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Typical history

St. Louis Lambert International Airport TSA wait times

STL · KSTL · St Louis, Missouri

Security wait

A live wait is shown in this space when the stored feed is under 15 minutes old.

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The current hour is filled from the observed-hour table in this browser.

Observed security history for St. Louis Lambert International Airport (STL) is listed by hour. It is not a live reading. The current hour is chosen in the browser from that table.

Typical wait by hour

On Sundays, the quietest observed standard-lane hours are 10pm (sample-weighted median 2 minutes) and 11pm (sample-weighted median 2 minutes). The busiest observed hours are 8am (sample-weighted 75th percentile 18 minutes) and 9am (sample-weighted 75th percentile 18 minutes). Hours with no readings are left out, not treated as zero.

Standard lane only. Average and 75th percentile are sample-weighted from observed history. A gap means that hour had no readings.

PreCheck

This airport's historical feed has no PreCheck lane readings.

CLEAR

CLEAR is not shown. We are not using a CLEAR source.

Departure delays

Historical on-time performance. Not a live delay.

75%

On-time departures, September 2025 through August 2026. A departure is on time when it left less than 15 minutes late.

Flights out of St. Louis Lambert International Airport left on time 75% of the time from September 2025 through August 2026. The largest share of delay minutes was late-arriving aircraft (45%). That is a share of delay minutes, not a share of flights. The average delay among departures that were 15 minutes or more late was 65 minutes. 1% of scheduled flights were cancelled.

The highest on-time month was September 2025 (83%). The lowest was July 2026 (67%).

Share of delay minutes by cause. Not a percent of flights.
CauseDelay minutesShare of delay minutes
late-arriving aircraft432,06945%
the airline291,79030%
the national airspace system193,66520%
weather43,8565%
security2,1640%

Customs and passport control

International arrivals. Not TSA security.

The current hour is filled from the customs table in this browser. It is not a TSA security wait.

Sunday
HourAveragePublished maximumPassengers
12pm9 min17 min64
1pm18 min44 min1,875
2pm16 min35 min1,525
5pm6 min14 min808
6pm6 min14 min542
7pm12 min28 min1,506
8pm8 min22 min468
Monday
HourAveragePublished maximumPassengers
1pm24 min53 min1,862
2pm25 min41 min864
3pm16 min36 min775
4pm8 min16 min547
5pm6 min14 min529
Tuesday
HourAveragePublished maximumPassengers
1pm14 min34 min2,071
2pm22 min42 min257
3pm4 min9 min139
4pm7 min16 min656
6pm9 min20 min194
7pm8 min20 min1,356
8pm8 min20 min185
Wednesday
HourAveragePublished maximumPassengers
1pm16 min36 min1,982
2pm14 min28 min491
4pm6 min14 min275
5pm3 min11 min81
7pm9 min20 min1,383
8pm11 min25 min391
Thursday
HourAveragePublished maximumPassengers
1pm7 min14 min203
2pm9 min17 min180
3pm5 min12 min637
4pm4 min8 min92
5pm5 min11 min325
6pm8 min16 min128
Friday
HourAveragePublished maximumPassengers
1pm22 min51 min2,172
2pm25 min42 min1,171
3pm8 min17 min570
4pm6 min13 min380
5pm5 min13 min376
6pm7 min16 min120
7pm13 min30 min1,848
8pm14 min31 min198
Saturday
HourAveragePublished maximumPassengers
1pm7 min16 min736
2pm7 min15 min1,402
3pm5 min10 min455

When to be at the airport

TSA's published guidance is to arrive at the airport 2 hours before a domestic departure and 3 hours before an international departure. That is guidance, not a measured security wait.

Your flight

Enter a departure time to calculate when to be at the airport.

This subtracts TSA's published arrival guidance from the time you enter. It is not a drive time, and it is not a predicted security wait.

Nearby airports

Distances are straight-line miles.

Airport details
Runways
4
Longest runway
12R/30L, 11,020 ft
Longest runway width
150 ft
Longest runway surface
CONC
Longest runway lighting
HIGH
Elevation
617.3 ft
Control tower
Yes
CY2024 enplanements
7,807,362
Facility use
Public
Ownership
Public
Part 139 certificate code
I D
Fuel
100LL,A
Airframe repair
MAJOR
Powerplant repair
MAJOR
Last inspection
2026/08/06

FAA facility record date 2026/10/01. Runways: BTS NTAD Runways. Facility facts: BTS NTAD Aviation Facilities. Enplanements: FAA CY2024 commercial service.

Questions

What is the TSA wait at STL right now?

Observed security history for St. Louis Lambert International Airport (STL) is listed by hour. It is not a live reading. The current hour is chosen in the browser from that table.

Does TSACheck have a live security wait for STL?

A live figure is shown only when the stored airport feed is fresh. St. Louis Lambert International Airport (STL) also has observed history. A stored value that is too old is not shown as live.

How often do flights leave STL on time?

Flights out of St. Louis Lambert International Airport left on time 75% of the time from September 2025 through August 2026. The largest share of delay minutes was late-arriving aircraft (45%). That is a share of delay minutes, not a share of flights. The average delay among departures that were 15 minutes or more late was 65 minutes. 1% of scheduled flights were cancelled.

What is the customs wait at STL?

Customs and passport-control history is in its own section. It is not a TSA security wait. The current hour is chosen from that table in the browser.

How early should I get to STL?

TSA's published guidance is to arrive at the airport 2 hours before a domestic departure and 3 hours before an international departure. That is guidance, not a measured security wait.

Which airports are near STL?

The nearest airports in this list are Scott AFB/Midamerica Airport (BLV), 32 straight-line miles; Abraham Lincoln Capital Airport (SPI), 84 straight-line miles; Quincy Regional Airport Baldwin Field (UIN), 94 straight-line miles; Columbia Regional Airport (COU), 100 straight-line miles; Veterans Airport of Southern Illinois (MWA), 101 straight-line miles.