Quick Facts
- Type
- Financial Metric
- Also Known As
- RASM
- Used By
- Airlines, Analysts
Definition#
RASM (Revenue per Available Seat Mile) is calculated by dividing total operating revenue by the total available seat miles. It measures an airline's ability to generate revenue from capacity.
Why It Matters Operationally#
When RASM exceeds CASM, the airline is profitable on a unit basis. RASM is influenced by fare levels, load factor, ancillary revenue, and network mix.