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TSA Security Wait Times

Lambert St Louis Airport STL

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St Louis Lambert International Airport (STL) TSA Security Wait Times Information

STL Airport, with its two terminals, would be considered a "medium sized" airport relative to other airports in the United States. As this is the case, getting through security is pretty straight forward.  In addition to "standard" security clearance, the airport also features the optional TSA Pre and CLEAR services. More detail can be found below. 

Get CLEAR Expedited Security at St. Louis Airport! 

STL Airport features CLEAR expedited security screening. Joining CLEAR will save you time and stress in St. Louis Lambert security lines. See below for TSA/CLEAR hours for enrollment and screening. 

In partnership with iFly, CLEAR is offering a 2 month free promotion. **NEW**  You can add up to 3 other family members to the 2 month trial (siblings, parents, aunts/uncles, etc.). It only takes a minute to sign up! ***LIMITED TIME PROMOTION***

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Lambert St Louis Airport (STL) Terminals

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STL - Saint Louis, MO - Lambert St Louis Airport
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STL Flight Delays

Before you head to the airport, keep yourself informed of STL delays by checking STL Arrival Delays, STL Departure Delays, or use iFly's STL Flight Tracker. Having knowledge of STL airport delays will help with stress-free travel.

Security Checkpoints - Location and Hours

STL is a medium sized airport, so it has only 3 TSA checkpoints, 2 for Terminal 1 and one for Terminal 2.  Monday mornings tend to be the most crowded, especially for very early flight departures. So, if you have one of the first flights of the day, it is best to be there earlier so you can get through security. 

Terminal 1 

A Gates: 4:00 am – 8:30 pm (Air Canada, Delta, United and charter flights)

CLEAR Lane and Enrollment for Standard and PreCheck travelers: 4:00 am - 8:00 pm

C Gates: 3:45 am – 9:30 pm (Air Choice One, Alaska, American, Cape Air and Frontier)

CLEAR Lane and Enrollment for Standard and PreCheck travelers: 4:00 am - 8:00 pm

Terminal 2

E Gates: 3:30 am – 10 pm (Serving Southwest and international charter arrivals)

CLEAR Lane for PreCheck-eligible travelers: 4:00 am - 8:00 pm

CLEAR Lane and Enrollment for Standard security travelers: 4:00 am - 8:00 pm

TSA PreCheck 

Eligible participants use dedicated screening lanes for screening benefits which include leaving on shoes, light outerwear and belts, as well as leaving laptops and 3-1-1 compliant liquids in carry-on bags. Passengers should carefully check their Boarding Pass. The TSA randomly assigns passengers Pre-Check privileges.

STL TSA Pre✓™ enrollment center is located in Terminal 1 on the Ticketing Level (near the MetroLink and Entrance #2). Hours are Monday-Friday 8:30am - 11:30am and 12:00pm - 5:00pm. 

About STL Security Wait Times

Security wait times at St. Louis Airport are approximate and can vary based on several factors including severe weather, TSA staffing, airport construction, etc.

STL TSA wait time forecasts are made leveraging flight volume data and TSA staffing models. Using advanced data science, wait times for St. Louis Airport are projected, that barring extreme outliers, are within five minutes in accuracy, as validated by large US airlines. The TSA urges all travelers to arrive at the airport well in advance of scheduled flight departures and has provided security checkpoint wait time information as a guide to assist in travel planning. Please be sure to check with your airline for ticket counter wait times as well as possible changes to flight schedules, as these and other factors influence your decision regarding how early to arrive at STL. Please be aware that each airline has a recommended arrival time and even stricter required arrival times.

All airlines require that you arrive at the check-in counter, the flight's departure gate and even onboard and in your assigned seat a prescribed amount of time before the flight's scheduled departure time. The amount of the advance arrival time required varies depending on the airline you are using. Most airlines' conditions of carriage state that with many of their tickets, failure to arrive at the check-in counter, the flight's departure gate and your assigned seat a prescribed amount of time before the flight's scheduled departure time may cause you to be denied boarding and cause you to forfeit any refund or other compensation due for the unused ticket even if you have advance seat assignments and advance boarding passes.

TSA Pre Check at STL


Terminal E

Concourse E Checkpoint

Terminal EAST

Concourse E-East Checkpoint

Terminal MAIN

Concourse A Checkpoint
Concourse C Checkpoint