When boarding a plane, a flight attendant’s friendly “hello” may seem like simple courtesy—but it serves a crucial safety purpose.

This greeting allows attendants to discreetly assess each passenger’s condition, particularly for signs of intoxication. Many people enjoy a drink before boarding, but excessive alcohol can create serious in-flight risks. Flight attendants are trained to spot warning signs during this brief interaction.

Wizz Air’s Iona Iachim explains it also helps identify passengers who may be too unwell to fly or, conversely, those who could assist in emergencies. These early assessments form a mental safety map of the cabin.

While some may misinterpret the friendliness as flirtation, it’s all part of a professional system designed to maintain safety and efficiency. Fun codes like “BOB” (“best on board”) may be used internally, but professionalism remains key.

So next time you board, respond warmly—your greeting helps keep the skies safe.