Every term is defined twice: once the way a filing would put it, and once the way somebody would explain it to you across a table. The second one is usually the one that sticks.
Showing 3 terms
An airline’s capacity: seats flown multiplied by the kilometres they are flown.
The denominator for every airline unit measure — revenue and cost are both quoted per seat-kilometre.
Cost per available seat-kilometre: operating cost divided by ASK, often shown with and without fuel.
The airline’s cost base per unit of capacity. CASK excluding fuel shows the part management controls.
Revenue per available seat-kilometre: total revenue divided by ASK.
Load factor, fares and extras rolled into one number, to be set against the cost per seat-kilometre.