In-flight amenity is a term used to describe the services and amenities offered to passengers while they are on board an aircraft. One of the most popular in-flight amenities is WIFI, which allows passengers to access the internet during their flight. WIFI is a four letter word that is commonly used to refer to this type of service. In-flight amenities can also include food and beverage services, entertainment options, and other services that make the flight more comfortable and enjoyable.