 2/10

3:54 pm-11:59 pm

1 stop8h 05m

$159

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 1/6

6:35 pm-8:35 pm

Nonstop2h 00m

Lambert-St Louis

Wed 1/14

3:50 pm-8:15 pm

1 stop4h 25m

$168

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 1/6

5:40 am-7:35 am

Nonstop1h 55m

Lambert-St Louis

Wed 1/14

11:35 am-5:45 pm

2 stops6h 10m

$173

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 2/17

5:25 am-11:02 am

1 stop5h 37m

Lambert-St Louis

Sat 2/21

7:10 am-3:03 pm

1 stop7h 53m

$177

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 1/6

5:45 am-11:05 am

1 stop5h 20m

Lambert-St Louis

Thu 1/15

9:59 am-4:10 pm

1 stop6h 11m

$180

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 cheapest month to fly to St. Louis?

In general, September 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 $249. The month of October is another great option to travel to St. Louis, with average flight prices from Houston averaging around $262.

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 $416. 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 $335 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 $370 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 $342 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 $284 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 $109Free CancellationRating
5.8
3,092 reviews
Search Frontier flights
United AirlinesPriceFrom $149Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
American AirlinesPriceFrom $180Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
SouthwestPriceFrom $200Free CancellationRating
8.0
4,253 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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
Collinsville
St. Peters
Alton
Farmington
Clayton
Festus
Glencoe
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.

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