The top 10 airlines reported $1.4 billion in Net Income in the second quarter Net Income and Operating Profit or Loss are two different measures of airline financial performance. Operating Profit or Loss is calculated from operating revenues and expenses. Net Income may include non-operating income and expenses, nonrecurring items or income taxes. 

As part of their third-quarter revenue, all U.S. passenger airlines collected a total of $924 million in baggage fees and $652 million from reservation change fees from July through September 2012. Fees are included for calculations of Net Income, Operating Revenue and Operating Profit or Loss. 

Baggage fees and reservation change fees are the only ancillary fees paid by passengers that are reported to BTS as separate items. Other fees, such as revenue from seating assignments and on-board sales of food, beverages, pillows, blankets, and entertainment are combined in different categories and cannot be identified separately.