The Indian civil aviation industry has an oligopoly market structure with key players like Indigo, Air India, and Vistara. It accounts for 0.7% of India's GDP and employs over 65,000 people, making India the 3rd largest aviation market in 2017. Demand is affected by factors like ticket fares, income, advertising, and government regulations. Supply is influenced by production costs, number of providers, government policies, technology, and climate conditions. The industry generates jobs and contributes to the economy but faces challenges from various external factors.