The article examines the essence of the concept of digital transformation of enterprises, which includes the introduction of digital technologies into the enterprise's business processes, management processes, and communication processes. The available approaches to assessing the level of digital transformation of enterprises, which is a necessary tool for further development strategy, were analyzed. It was determined that existing studies and scientific publications on the formation of systems for evaluating the level of digital development need some refinement, taking into account the specifics of the enterprises to which they are applied. A unique approach to forming an assessment of the level of digital transformation of aviation enterprises was proposed, according to which it is proposed to apply an integral assessment that takes into account indices of digital activity, maturity and interaction. The advantage of this approach is taking into account the specific processes inherent in aviation industry enterprises and forming a tool that allows you to assess the possibility of functioning of various aviation market subjects in a single information field. Special attention was paid to the method of calculating indicators that are part of the indices of digital activity, maturity and interaction. Thus, the assessment of the level of digital transformation of aviation enterprises will allow in the future to develop a joint strategy for the formation of a digital space in which the subjects of the aviation market will function.