Airline travelers are going viral for sharing the details behind the "dreaded" letters "SSSS" that can appear on your boarding pass before a flight. Here's what they mean.

The service is available at airports including Brisbane, Melbourne, Perth, Canberra and Sydney Terminal 3, and will be deployed at Sydney Terminal 2, Adelaide, and Newcastle in the coming months.

Ryanair first announced the new boarding pass rules at a press conference in Dublin in September 2024. The firm’s CEO, Michael O’Leary, said that procedures are already in place for any ...