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 40% 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.

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 day?

The number of flights available between Houston and St. Louis is 13 per day as of February 2026. The most frequent departure time is 1:00PM, with 42% of daily flights leaving in the afternoon.

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

The number of flights available between Houston and St. Louis is 93 per week as of February 2026. The most frequent departure day is Mon, with 18% 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 February 2026.

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.

$64 Cheap Flights from Houston to St. Louis in 2026

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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.

1:05 pm - 6:51 am

IAH

STL

17h 46m

1 stop

3:49 pm - 7:00 am

STL

IAH

15h 11m

1 stop

$251Multiple Airlines

Thu, Feb 19 - Sun, Feb 22

6:03 pm - 6:50 am

IAH

STL

12h 47m

2 stops

11:21 am - 10:50 pm

STL

IAH

11h 29m

1 stop

$253Multiple Airlines

Fri, Apr 17 - Thu, Apr 23

5:49 pm - 6:50 am

IAH

STL

13h 01m

1 stop

11:21 am - 11:51 pm

STL

IAH

12h 30m

2 stops

$257Multiple Airlines

Fri, May 1 - Sun, May 3

9:20 pm - 12:30 pm

IAH

STL

15h 10m

1 stop

8:12 pm - 12:39 am

STL

IAH

28h 27m

1 stop

$258Frontier

Sat, Mar 14 - Mon, Mar 16

1:05 pm - 9:49 am

IAH

STL

20h 44m

2 stops

10:47 pm - 9:56 am

STL

IAH

11h 09m

1 stop

$260Multiple Airlines

Fri, Mar 6 - Sun, Mar 8

6:39 am - 1:09 pm

IAH

STL

6h 30m

1 stop

1:09 pm - 10:58 pm

STL

IAH

9h 49m

1 stop

$264Frontier

Fri, Feb 27 - Fri, Mar 6

6:03 pm - 6:50 am

IAH

STL

12h 47m

2 stops

11:21 am - 5:03 pm

STL

IAH

5h 42m

1 stop

$266Multiple Airlines

Fri, Apr 17 - Sun, Apr 19

7:35 am - 9:35 am

HOU

STL

2h 00mnonstop

8:35 am - 10:45 am

STL

HOU

2h 10mnonstop

$277Southwest

Tue, May 5 - Wed, May 6

8:55 am - 12:50 pm

HOU

STL

3h 55m

1 stop

8:35 am - 10:45 am

STL

HOU

2h 10mnonstop

$283Southwest

Tue, May 5 - Wed, May 6

10:14 am - 5:13 pm

HOU

STL

6h 59m

1 stop

4:13 pm - 11:58 pm

STL

HOU

7h 45m

1 stop

$343American Airlines

Thu, Mar 26 - Sat, Mar 28

Delta flights from Houston to St. Louis

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

Delta

Mar 25

HOU11:33 amHouston Hobby

6h 20m

1 stop

STL5:53 pmLambert-St Louis

Mar 31

STL6:00 amLambert-St Louis

7h 28m

1 stop

HOU1:28 pmHouston Hobby

$365

Delta

Jun 25

HOU6:00 amHouston Hobby

6h 54m

1 stop

STL12:54 pmLambert-St Louis

Jul 1

STL7:20 amLambert-St Louis

4h 50m

1 stop

HOU12:10 pmHouston Hobby

$390

Delta

Jun 30

IAH7:15 amHouston George Bush Intcntl

7h 22m

1 stop

STL2:37 pmLambert-St Louis

Jul 1

STL5:30 pmLambert-St Louis

6h 27m

1 stop

IAH11:57 pmHouston George Bush Intcntl

$392

Frontier flights from Houston to St. Louis

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

Frontier

Feb 9

IAH8:18 pmHouston George Bush Intcntl

26h 09m

1 stop

STL10:27 pmLambert-St Louis

Feb 11

STL3:49 pmLambert-St Louis

16h 06m

1 stop

IAH7:55 amHouston George Bush Intcntl

$251

Frontier

Mar 14

IAH9:20 pmHouston George Bush Intcntl

15h 10m

1 stop

STL12:30 pmLambert-St Louis

Mar 16

STL8:12 pmLambert-St Louis

28h 27m

1 stop

IAH12:39 amHouston George Bush Intcntl

$258

Frontier

Feb 9

IAH6:05 amHouston George Bush Intcntl

17h 28m

2 stops

STL11:33 pmLambert-St Louis

Feb 11

STL8:17 pmLambert-St Louis

20h 55m

1 stop

IAH5:12 pmHouston George Bush Intcntl

$261

Fly from

Fly to

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 2/19

1:05 pm-6:51 am

1 stop17h 46m

Lambert-St Louis

Sun 2/22

3:49 pm-7:00 am

1 stop15h 11m

$251

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 4/17

6:03 pm-6:50 am

2 stops12h 47m

Lambert-St Louis

Thu 4/23

11:21 am-10:50 pm

1 stop11h 29m

$253

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 5/1

5:49 pm-6:50 am

1 stop13h 01m

Lambert-St Louis

Sun 5/3

11:21 am-11:51 pm

2 stops12h 30m

$257

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Sat 3/14

9:20 pm-12:30 pm

1 stop15h 10m

Lambert-St Louis

Mon 3/16

8:12 pm-12:39 am

1 stop28h 27m

$258

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 3/6

1:05 pm-9:49 am

2 stops20h 44m

Lambert-St Louis

Sun 3/8

10:47 pm-9:56 am

1 stop11h 09m

$260

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 2/27

6:39 am-1:09 pm

1 stop6h 30m

Lambert-St Louis

Fri 3/6

1:09 pm-10:58 pm

1 stop9h 49m

$264

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Fri 4/17

6:03 pm-6:50 am

2 stops12h 47m

Lambert-St Louis

Sun 4/19

11:21 am-5:03 pm

1 stop5h 42m

$266

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 5/5

7:35 am-9:35 am

Nonstop2h 00m

Lambert-St Louis

Wed 5/6

8:35 am-10:45 am

Nonstop2h 10m

$277

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 5/5

8:55 am-12:50 pm

1 stop3h 55m

Lambert-St Louis

Wed 5/6

8:35 am-10:45 am

Nonstop2h 10m

$283

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 3/26

10:14 am-5:13 pm

1 stop6h 59m

Lambert-St Louis

Sat 3/28

4:13 pm-11:58 pm

1 stop7h 45m

$343

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 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 $289. 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 $406. 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 $339 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 $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 $266 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 February 2026.
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 $128	Free Cancellation	Rating 5.7 3,051 reviews	Search Frontier flights
United Airlines	PriceFrom $149	Free Cancellation	Rating 7.4 9,236 reviews	Search United Airlines flights
American Airlines	PriceFrom $180	Free Cancellation	Rating 7.2 11,218 reviews	Search American Airlines flights
Southwest	PriceFrom $198	Free Cancellation	Rating 8.0 4,272 reviews	Search Southwest flights

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Maryland Heights

Florissant

O'Fallon

Collinsville

St. Peters

Fenton

Wentzville

Alton

Farmington

Clayton

Edwardsville

Eureka

Festus

Litchfield

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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.