This Practice Note explains the key characteristics of an aircraft operating lease and the key differences between an operating lease and a finance lease. It considers the key provisions in operating leases, in particular, delivery conditions, the case of ACG v Olympic, rent and deposits, the right to quiet enjoyment of the aircraft and operational indemnity together with subleasing, wet leasing, events of default and redelivery. It also includes information on Export Certificates of Airworthiness.