$52+ Cheap flights from St. Louis (STL) to Houston

One-way flight from Lambert-St Louis to Houston

Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).

Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).

Average for round-trip flights in July 2025

Find flight deals from St. Louis to Houston

Cheapest flights from St. Louis to Houston
Explore the most affordable flight options available from St. Louis to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Wed 7/307:29 pmSTL - IAH

1 stop28h 07mFrontier

Sat 8/96:00 amIAH - STL

1 stop7h 59mFrontier

Deal found 7/28

$205

Wed 8/135:40 pmSTL - IAH

1 stop17h 08mMultiple Airlines

Sun 8/176:10 amIAH - STL

1 stop7h 22mMultiple Airlines

Deal found 7/26

$206

Fri 8/292:30 pmSTL - IAH

3 stops21h 40mSpirit Airlines

Sun 8/316:10 amIAH - STL

1 stop7h 22mSpirit Airlines

Deal found 7/26

$207

Tue 8/197:45 amSTL - HOU

Nonstop2h 05mSouthwest

Wed 8/278:45 amHOU - STL

Nonstop2h 05mSouthwest

Deal found 7/28

$217

Tue 8/266:15 amSTL - IAH

Nonstop2h 11mUnited Airlines

Tue 9/24:50 pmIAH - STL

Nonstop2h 08mUnited Airlines

Deal found 7/26

$217

Tue 9/95:18 amSTL - HOU

1 stop4h 26mAmerican Airlines

Tue 9/162:33 pmHOU - STL

1 stop3h 49mAmerican Airlines

Deal found 7/26

$236

Wed 9/1010:20 amSTL - HOU

1 stop7h 19mDelta

Wed 9/1710:44 amHOU - STL

1 stop5h 21mDelta

Deal found 7/28

$237

Best flights from St. Louis to Houston
Discover carefully curated flight deals from St. Louis to Houston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Wed 8/135:40 pmSTL - IAH

1 stop17h 08mMultiple Airlines

Sun 8/176:10 amIAH - STL

1 stop7h 22mMultiple Airlines

Deal found 7/26

$206

Thu 8/142:30 pmSTL - IAH

1 stop5h 13mSpirit Airlines

Sun 8/176:10 amIAH - STL

1 stop7h 22mSpirit Airlines

Deal found 7/27

$207

Sat 8/92:52 pmSTL - IAH

1 stop8h 04mFrontier

Sun 8/1010:04 pmIAH - STL

1 stop11h 07mFrontier

Deal found 7/27

$208

Wed 8/277:45 amSTL - HOU

Nonstop2h 05mSouthwest

Tue 9/25:35 amHOU - STL

Nonstop2h 00mSouthwest

Deal found 7/27

$217

Tue 8/266:15 amSTL - IAH

Nonstop2h 11mUnited Airlines

Tue 9/24:50 pmIAH - STL

Nonstop2h 08mUnited Airlines

Deal found 7/26

$217

Tue 9/95:18 amSTL - HOU

1 stop4h 26mAmerican Airlines

Tue 9/162:33 pmHOU - STL

1 stop3h 49mAmerican Airlines

Deal found 7/26

$236

Fri 9/53:36 pmSTL - HOU

1 stop6h 55mDelta

Sat 9/1310:44 amHOU - STL

1 stop5h 21mDelta

Deal found 7/28

$316

Last-minute flights from St. Louis to Houston
Discover last-minute flight deals from St. Louis to Houston. Data last updated July 28, 2025 and is based on user searches.

Wed 7/307:29 pmSTL - IAH

1 stop28h 07mFrontier

Sat 8/96:00 amIAH - STL

1 stop7h 59mFrontier

Deal found 7/28

$205

Mon 8/47:00 amSTL - HOU

1 stop5h 11mDelta

Thu 8/141:05 pmHOU - STL

1 stop4h 49mDelta

Deal found 7/27

$582

Mon 8/47:38 pmSTL - HOU

1 stop4h 12mAmerican Airlines

Fri 8/82:30 pmHOU - STL

1 stop5h 52mAmerican Airlines

Deal found 7/28

$651

Tue 8/55:40 pmSTL - IAH

1 stop17h 08mFrontier

Sun 8/106:00 amIAH - STL

1 stop7h 34mFrontier

Deal found 7/28

$215

Wed 8/611:24 amSTL - IAH

1 stop8h 19mSpirit Airlines

Mon 8/118:48 pmIAH - STL

2 stops19h 43mSpirit Airlines

Deal found 7/27

$272

Wed 8/611:24 amSTL - IAH

1 stop8h 19mMultiple Airlines

Mon 8/118:30 pmIAH - STL

3 stops22h 11mMultiple Airlines

Deal found 7/27

$304

Wed 8/68:45 pmSTL - HOU

Nonstop2h 00mSouthwest

Mon 8/115:10 amHOU - STL

Nonstop2h 00mSouthwest

Deal found 7/27

$539

Wed 8/610:15 amSTL - IAH

Nonstop2h 11mUnited Airlines

Mon 8/114:40 pmIAH - STL

Nonstop2h 13mUnited Airlines

Deal found 7/27

$562

Tue 8/123:40 pmSTL - HOU

1 stop6h 51mDelta

Tue 8/191:05 pmHOU - STL

1 stop6h 02mDelta

Deal found 7/26

$340

Wed 8/135:40 pmSTL - IAH

1 stop17h 08mMultiple Airlines

Sun 8/176:10 amIAH - STL

1 stop7h 22mMultiple Airlines

Deal found 7/26

$206

Tue 8/197:45 amSTL - HOU

Nonstop2h 05mSouthwest

Wed 8/278:45 amHOU - STL

Nonstop2h 05mSouthwest

Deal found 7/28

$217

Tue 8/266:15 amSTL - IAH

Nonstop2h 11mUnited Airlines

Tue 9/24:50 pmIAH - STL

Nonstop2h 08mUnited Airlines

Deal found 7/26

$217

One-way flights from St. Louis to Houston
Search for one-way flight options from St. Louis to Houston. Find affordable one-way fares based on user searches. Data last updated July 28, 2025.

