The interruption of the dynamic development of international air transport and tourism in the period 2020 - 2021 was replaced in 2022 by growth associated with issues of sustainable development. In addition to their positive economic effects, according to estimates, air transport and tourism contributed significantly to global CO2 production in the period before the pandemic. The article deals with the sustainability strategies and concepts of selected players from the international air transport sector. The goal of the paper is to analyze and compare sustainability concepts and the way of sustainability principles implementing in management and supply chain of selected European low-cost airlines. The principal method used is a content analysis using publicly available materials and research studies. The results of the content analysis are compared in terms of environmental sustainability concept and its projection into the strategic management and governance and a supply value chain. The final results show the importance of environmental sustainability for strategic decision-making, creation of strategic competitive advantage and existence of the low-cost carriers.