Clean energies are key to enable the decarbonisation of aviation. Clean energy production, transport and storage are all essential aspects to meet aviation needs. A range of clean energy types of fuels are being considered today by the aviation community, including ''drop-in'' aviation fuels, relying mostly on already existing fuel infrastructure at airports, and ''non drop-in'' aviation fuels, that would require new types of infrastructures. The development of suitable infrastructure at airports is therefore essential for the supply of alternative fuels. These infrastructures must also guarantee similar safety levels as for conventional jet fuels. In addition, to initiate a global aviation transition, developing a global network of infrastructures is crucial in order to allow the supply of new fuels in as many airports as possible.