Airline baggage and reservation change fees added a lot to the bottom line . Delta Air Lines collected the most fees of any U.S. airline reporting . Total revenue for all passenger airlines last year was $ 159.5 billion , while total operating expenses were $ 153.6 billion . Comment:
Airline baggage and reservation change fees added a lot to the bottom line . Delta Air Lines collected the most fees of any U.S. airline reporting . Comment: