The significance of environmental cost leadership strategies emerges as being an approach and a method for resolving the environment's problem within the Arabian aviation companies and how they affect the economics of air transportation in Egypt, and so the Egyptian economy and the society as a whole, leading finally to sustainable development and optimal utilization of potential resources, and keeping at the same time the future coming generations' rights. The study is to be  applied on Egyptair Company. For the previous, this research problem is crystallized in that: "Arabic airline companies are suffering from ignoring adoption of environmental cost strategies; in particular, cost leadership strategies, which lead into a mystery and non-transparency adoption of the concept of sustainable development for financial and administrative performance; causing consequently several problems and difficulties in the objective measurement of environmental costs and so in turn pricing, operations, marketing etc Research Objectives: This research purpose is to enrich the real life and the scientific research library with the significance of environmental cost strategies as one of the followed environmental strategies for resolving the environment's problem within the Arab airline companies and how they affect the economics of air transportation in Egypt, and so the Egyptian economy and the society as a whole which finally leads to the sustainable development and optimal utilization of potential resources, keeping at the same time the future coming generations' rights, in application on Egyptair Company. This research significance outflows from its handling of one of the important and modern problems encounters presently organizations and business institutions (industrial, service, or commercial) is how to conciliate between reducing environmental pollution rates and attaining a unique excellent level of environmental quality; and in return,  reducing environmental costs in terms of the intensifying levels of competition that establishments face currently which leads finally to sustainable development. Research method: First, the Inductive (Librarian – Theoretical)Method: It is counting on a mixture of referential data using the inductive approach  and some scientific references that tackle with environmental costs. Second, the Deductive Method: It is used through application on Egyptair Cargo Company and other airline companies; counting on measurement approach, personal interviews, analyzing and deduces results from basic data (primary data) using an investigation form to be distributed on employees to explore the environmental strategies used in Egyptair  company and its relation to sustainable development. Research sample: it consists of (32) individuals working in air flight sector, particularly in Egyptair Company, without neglecting other companies working in air flight field in Egypt. The sample is represented in Yemen airline, Turkey Airline, and Jordan Airline. Study Instruments: the researcher has designed an investigation form suits the research purposes and assists testing validity of hypotheses. Study results: That "There are significant differences between the financial performance in airlines companies adopting strategy of environmental cost leadership and those didn't adopt that policy. Adopting an environmental costing leadership strategy leads to increase of revenues and profits of the airline companies, reflecting in turn on achieving sustainable development for those companies. Moreover, fostering an environmental costing leadership strategy leads to improvement of the entity's image  within community, being reflected also on sustainable development.