Thu 8/212:30 pmSTL - IAH

1 stop5h 13mSpirit Airlines

Deal found 7/28

$52

Thu 8/72:36 pmSTL - IAH

1 stop8h 20mFrontier

Deal found 7/27

$98

Wed 8/277:45 amSTL - HOU

Nonstop2h 05mSouthwest

Deal found 7/28

$109

Tue 9/26:15 amSTL - IAH

Nonstop2h 11mUnited Airlines

Deal found 7/28

$109

Sat 12/65:26 amSTL - HOU

1 stop6h 01mAmerican Airlines

Deal found 7/27

$118

Tue 12/911:57 amSTL - IAH

1 stop5h 10mAmerican Airlines

Deal found 7/27

$118

Sat 9/277:10 amSTL - HOU

1 stop5h 08mDelta

Deal found 7/28

$119

Tue 12/26:00 amSTL - IAH

1 stop5h 04mDelta

Deal found 7/28

$119

Sun 12/75:15 pmSTL - IAH

2 stops17h 05mMultiple Airlines

Deal found 7/27

$136

Thu 9/1112:05 pmSTL - HOU

2 stops21h 58mMultiple Airlines

Deal found 7/26

$170

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Tue 8/19

8:00 am-3:40 pm

1 stop7h 40m

Houston George Bush Intcntl

Wed 8/27

3:27 pm-9:11 am

1 stop17h 44m

$205

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Fri 8/29

2:30 pm-7:43 pm

1 stop5h 13m

Houston George Bush Intcntl

Mon 9/1

6:00 am-9:11 am

1 stop27h 11m

$209

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Tue 8/19

7:45 am-9:50 am

Nonstop2h 05m

Houston Hobby

Wed 8/27

8:45 am-10:50 am

Nonstop2h 05m

$217

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Sun 8/31

2:30 pm-7:43 pm

1 stop5h 13m

Houston George Bush Intcntl

Sat 9/6

6:00 am-10:50 am

3 stops28h 50m

$217

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Tue 9/9

5:18 am-9:44 am

1 stop4h 26m

Houston Hobby

Tue 9/16

2:33 pm-6:22 pm

1 stop3h 49m

$236

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Wed 9/10

10:20 am-5:39 pm

1 stop7h 19m

Houston Hobby

Wed 9/17

10:44 am-4:05 pm

1 stop5h 21m

$237

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Wed 8/27

6:15 am-8:26 am

Nonstop2h 11m

Houston George Bush Intcntl

Sat 8/30

4:50 pm-6:58 pm

Nonstop2h 08m

$287

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 8/21

2:30 pm-7:43 pm

1 stop5h 13m

$52

St. LouisHouston

STL - IAH

STLIAH

Lambert-St Louis

Thu 8/7

2:36 pm-10:56 pm

1 stop8h 20m

$98

St. LouisHouston

STL - HOU

STLHOU

Lambert-St Louis

Wed 8/27

7:45 am-9:50 am

Nonstop2h 05m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 17 results

The best insider tips for St. Louis to Houston flights

Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Houston trip

Airlines

Southwest

Southwest offers two free checked bags, including oversized items like skis.

Southwest's open seating policy allows passengers to choose any available seat.

Read more about Southwestby Marisa Garcia

United Airlines

Basic Economy allows a personal item only, no carry-on bags without extra fees.

Economy Plus offers extra legroom seats towards the front of the economy cabin.

Read more about United Airlinesby Harriet Baskas

Airports

STL

Security screening at STL typically takes 5 to 10 minutes during off-peak times. Check real-time wait times online before heading to the airport.

IAH

For a quick ride to downtown Houston from IAH, consider using Uber or Lyft, which pick up at Terminals A, B, and C.

HOU

HOU's arrival roadways are generally congestion-free. Consider using a map app with real-time traffic info for efficient navigation.

Our travel experts

Marisa Garcia

Expert on Southwest

Harriet Baskas

Expert on United Airlines

Evie Carrick

Expert on IAH

Taryn White

Expert on STL

Scott Laird

Expert on HOU

Best time to book a flight from St. Louis to Houston

Have a flexible travel schedule? Discover the best time to fly to Houston from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Houston

How far ahead should I book a flight from St. Louis to Houston?

To ensure you get the cheapest price possible for a flight from St. Louis to Houston, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Houston?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Houston (average of $230). Flying from St. Louis to Houston in March is currently the most expensive (average of $331). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to HOU?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Houston in the evening. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from St. Louis to Houston?

Travelers seeking maximum savings on their St. Louis to Houston flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to Houston

The most flights from STL to HO1 are scheduled on a Sunday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Houston

Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from St. Louis to Houston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

8.0

Very good

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta

8.0

Very good

7,975 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

8,892 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines

7.2

Good

10,000 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Spirit Airlines

6.3

Okay

8,040 reviews

8.0

Very good