What airlines fly to St. Louis?

Southwest, United Airlines and Frontier are the top three most popular airlines that fly to St. Louis from Houston according to our data. Southwest is the first choice among our users, with 41% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

How many flights depart from Houston to St. Louis on average per day?

The number of flights available between Houston and St. Louis is 13 per day as of December 2025. The most frequent departure time is 2:00PM, with 35% of daily flights leaving in the afternoon.

What is the cheapest airline that flies from Houston to Lambert-St Louis?

Frontier, Southwest, and United Airlines are the most popular carriers operating from Houston to Lambert-St Louis

How many flights depart from Houston to St. Louis on average per week?

The number of flights available between Houston and St. Louis is 96 per week as of December 2025. The most frequent departure day is Mon, with 20% of weekly flights leaving on this day.

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?

The number of operators available for flights from Houston to Lambert-St Louis Airport is 4 as of December 2025.

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.

$63 Cheap Flights from Houston to St. Louis in 2025/26

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Find the cheapest flights from Houston to St. Louis

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:16 pm - 11:33 pm

IAH

STL

11h 17m1 stop

3:49 pm - 11:11 am

STL

IAH

19h 22m1 stop

$132Multiple Airlines

Tue, Feb 3 - Tue, Feb 10

8:13 pm - 10:33 pm

IAH

STL

26h 20m1 stop

5:11 pm - 6:58 pm

STL

IAH

25h 47m1 stop

$133Frontier

Wed, Jan 7 - Tue, Jan 13

3:18 pm - 11:33 pm

IAH

STL

8h 15m1 stop

5:42 pm - 9:00 am

STL

IAH

15h 18m1 stop

$140Multiple Airlines

Wed, Jan 21 - Sun, Jan 25

12:16 pm - 11:33 pm

IAH

STL

11h 17m1 stop

12:12 pm - 7:24 pm

STL

IAH

7h 12m1 stop

$141Multiple Airlines

Thu, Jan 22 - Sat, Jan 24

6:05 pm - 6:51 am

IAH

STL

12h 46m1 stop

5:42 pm - 9:00 am

STL

IAH

15h 18m1 stop

$144Frontier

Fri, Jan 23 - Sun, Jan 25

4:35 pm - 6:51 am

IAH

STL

14h 16m2 stops

5:42 pm - 9:57 pm

STL

IAH

28h 15m1 stop

$145Multiple Airlines

Tue, Jan 20 - Tue, Jan 27

8:18 pm - 10:27 pm

IAH

STL

26h 09m1 stop

10:11 pm - 9:17 pm

STL

IAH

23h 06m1 stop

$147Frontier

Tue, Feb 10 - Thu, Feb 12

2:35 pm - 4:30 pm

HOU

STL

1h 55mnonstop

7:55 pm - 10:10 pm

STL

HOU

2h 15mnonstop

$273Southwest

Tue, Feb 3 - Tue, Feb 10

12:55 pm - 5:10 pm

HOU

STL

4h 15m1 stop

7:55 pm - 10:10 pm

STL

HOU

2h 15mnonstop

$279Southwest

Tue, Feb 3 - Tue, Feb 10

6:36 pm - 10:59 pm

HOU

STL

4h 23m1 stop

5:04 pm - 10:46 pm

STL

HOU

5h 42m1 stop

$313American Airlines

Tue, Jan 27 - Thu, Jan 29

Frontier flights from Houston to St. Louis

Our best Frontier deals on Houston to St. Louis flight tickets

Frontier

Jan 7

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

$133

Find similar

Frontier

Jan 23

IAH6:05 pmHouston George Bush Intcntl

12h 46m

1 stop

STL6:51 amLambert-St Louis

Jan 25

STL5:42 pmLambert-St Louis

15h 18m

1 stop

IAH9:00 amHouston George Bush Intcntl

$144

Find similar

Frontier

Jan 15

IAH8:16 pmHouston George Bush Intcntl

11h 38m

1 stop

STL7:54 amLambert-St Louis

Feb 7

STL8:22 pmLambert-St Louis

20h 48m

1 stop

IAH5:10 pmHouston George Bush Intcntl

$146

Find similar

Delta flights from Houston to St. Louis

Our best Delta deals on Houston to St. Louis flight tickets

Delta

Feb 10

IAH5:30 amHouston George Bush Intcntl

