Delta Airlines 2010 Annual Report Download - page 45

Table of Contents
Supplemental Information
We sometimes use information that is derived from our Consolidated Financial Statements, but that is not presented in accordance with GAAP. Certain of
this information is considered "non-GAAP financial measures" under the U.S. Securities and Exchange Commission rules. The non-GAAP financial measures
should be considered in addition to results prepared in accordance with GAAP, but should not be considered a substitute for or superior to GAAP results.
The following table shows a reconciliation of a non-GAAP financial measure to the corresponding GAAP financial measure. We use this measure because
management believes the exclusion of special items is helpful to investors to evaluate our recurring operational performance.
Year Ended December 31,
(in millions) 2010 2009
Operating income (loss) $ 2,217 $ (324)
Item excluded:
Restructuring and merger-related items 450 407
Operating income excluding special items $ 2,667 $ 83
Glossary of Defined Terms
ASM—Available Seat Mile. A measure of capacity. ASMs equal the total number of seats available for transporting passengers during a reporting period
multiplied by the total number of miles flown during that period.
CASM—(Operating) Cost per Available Seat Mile. The amount of operating cost incurred per ASM during a reporting period.
Passenger Load Factor—A measure of utilized available seating capacity calculated by dividing RPMs by ASMs for a reporting period.
Passenger Mile Yield or Yield—The amount of passenger revenue earned per RPM during a reporting period.
PRASM— Passenger Revenue per ASM. The amount of passenger revenue earned per ASM during a reporting period. PRASM is also referred to as "unit
revenue."
RPM—Revenue Passenger Mile. One revenue-paying passenger transported one mile. RPMs equal the number of revenue passengers during a reporting
period multiplied by the number of miles flown by those passengers during that period. RPMs are also referred to as "traffic."
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