* Transport-Related is revenue/expenses from services which grow from and are incidental to the air transportation services performed by the air carrier. Examples are in-flight onboard sales (food, liquor, pillows, etc), code share revenues, revenues and expenses from associated businesses (aircraft maintenance, fuel sales, restaurants, vending machines, etc).  

** Other revenue includes miscellaneous operating revenue (including pet transportation, sale of frequent flyer award miles to airline business partners and standby passenger fees) and public service revenues subsidy.

*** Based on U.S. Department of Transportation accounting standards, Total Operating Revenues are overstated by code share revenues which are included in both the mainline Transport-Related Revenues and the code share Passenger Revenue. Code share revenues are expensed out in the mainline Transport-Related Expense to allow a true Operating Profit(Loss). This reporting may understate all components of operating revenue, including Passenger Revenue, as a percentage of Total Operating Revenue.

**** Other expense includes purchase of materials such as passenger food and other materials; and purchase of services such as advertising, communication, insurance, outside flight equipment maintenance, traffic commissions and other services. 

# Operating margin is the operating profit or loss as a percentage of operating revenue

## Nonoperating Income and Expense includes interest on long-term debt and capital leases, other interest expense, foreign exchange gains and losses, capital gains and losses and other income and expenses.

### Net margin is the net income or loss as a percentage of operating revenue.