Why Some Boarding Passes Say “SSSS”—And What Happens Next

Importantly, receiving the SSSS code does not mean you are suspected of wrongdoing. In many cases, the selection is random. In others, it may be triggered by factors such as:

Booking a ticket at the last minute
Flying internationally
Incomplete or inconsistent reservation details
Sharing a name similar to someone on a watchlist

Even frequent flyers with spotless records can occasionally be selected.

What Secondary Screening Involves

Passengers marked with SSSS undergo more thorough checks than standard screening. This may include:

Detailed hand inspections of carry-on items
Extra scanning or swabbing of electronics for explosive residue
Closer examination of personal belongings
Enhanced identity verification