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

The number of flights available between Houston and St. Louis is 16 per day as of January 2026. The most frequent departure time is 7:00PM, with 42% 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 113 per week as of January 2026. The most frequent departure day is Mon, with 19% 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?

United Airlines, Southwest and Frontier are the top three most popular airlines that fly to St. Louis from Houston according to our data. United Airlines 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.

$58 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.

6:00 am - 6:51 am

IAH

STL

24h 51m

1 stop

3:49 pm - 7:04 pm

STL

IAH

27h 15m

1 stop

$131Multiple Airlines

mar., feb. 17 - mar., feb. 24

8:18 pm - 11:11 am

IAH

STL

14h 53m

1 stop

8:22 pm - 5:12 pm

STL

IAH

20h 50m

1 stop

$132Frontier

vie., feb. 6 - lun., feb. 9

8:18 pm - 8:24 am

IAH

STL

12h 06m

1 stop

5:42 pm - 9:57 pm

STL

IAH

28h 15m

1 stop

$133Frontier

sáb., ene. 31 - lun., feb. 2

8:18 pm - 10:27 pm

IAH

STL

26h 09m

1 stop

3:49 pm - 7:04 pm

STL

IAH

27h 15m

1 stop

$134Frontier

mar., feb. 17 - mar., feb. 24

6:45 am - 3:53 pm

IAH

STL

9h 08m

1 stop

8:17 pm - 8:28 am

STL

IAH

12h 11m

1 stop

$136Frontier

mié., feb. 25 - sáb., feb. 28

6:15 am - 6:51 am

IAH

STL

24h 36m

1 stop

3:49 pm - 7:00 am

STL

IAH

15h 11m

1 stop

$137Frontier

vie., feb. 20 - dom., feb. 22

1:05 pm - 6:51 am

IAH

STL

17h 46m

1 stop

8:22 pm - 5:12 pm

STL

IAH

20h 50m

1 stop

$138Multiple Airlines

vie., feb. 27 - lun., mar. 2

5:40 am - 7:35 am

HOU

STL

1h 55mnonstop

12:55 pm - 3:10 pm

STL

HOU

2h 15mnonstop

$277Southwest

mié., feb. 18 - mié., feb. 25

12:55 pm - 5:10 pm

HOU

STL

4h 15m

1 stop

6:00 am - 8:20 am

STL

HOU

2h 20mnonstop

$283Southwest

mié., feb. 18 - mié., feb. 25

5:19 pm - 11:36 pm

HOU

STL

6h 17m

1 stop

5:01 pm - 10:28 pm

STL

HOU

5h 27m

1 stop

$317Delta

mié., feb. 18 - sáb., feb. 21

Southwest flights from Houston to St. Louis

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

Southwest

Feb 18

HOU5:40 amHouston Hobby

1h 55m

STL7:35 amLambert-St Louis

Feb 25

STL12:55 pmLambert-St Louis

2h 15m

HOU3:10 pmHouston Hobby

$277

Southwest

Feb 18

HOU12:55 pmHouston Hobby

4h 15m

1 stop

STL5:10 pmLambert-St Louis

Feb 25

STL6:00 amLambert-St Louis

2h 20m

HOU8:20 amHouston Hobby

$283

Southwest

Feb 17

HOU7:15 amHouston Hobby

6h 20m

1 stop

STL1:35 pmLambert-St Louis

Feb 24

STL7:55 pmLambert-St Louis

2h 15m

HOU10:10 pmHouston Hobby

$287

Frontier flights from Houston to St. Louis

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

Frontier

Jan 29

IAH8:18 pmHouston George Bush Intcntl

14h 05m

1 stop

STL10:23 amLambert-St Louis

Jan 30

STL5:42 pmLambert-St Louis

15h 18m

1 stop

IAH9:00 amHouston George Bush Intcntl

$131

Frontier

Feb 6

IAH8:18 pmHouston George Bush Intcntl

14h 53m

1 stop

STL11:11 amLambert-St Louis

Feb 9

STL8:22 pmLambert-St Louis

20h 50m

1 stop

IAH5:12 pmHouston George Bush Intcntl

$132

Frontier

Jan 31

IAH8:18 pmHouston George Bush Intcntl

12h 06m

1 stop

STL8:24 amLambert-St Louis

Feb 2

STL5:42 pmLambert-St Louis

28h 15m

1 stop

IAH9:57 pmHouston George Bush Intcntl

$133

Fly from

Fly to

Route

Depart

Return

Price

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mar. 2/17

6:00 am-6:51 am

1 stop24h 51m

Lambert-St Louis

mar. 2/24

3:49 pm-7:04 pm

1 stop27h 15m

$131

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

vie. 2/6

8:18 pm-11:11 am

1 stop14h 53m

Lambert-St Louis

lun. 2/9

8:22 pm-5:12 pm

1 stop20h 50m

$132

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

sáb. 1/31

8:18 pm-8:24 am

1 stop12h 06m

Lambert-St Louis

lun. 2/2

5:42 pm-9:57 pm

1 stop28h 15m

$133

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mar. 2/17

8:18 pm-10:27 pm

1 stop26h 09m

Lambert-St Louis

mar. 2/24

3:49 pm-7:04 pm

1 stop27h 15m

$134

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

mié. 2/25

6:45 am-3:53 pm

1 stop9h 08m

Lambert-St Louis

sáb. 2/28

8:17 pm-8:28 am

1 stop12h 11m

$136

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

vie. 2/20

6:15 am-6:51 am

1 stop24h 36m

Lambert-St Louis

dom. 2/22

3:49 pm-7:00 am

1 stop15h 11m

$137

HoustonSt. Louis

IAH - STL

IAHSTL

Houston George Bush Intcntl

vie. 2/27

1:05 pm-6:51 am

1 stop17h 46m

Lambert-St Louis

lun. 3/2

8:22 pm-5:12 pm

1 stop20h 50m

$138

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

mié. 2/18

5:40 am-7:35 am

Nonstop1h 55m

Lambert-St Louis

mié. 2/25

12:55 pm-3:10 pm

Nonstop2h 15m

$277

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

mié. 2/18

12:55 pm-5:10 pm

1 stop4h 15m

Lambert-St Louis

mié. 2/25

6:00 am-8:20 am

Nonstop2h 20m

$283

HoustonSt. Louis

HOU - STL

HOUSTL

Houston Hobby

mié. 2/18

5:19 pm-11:36 pm

1 stop6h 17m

Lambert-St Louis

sáb. 2/21

5:01 pm-10:28 pm

1 stop5h 27m

$317

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 $261.

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. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $365 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 $266 on momondo.

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

There are 2 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 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 3,056 reviews	Search Frontier flights
United Airlines	PriceFrom $149	Free Cancellation	Rating 7.4 9,190 reviews	Search United Airlines flights
American Airlines	PriceFrom $180	Free Cancellation	Rating 7.2 11,172 reviews	Search American Airlines flights
Southwest	PriceFrom $198	Free Cancellation	Rating 8.0 4,266 reviews	Search Southwest flights

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O'Fallon

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Eureka

Edwardsville

Festus

Glencoe

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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.