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.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $197 (Expedia) |
One-way from | $60 (Trip.com) |
Popular in | December |
Cheapest in | September |
Average price | $377 |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Sun 2/1
9:09 am-8:23 pm
2 stops11h 14m
Houston George Bush Intcntl
Sun 2/8
6:05 pm-6:51 am
1 stop12h 46m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Thu 1/22
5:42 pm-10:33 am
2 stops16h 51m
Houston George Bush Intcntl
Sun 1/25
6:05 pm-6:51 am
1 stop12h 46m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Wed 2/11
5:04 pm-10:33 pm
1 stop5h 29m
Houston Hobby
Wed 2/18
5:19 pm-11:36 pm
1 stop6h 17m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Thu 1/29
6:00 am-8:20 am
Nonstop2h 20m
Houston Hobby
Tue 2/3
5:40 am-7:35 am
Nonstop1h 55m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Wed 1/28
9:59 am-4:10 pm
1 stop6h 11m
Houston Hobby
Wed 2/4
5:45 am-11:54 am
1 stop6h 09m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Wed 1/28
5:04 pm-10:33 pm
1 stop5h 29m
Houston Hobby
Tue 2/10
5:04 pm-11:37 pm
1 stop6h 33m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Tue 1/27
9:59 am-4:10 pm
1 stop6h 11m
Houston Hobby
Tue 2/10
5:04 pm-11:37 pm
1 stop6h 33m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Sat 1/31
4:42 pm-7:10 pm
Nonstop2h 28m
Houston George Bush Intcntl
Thu 2/5
7:55 pm-10:00 pm
Nonstop2h 05m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Thu 2/5
9:00 am-11:15 am
Nonstop2h 15m
Houston Hobby
Mon 2/9
6:35 pm-8:35 pm
Nonstop2h 00m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Wed 1/28
5:04 pm-10:33 pm
1 stop5h 29m
Houston Hobby
Thu 2/5
5:45 am-11:04 am
1 stop5h 19m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star |
To ensure you get the cheapest price possible for a flight from St. Louis to Houston, you should look to book at least 52 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.
Currently, October is the cheapest month in which you can book a flight from St. Louis to Houston (average of $115). Flying from St. Louis to Houston in July is currently the most expensive (average of $191). 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.
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 32% on your trip compared to booking a flight in the afternoon.
Travelers seeking maximum savings on their St. Louis to Houston flight should consider departing on Wednesday evenings 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.
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Mike,Aug 2025
OKC - AUS
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Mike,Aug 2025
OKC - AUS
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Mike,Aug 2025
OKC - AUS
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Mike,Aug 2025
OKC - AUS
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Mike,Aug 2025
OKC - AUS
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Mike,Aug 2025
OKC - AUS
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$127 | Average$231 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$128 | Average$223 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$387 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$388 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$361 | FlexibilityNo cancel fee | On-time63% |