You both notice the ominous "SSSS" on your boarding pass, a hiccup in your travel journey. But what happens next? What do those four letters mean, and how did they get on your boarding pass?

SSSS can happen on any flight to, from, or within the United States, including inbound international flights. If you spot those four letters on your boarding pass, you may be taken aside by a ...

For fliers who haven’t encountered it before, SSSS on a boarding pass stands for Secondary Security Screening Selection. It’s the Transportation Security Administration’s method of selecting ...

According to Metro, receiving an ‘SSSS’ boarding pass often prevents you from accessing the pass from your phone, which means that you need to print it from a kiosk at the airport or get it ...

Passengers with the ‘SSSS’ stamp go through an intensive ... Seeing the dreaded four letters on your boarding pass might mean a delay on your journey, as such special security checks ...