C1
CanXpress
Canada
IATA
C1
Charlie One
ICAO
CA1
Radio Callsign
CAX
Example: "CAX One Two Three" for C1123
About the "CAX" Callsign
When CanXpress pilots communicate with air traffic control, they identify themselves using the radio callsign "CAX" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "CAX Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.