KF
Blue1
Finland
IATA
KF
Kilo Foxtrot
ICAO
BLF
Radio Callsign
BLUEFIN
Example: "BLUEFIN One Two Three" for KF123
About the "BLUEFIN" Callsign
When Blue1 pilots communicate with air traffic control, they identify themselves using the radio callsign "BLUEFIN" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "BLUEFIN Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.