What does it mean if you see ‘SSSS’ on your boarding pass?
In short, SSSS stands for ‘Secondary Security Screening Selection’, which means that those unlucky enough to be slapped with the code on their boarding pass could be spending a little while longer at security.
It affects those on both domestic and international flights to and from the US, and can see travellers subjected to added security protocols such as bag searches and extra body pat downs or scans.
The time you’re potentially delayed for could be anything from a few minutes to an hour, explains Travel and Leisure, as the checks themselves can differ from flyer to flyer.
Talking to Fox News, senior aviation writer for The Point Guys, Zach Griff, explained: “Selectees for this enhanced security are chosen in the days leading up to a flight when airlines share the manifest with US security authorities.

“SSSS can also be entirely random, and there’s no way to know when booking your flight whether you’ll be chosen as SSSS.”
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