Lite info:
The only airport in the islands is Vir Savarkar Airport in Port Blair, which has scheduled services to Kolkata and Chennai. The airport is under control of the Indian Air Force. Daytime flying is allowed.
Due to the length of these routes and the small number of airlines flying to the islands, fares have traditionally been relatively expensive, although cheaper for locals than visitors. Fares are high during peak seasons of spring and winter, but fares have been decreased over the time due to large expansion of aviation industry in India