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

The number of flights available between Houston and St. Louis is 14 per day as of January 2026. The most frequent departure time is 2:00PM, with 38% of daily flights leaving in the evening.

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

The number of flights available between Houston and St. Louis is 99 per week as of January 2026. The most frequent departure day is Tue, with 17% of weekly flights leaving on this day.

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

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

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.

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 January 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.

$62 Cheap Flights from Houston to St. Louis in 2026

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Find the cheapest flights from Houston to St. Louis

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:40 pm - 11:59 pm

IAH

STL

26h 19m1 stop

3:49 pm - 7:04 pm

STL

IAH

27h 15m1 stop

$132Multiple Airlines

Wed, Feb 25 - Mon, Mar 2

8:45 am - 11:33 pm

IAH

STL

14h 48m1 stop

3:49 pm - 7:04 pm

STL

IAH

27h 15m1 stop

$140Frontier

Tue, Feb 3 - Tue, Feb 10

6:45 am - 12:50 pm

IAH

STL

6h 05m1 stop

3:46 pm - 11:39 pm

STL

IAH

7h 53m1 stop

$144Frontier

Mon, Jan 26 - Wed, Jan 28

8:18 pm - 10:23 am

IAH

STL

14h 05m1 stop

5:42 pm - 11:11 am

STL

IAH

17h 29m1 stop

$147Multiple Airlines

Thu, Jan 29 - Mon, Feb 2

2:30 pm - 8:20 pm

HOU

STL

5h 50m1 stop

12:55 pm - 3:10 pm

STL

HOU

2h 15mnonstop

$261Southwest

Mon, Feb 23 - Wed, Feb 25

4:20 pm - 11:35 pm

HOU

STL

7h 15m2 stops

12:55 pm - 3:10 pm

STL

HOU

2h 15mnonstop

$262Southwest

Mon, Feb 23 - Wed, Feb 25

5:45 am - 11:54 am

HOU

STL

6h 09m1 stop

5:04 pm - 10:33 pm

STL

HOU

5h 29m1 stop

$269Delta

Tue, Feb 3 - Tue, Feb 10

5:22 pm - 11:58 pm

HOU

STL

6h 36m1 stop

6:04 am - 1:28 pm

STL

HOU

7h 24m1 stop

$270Delta

Mon, Mar 9 - Wed, Mar 11

10:35 am - 2:47 pm

HOU

STL

4h 12m1 stop

7:15 am - 12:09 pm

STL

HOU

4h 54m1 stop

$271American Airlines

Thu, Jan 29 - Mon, Feb 2

12:47 pm - 7:29 pm

HOU

STL

6h 42m1 stop

7:15 am - 12:09 pm

STL

HOU

4h 54m1 stop

$301American 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 23

IAH8:02 pmHouston George Bush Intcntl

18h 44m

1 stop

STL2:46 pmLambert-St Louis

Jan 30

STL5:42 pmLambert-St Louis

15h 18m

1 stop

IAH9:00 amHouston George Bush Intcntl

$133

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Frontier

Feb 3

IAH8:45 amHouston George Bush Intcntl

14h 48m

1 stop

STL11:33 pmLambert-St Louis

Feb 10

STL3:49 pmLambert-St Louis

27h 15m

1 stop

IAH7:04 pmHouston George Bush Intcntl

$140

Find similar

Frontier

Jan 26

IAH6:45 amHouston George Bush Intcntl

6h 05m

1 stop

STL12:50 pmLambert-St Louis

Jan 28

STL3:46 pmLambert-St Louis

7h 53m

1 stop

IAH11:39 pmHouston George Bush Intcntl

$144

Find similar

Southwest flights from Houston to St. Louis

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

Southwest

Feb 23

HOU2:30 pmHouston Hobby

5h 50m

1 stop

STL8:20 pmLambert-St Louis

Feb 25

STL12:55 pmLambert-St Louis

2h 15m

HOU3:10 pmHouston Hobby

$261

Find similar

Southwest

Feb 23

HOU4:20 pmHouston Hobby

7h 15m

2 stops

STL11:35 pmLambert-St Louis

Feb 25

STL12:55 pmLambert-St Louis

2h 15m

HOU3:10 pmHouston Hobby

$262

Find similar

Southwest

Feb 23

HOU4:20 pmHouston Hobby

7h 15m

2 stops

STL11:35 pmLambert-St Louis

Feb 25

STL10:25 amLambert-St Louis

4h 05m

1 stop

HOU2:30 pmHouston Hobby

$272

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Wed 2/25

9:40 pm-11:59 pm

1 stop26h 19m

Lambert-St Louis

Mon 3/2

3:49 pm-7:04 pm

1 stop27h 15m

$132

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Tue 2/3

8:45 am-11:33 pm

1 stop14h 48m

Lambert-St Louis

Tue 2/10

3:49 pm-7:04 pm

1 stop27h 15m

$140

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Mon 1/26

6:45 am-12:50 pm

1 stop6h 05m

Lambert-St Louis

Wed 1/28

3:46 pm-11:39 pm

1 stop7h 53m

$144

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

Thu 1/29

8:18 pm-10:23 am

1 stop14h 05m

Lambert-St Louis

Mon 2/2

5:42 pm-11:11 am

1 stop17h 29m

$147

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 2/23

2:30 pm-8:20 pm

1 stop5h 50m

Lambert-St Louis

Wed 2/25

12:55 pm-3:10 pm

Nonstop2h 15m

$261

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 2/23

4:20 pm-11:35 pm

2 stops7h 15m

Lambert-St Louis

Wed 2/25

12:55 pm-3:10 pm

Nonstop2h 15m

$262

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 2/3

5:45 am-11:54 am

1 stop6h 09m

Lambert-St Louis

Tue 2/10

5:04 pm-10:33 pm

1 stop5h 29m

$269

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Mon 3/9

5:22 pm-11:58 pm

1 stop6h 36m

Lambert-St Louis

Wed 3/11

6:04 am-1:28 pm

1 stop7h 24m

$270

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Thu 1/29

10:35 am-2:47 pm

1 stop4h 12m

Lambert-St Louis

Mon 2/2

7:15 am-12:09 pm

1 stop4h 54m

$271

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

Tue 1/27

12:47 pm-7:29 pm

1 stop6h 42m

Lambert-St Louis

Thu 1/29

7:15 am-12:09 pm

1 stop4h 54m

$301

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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 $256.

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 $288. 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 $335 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 $369 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 $341 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 $263 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).

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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 January 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 3,064 reviews	Search Frontier flights
United Airlines	PriceFrom $149	Free Cancellation	Rating 7.4 9,134 reviews	Search United Airlines flights
American Airlines	PriceFrom $180	Free Cancellation	Rating 7.2 11,083 reviews	Search American Airlines flights
Southwest	PriceFrom $198	Free Cancellation	Rating 8.0 4,247 reviews	Search Southwest flights

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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.