Glossary

Definition of key operating and financial indicators

Our key operating and financial indicators are airline industry metrics that are useful in assessing the performance of an airline.

  • Available Seat Miles (ASM): A measure of total guest capacity, calculated by multiplying the number of seats available for guest use in an aircraft by stage length.

  • Average Stage Length: The average distance of a non-stop flight leg between take-off and landing as defined by International Air Transport Association (IATA) guidelines.

  • Cost per Available Seat Mile (CASM): Operating expenses divided by available seat miles.

  • Cycle: One flight counted by the aircraft leaving the ground and landing.

  • EBT (earnings before tax) Margin: A ratio that indicates the profitability of a company’s operations. This ratio does not take into account the company’s tax structure. This ratio is calculated with total revenue to EBT.

  • Flight Leg: Segment of a flight involving a stopover, change of aircraft or change of airline from one landing site to another.

  • LTM: Last twelve months

  • Load Factor: A measure of total capacity utilization, calculated by dividing revenue passenger miles by total available seat miles.

  • Operating Margin: A ratio that indicates the profitability of current operations. This ratio does not take into account the company’s capital and tax structure. This ratio is calculated with earnings from operations to total revenue.

  • Revenue Passenger Miles (RPM): A measure of guest traffic, calculated by multiplying the number of segment guests by stage length.

  • Revenue per Available Seat Mile (RASM): Total revenues divided by available seat miles.

  • Segment Guest: Any person who has been booked to occupy a seat on a flight leg and is not a member of the crew assigned to the flight.

  • Return on invested capital (ROIC): A calculation used to assess a company’s efficiency at allocating capital under its control to profitable investments. Our calculation time period includes last twelve months.

  • Utilization: Operating hours per day per operating aircraft.

  • Yield (Revenue per Revenue Passenger Mile): A measure of unit revenue, calculated as the gross revenue generated per revenue passenger mile.