Callsign RRR is Royal Air Force
WHAT AIRLINE IS RRR?
RRR is the ICAO three-letter callsign prefix for Royal Air Force. When a radio scanner, flight tracker or radar scope shows a flight like RRR123 or RRR45XY overhead, that's a Royal Air Force aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with RRR for its type, registration, route and photo.