Callsign NKS is Spirit Airlines
WHAT AIRLINE IS NKS?
NKS is the ICAO three-letter callsign prefix for Spirit Airlines. When a radio scanner, flight tracker or radar scope shows a flight like NKS123 or NKS45XY overhead, that's a Spirit 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 NKS for its type, registration, route and photo.