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 | $150 (Mytrip) |
One-way from | $50 (Trip.com) |
Popular in | November |
Cheapest in | September |
Average price | $394 |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Sat 1/17
7:43 pm-5:21 pm
2 stops21h 38m
Houston George Bush Intcntl
Sun 1/25
10:51 am-12:50 pm
1 stop25h 59m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Thu 12/4
12:04 pm-10:50 pm
1 stop10h 46m
Houston George Bush Intcntl
Wed 12/10
9:00 am-10:33 pm
2 stops13h 33m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Sat 12/20
4:27 pm-7:04 pm
1 stop26h 37m
Houston George Bush Intcntl
Sat 12/27
9:30 am-9:40 am
2 stops24h 10m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Wed 12/10
9:10 am-11:20 am
Nonstop2h 10m
Houston Hobby
Wed 12/17
7:00 pm-9:00 pm
Nonstop2h 00m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Tue 2/10
9:59 am-5:42 pm
1 stop7h 43m
Houston George Bush Intcntl
Tue 2/24
6:31 pm-11:38 pm
1 stop5h 07m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Wed 12/17
11:10 am-1:35 pm
Nonstop2h 25m
Houston George Bush Intcntl
Sat 1/10
7:55 pm-10:00 pm
Nonstop2h 05m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Thu 12/4
9:20 am-11:30 am
Nonstop2h 10m
Houston Hobby
Wed 12/10
3:25 pm-5:25 pm
Nonstop2h 00m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Tue 2/3
10:15 am-3:15 pm
2 stops5h 00m
Houston Hobby
Tue 2/17
1:05 pm-5:55 pm
1 stop4h 50m
St. LouisHouston
STL - HOU
STLHOU
Lambert-St Louis
Mon 12/15
9:15 am-11:25 am
Nonstop2h 10m
Houston Hobby
Wed 12/17
11:05 am-4:20 pm
2 stops5h 15m
St. LouisHouston
STL - IAH
STLIAH
Lambert-St Louis
Mon 12/15
6:15 am-8:34 am
Nonstop2h 19m
Houston George Bush Intcntl
Thu 12/18
7:50 pm-9:55 pm
Nonstop2h 05m
| 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 51 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 31% 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. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Boarding
Comfort
Food
Overall
Entertainment
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Boarding
Comfort
Food
Overall
Entertainment
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Boarding
Comfort
Food
Overall
Entertainment
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Boarding
Comfort
Food
Overall
Entertainment
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Boarding
Comfort
Food
Overall
Entertainment
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Boarding
Comfort
Food
Overall
Entertainment
Crew
Reviews
Mike,Aug 2025
OKC - AUS
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$212 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$127 | Average$270 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$162 | Average$393 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$403 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$371 | FlexibilityNo cancel fee | On-time63% |