Terms

Welcome to the Terms page. Here you will find useful information regarding common terms used in this blog. Within a matter of minutes, you’ll know the meaning of terms such as: RPMs, ASMs, ILS and IFR. Hope this helps.

- Airline Business Measurements:

I have to thank American Airlines for this. They are the only airline, to my knowledge, that has posted a nice overview of the key measurements used in the airline business.

Available Seat Mile (ASM), A Measure of Capacity: One seat, filled or unfilled, equals one available seat mile.

Revenue Passenger Mile (RPM), A Measure of Production: A passenger paying for flying one mile. 200 Passengers flying 300 miles = 60,000 RPMs

Load Factor, Production Compared to Capacity: System wide load factor = RPMs / ASMs. For individual flight load factor = Revenue Passengers on board / aircraft capacity.

Yield, Revenue per Passenger Mile: System wide = Passenger Revenue / RPMs. Customer’s yield = ticket price / mileage.

Revenue per Available Seat Mile (R/ASM): Load factor x Yield.

Cost per Available Seat Mile (C/ASM): Unit costs = Total operating expenses / Total ASM capacity.

- Great Sites to Search

Still can’t find what it means, try these websites (thanks to my Dad for finding these):

Aviation Acronyms and Abbreviations
Glossary of Airport Acronyms (FAA)
More Acronyms
Acronyms (Large database)