Air travel is convenient but often stressful, with check-ins, luggage, and long security lines. For some passengers, that stress increases when four letters—SSSS—appear on their boarding pass. This stands for Secondary Security Screening Selection, signaling that the traveler must undergo enhanced TSA screening.
SSSS is part of the U.S. Secure Flight program, which pre-screens passengers using personal details like name, date of birth, and gender. Its goal is to identify potential security risks while allowing trusted travelers smoother passage. Most passengers flagged with SSSS aren’t in trouble; some are selected randomly to maintain security unpredictability.
Passengers with SSSS cannot check in online and must see an airline agent. At the checkpoint, their carry-ons are thoroughly inspected, electronics may be tested, and personal screening includes detailed pat-downs and explosive trace detection. This process can add 15–45 minutes to travel time.
The best approach is patience, cooperation, and preparation: have IDs and documents ready, remove electronics efficiently, and allow extra time for the delay.
Ultimately, SSSS isn’t a sign of wrongdoing—it’s a precautionary step in layered aviation security, designed to keep flights safer for everyone, even if it’s inconvenient for those selected.