Callsign THY is Turkish Airlines
WHAT AIRLINE IS THY?
THY is the ICAO three-letter callsign prefix for Turkish Airlines. When a radio scanner, flight tracker or radar scope shows a flight like THY123 or THY45XY overhead, that's a Turkish Airlines aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with THY for its type, registration, route and photo.