Interest in Sustainable Aviation Fuel (SAF) has been rising, and supportive policies worldwide continue to drive activity in the field. This paper reviews the need for aviation decarbonisation, various SAF regulations in place globally, feedstocks and routes for producing SAF, and finally, a closer look at the issues and challenges of Municipal Solid Waste (MSW) to SAF, which is seen as a large, low carbon and potentially low-cost pathway. While the paper focuses on issues and challenges within an Australian context, the themes and insights apply to a wider set of countries.