JSI is a unique code, commonly called an IATA code, used in the aviation industry to identify airports. This code, along with many others, are defined by IATA (International Air Transport Association). A JSI flight refers to a flight to Skiathos Airport.
Most people fly into Skiathos (JSI) if they book a flight to Skiathos. Skiathos is conveniently located just 2.0 km from Skiathos’s city centre.
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