Aviation Airline fee changes come in bunches, study shows By Kate Rice / February 05, 2013 Share 1 -- A new study shows that airline fees are not only proliferating but changing frequently, making them even more confusing for consumers. TravelNerd, a comparison and search website for airline fees, found that U.S. airlines have changed their fees 52 times since January 2012. It found that 35 out of the 52 changes were fee increases, most between $5 and $10. Eighteen of the fee changes were from Spirit Airlines and Allegiant Air, low-cost carriers that have made fees an essential part of their business models. Twenty-eight of the 52 changes concerned baggage fees. Nineteen of the changes were for service fees such as ticket changes, selecting seats and priority boarding. Five concerned in-flight fees such as food and beverages, blankets, and fees for unaccompanied minors. Follow Kate Rice on Twitter @krtravelweekly.