Air transportation in the Philippines Air transportation in the Philippines Air transportation in the Philippines goes back to the early days of aviation prior to World War II, during the American colonial period of the Philippines. Currently, the Philippines has several registered airline companies, but they are mostly chartered. There are two main domestic airline groups doing business as Philippine Airlines and Cebu Pacific, with AirAsia Philippines competing on some international routes. The domestic market is dominated by the Cebu Pacific group which has a 61% market share, followed by the Philippine Airlines group which has 29%, followed by AirAsia, having a 9% share. Prior
Geography of the Philippines The boundaries of the Philippine archipelago are described in Article III of the Treaty of Paris (1898), as comprising an irregular polygon. A box enclosing that polygon would have corners at 20°N 116°E, 20°N 127°E, 4.75°N 127°E, 4.75°N 116°E. The center of this box would lie at 121.5 E, 12.375 N. That point lies roughly in the center of the Tablas Strait between the islands of Tablas and Mindoro. "Republic Act No. 9522", "An Act to Define the Baselines of the Territorial Sea of the Philippines", describes an irregular polygon which fits within a box with its center at 121°44'47.45"E