Delta Air Lines is a major United States airline founded in 1925, and its boarding chimes, gate announcements and phone contact tones have become familiar parts of air travel in the US. Short recordings of those service sounds circulate on soundboards because they compress a whole airport experience into a few seconds. Online, the clip is less about the airline itself and more about the shared frustration and humour of delays, hold music and last minute gate changes, which is why creators keep reusing it for travel related memes and edits.