Ton Mile Yield — The amount of cargo revenue earned per cargo ton mile during a reporting period.

 

CASM — (Operating) Cost per Available Seat Mile. The amount of operating cost incurred per ASM during a reporting period, also referred to as “unit cost”.

 

Passenger Load Factor — A measure of utilized available seating capacity calculated by dividing RPMs by ASMs for a reporting period.

 

Passenger Mile Yield — The amount of passenger revenue earned per RPM during a reporting period.

 

RASM — (Operating or Passenger) Revenue per ASM. The amount of operating or passenger revenue earned per ASM during a reporting period. Passenger RASM is also referred to as “unit revenue.”

 

RPM — Revenue Passenger Mile. One revenue-paying passenger transported one mile. RPMs equal the number of revenue passengers during a reporting period multiplied by the number of miles flown by those passengers during that period, RPMs are also referred to as “traffic”.