6h 24m

1 stop

STL11:54 amLambert-St Louis

Feb 10

STL5:04 pmLambert-St Louis

6h 52m

1 stop

IAH11:56 pmHouston George Bush Intcntl

$293

Find similar

Delta

Feb 9

HOU5:04 pmHouston Hobby

6h 33m

1 stop

STL11:37 pmLambert-St Louis

Feb 14

STL5:01 pmLambert-St Louis

5h 27m

1 stop

HOU10:28 pmHouston Hobby

$333

Find similar

Delta

Feb 10

HOU5:45 amHouston Hobby

6h 09m

1 stop

STL11:54 amLambert-St Louis

Feb 10

STL5:04 pmLambert-St Louis

5h 29m

1 stop

HOU10:33 pmHouston Hobby

$336

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 2/3

12:16 pm-11:33 pm

1 stop11h 17m

Lambert-St Louis

Tue 2/10

3:49 pm-11:11 am

1 stop19h 22m

$132

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 1/7

8:13 pm-10:33 pm

1 stop26h 20m

Lambert-St Louis

Tue 1/13

5:11 pm-6:58 pm

1 stop25h 47m

$133

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 1/21

3:18 pm-11:33 pm

1 stop8h 15m

Lambert-St Louis

Sun 1/25

5:42 pm-9:00 am

1 stop15h 18m

$140

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 1/22

12:16 pm-11:33 pm

1 stop11h 17m

Lambert-St Louis

Sat 1/24

12:12 pm-7:24 pm

1 stop7h 12m

$141

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 1/23

6:05 pm-6:51 am

1 stop12h 46m

Lambert-St Louis

Sun 1/25

5:42 pm-9:00 am

1 stop15h 18m

$144

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 1/20

4:35 pm-6:51 am

2 stops14h 16m

Lambert-St Louis

Tue 1/27

5:42 pm-9:57 pm

1 stop28h 15m

$145

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 2/10

8:18 pm-10:27 pm

1 stop26h 09m

Lambert-St Louis

Thu 2/12

10:11 pm-9:17 pm

1 stop23h 06m

$147

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 2/3

2:35 pm-4:30 pm

Nonstop1h 55m

Lambert-St Louis

Tue 2/10

7:55 pm-10:10 pm

Nonstop2h 15m

$273

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 2/3

12:55 pm-5:10 pm

1 stop4h 15m

Lambert-St Louis

Tue 2/10

7:55 pm-10:10 pm

Nonstop2h 15m

$279

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 1/27

6:36 pm-10:59 pm

1 stop4h 23m

Lambert-St Louis

Thu 1/29

5:04 pm-10:46 pm

1 stop5h 42m

$313

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 April 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 $286. 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 $410. 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 $336 when looking at flights departing in the afternoon. At noon 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 $345 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 3 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 in St. Louis. From Houston there are direct flights to 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?
The number of operators available for flights from Houston to Lambert-St Louis Airport is 4 as of December 2025.
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
Frontier	PriceFrom $109	Free Cancellation	Rating 5.8 3,074 reviews	Search Frontier flights
United Airlines	PriceFrom $149	Free Cancellation	Rating 7.4 9,106 reviews	Search United Airlines flights
American Airlines	PriceFrom $180	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights
Southwest	PriceFrom $198	Free Cancellation	Rating 8.0 4,253 reviews	Search Southwest flights

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Maryland Heights

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Florissant

Fenton

St. Peters

Wentzville

Collinsville

Alton

Farmington

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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.