Airlines have imposed a variety of fees on a range of optional services, such as checked and carry-on bags; meals; blankets; early boarding; and seat selection. According to airline officials, the fees are based on a combination of factors, including the cost of providing the service, competition, and consumer demand. The fees have supplemented airline revenues, providing at least $3 billion in 2009. However, information about the fees is not fully disclosed through all ticket distribution channels used by consumers, making it difficult for them to compare the total cost of flights offered by different carriers. This book addresses the nature and relationship to cost and disclosure of airline fees; the potential impact of such fees on the Airport and Airway Trust Fund; checked and mishandled baggage issues; and the process, if any, for refunding government-imposed taxes and fees when passengers do not use non-refundable tickets.