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.
FAQ
Frequently asked questions.
Anything else? Ask us on a call or by email.
How is RASK calculated?
Divide total operating revenue by available seat kilometres (ASK). It is usually expressed in cents per ASK. The miles equivalent is RASM.
What is the difference between RASK and PRASK?
RASK uses all operating revenue, including cargo and ancillaries. PRASK (passenger revenue per ASK) uses only passenger revenue.
What is the difference between RASK and yield?
Yield is revenue per revenue passenger kilometre (RPK) — what each passenger kilometre sold earns. RASK is revenue per available seat kilometre, so it also reflects how full the flights are.
Wireum Insights
Wireum Insights is an airline operations and management dashboard that brings operational, commercial and passenger data — OTP, IROPS, AOG, load factor, RASK, CASK, NPS and more — into one configurable view, built on the airline's existing systems.