As well as the United Kingdom, its place of invention, the bar is also sold as Aero in Argentina, Australia, Bulgaria, Canada, Colombia, Croatia, the Czech Republic, Estonia, Germany, the Republic of Ireland, Kuwait, Malta, Portugal, Poland, Serbia, Spain, New Zealand, Japan, South Africa, Bahrain and the United Arab Emirates.
In Brazil the bar is known as Suflair. In Hungary it is sold by Nestlé as Boci Aero and in the Netherlands it is sold by Nestlé as Bros (meaning 'brittle'). Aero enjoys a large market following in South Africa with Aero, Aero Mint and, recently, White Aero and Cappuccino Aero.
The Aero bar was made available for a short time in the United States by Nestlé during the 1980s, though it seems not to have been a commercial success. However, they are still available at certain specialty vendors or supermarkets such as Big Y that import the bars. Previously the The Hershey Company sold Aero bars in the United States under license from Rowntree Chocolate Company from 1937 until 1939.
Aero bars can be found and purchased in the United States at Giant Eagle, Super Stop and Shop, Shaws, Star Market, Wegman's, FoodBasics, and some Kroger stores that have international food aisles. They can also be found in the world foods section of some Meijers (as recent as July 2009) as well as Cost Plus World Market.