Sounds like this became popular online as creators needed a short, recognisable way to imitate the end of a public address message without recording in a real terminal. The airport ending cue is now shared on soundboards as a standalone effect, separate from any full announcement, so editors can attach it to their own voiceovers. Its use has spread across travel parodies, flight simulator clips, school skits and meme edits, where the familiar chime instantly suggests an airport setting and tells viewers the announcement part is over.