STL TSA Wait Times — Lambert
St. Louis Lambert International Airport, St Louis. Live security wait times, updated every 10 minutes.
GateWaitTimes independently measures security waits at STL, taking a reading every ten minutes around the clock. We have recorded 10,734 readings here since August 25, 2026, drawn from official TSA, airport, and FAA feeds.
Learn more about our data credibility & sources →STL TSA Wait Times by Hour
This chart shows the average security wait at STL for every hour of the day, so a taller bar means the line is usually longer at that time. The numbers come from our own readings, which we take every ten minutes around the clock.
The current wait time at STL is 0 minutes, which is quieter than usual for a Wednesday, when the line usually runs around 10 minutes.
When Should You Leave?
Tap to pick your flight’s departure time
TSA PreCheck at Lambert
PreCheck lane open right now
The TSA PreCheck lane at Lambert is usually the fastest way through security. Travelers keep shoes, belts, and light jackets on and leave laptops and liquids packed, so the lane keeps moving even when the standard line backs up. At an airport this size, most major checkpoints run a PreCheck lane for much of the day, though hours still vary by checkpoint.
The status above comes from the same feed as the wait time on this page. GateWaitTimes polls it every 10 minutes, around the clock. If the lane shows closed, standard screening is still open; recheck shortly before you leave in case staffing changes.
How Early Should You Arrive at STL?
These are general guidelines for St. Louis Lambert International Airport. Use the calculator above for a departure time tuned to the current wait, your drive, and whether you have PreCheck. Add time on peak travel mornings, around holidays, and if you're checking a bag.
Frequently Asked Questions
How long is the security line at Lambert (STL) right now?
As of the latest measurement, the standard security wait at STL is about 0 minutes. GateWaitTimes re-measures every 10 minutes, so check the live figure at the top of this page.
How early should I arrive at St. Louis Lambert International Airport?
For a large airport, arrive about 2 hours before a domestic flight and 3 hours before an international flight. Add time during holiday peaks and early-morning banks.
Does STL have TSA PreCheck?
Most US airports of this size offer TSA PreCheck lanes at their main checkpoints, though lane hours vary by checkpoint and time of day. Check the checkpoint status on this page for which lanes are reporting, and the TSA site for official PreCheck lane hours.
How often is this wait-time data updated?
GateWaitTimes polls TSA wait-time feeds, FAA airport status, and National Weather Service forecasts every 10 minutes, around the clock, and records every reading.
Is TSA PreCheck open at STL right now?
Yes — as of the latest reading, a TSA PreCheck lane is open at STL. GateWaitTimes re-checks every 10 minutes.
About Security at St. Louis Lambert International Airport
St. Louis Lambert International Airport (STL) serves St Louis, MO. It is a large airport with steady passenger volume through most of the day, so the standard lane rarely empties out completely, which shapes how the security line at Lambert behaves: expect the longest waits when several departures cluster in the same hour, and much shorter ones in between.
TSA PreCheck status at STL is tracked live. The PreCheck section above shows whether a lane is open right now. PreCheck lanes usually move faster than standard screening, but they are not staffed at every hour, so check before counting on one.
The number above is a live reading for the standard lane, refreshed every few minutes. Security wait times can change quickly at STL, so recheck this page shortly before you leave for the airport.
Fun Facts About St. Louis Lambert International Airport
- In the late 1920s Lambert pioneered US air traffic control, with a controller waving colored flags at pilots.
- That first controller, Archie League, worked from a wheelbarrow topped with a beach umbrella and signal flags.
- Charles Lindbergh flew airmail from the field before his famous 1927 transatlantic 'Spirit of St. Louis' flight.
- A rare EF4 tornado tore through the main terminal in April 2011, shattering glass but causing no deaths.