The formula
RASK = operating revenue ÷ ASK
Related measures:
- PRASK = passenger revenue ÷ ASK
- Yield = passenger revenue ÷ RPK
- RASK − CASK = operating margin per ASK
Example
An airline earns 400 million in operating revenue on 5 billion ASK.
RASK = 400,000,000 ÷ 5,000,000,000 = 0.08, or 8 cents per ASK.
If its CASK is 7.5 cents, it earns an operating margin of 0.5 cents per ASK.
How airlines use it
RASK lets airlines compare revenue performance across routes, seasons and years regardless of size. It moves with both price and load factor: fuller flights and higher fares both raise it. Reading it next to CASK shows whether a route or network covers its costs.
RASK in Wireum Insights
Wireum Insights reports RASK alongside CASK, yield and ancillary revenue in its revenue and cost view, by route and period.