Measure of average fare paid per mile, per passenger, calculated by dividing passenger revenue by revenue passenger miles (RPMs).
Total Revenue per Available Seat Mile (TRASM)
Calculated by dividing total revenue by available seat miles.
Passenger Revenue per Available Seat Mile (PRASM)
PRASM is calculated by dividing passenger revenue by available seat miles. PRASM is also equivalent to the product of load factor and passenger yield.
Revenue Passenger Miles (RPMs)
A measure of volume. RPM is calculated by taking the number of passengers and multiplying by miles of flight.
CASM-Ex Fuel (CASM-Ex)
CASM-Ex Fuel is calculated by taking operating expenses, dividing by ASM and then subtracting the cost of fuel.
Earnings before interest, taxes, depreciation, amortization, and restructuring or renting costs.