Ancillary service fee
Ancillary service fee means the fee charged for any optional service related to air travel that a U.S. or foreign air carrier provides beyond passenger air transportation. Such fees may include, but are not limited to, fees for checked or carry-on baggage, advance seat selection, access to in-flight entertainment programs, in-flight beverages, lounge access, snacks and meals, pillows and blankets, and seat upgrades.