notitur.com August 24, 2026

Airlines

RASK

RASK is the revenue an airline earns per seat and kilometer offered, whether filled or not. It is the airline sibling of hotel RevPAR: it blends price and occupancy into one figure comparable across routes. Set against cost per seat-kilometer it says whether the operation is profitable.

Example A route with high RASK but even higher CASK loses money no matter how full it flies.

Related terms

Airlines

CASK

CASK is the cost to an airline of offering each seat and kilometer. It is the yardstick for a carrier's...

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Load factor

Load factor is the percentage of seats sold out of those offered on a flight or across a network. It is to an...

Revenue

RevPAR

Revenue per available room blends price and occupancy into one figure. You get it by multiplying ADR by...

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Air connectivity

Air connectivity is the network of routes, frequencies and destinations that link an airport or a region with...

FAQ

What does RASK mean in commercial aviation?
RASK stands for Revenue per Available Seat Kilometer, the revenue an airline earns for each seat flown one kilometer, whether occupied or empty.
How is RASK calculated?
Divide total passenger revenue by available seat kilometers (ASK). For example, if a route generates 100,000 euros and offers 2 million ASK, the RASK is 5 euro cents per seat kilometer.
What is RASK used for and how is it different from yield or load factor?
RASK combines price and occupancy into one metric, unlike yield which only shows revenue per paid passenger kilometer. It helps compare commercial efficiency across routes or airlines. A high RASK can make a route profitable even with average load factor if fares are strong.

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