Air transport is the fastest means of transportation. It provides the comfort, efficient and quick transport service. It plays a significant role in the national defence of the country. It can cover very difficult terrains like high mountains, deserts, dense forests and long oceanic stretches with great ease. Air services are available to many parts of the world.

*The major regions of the world having a dense network of airways are U.S.A, Western Europe and South East Asia.

*U.S.A alone has 60% of the airways of the world.

*Today, more than 250 commercial airlines offer regular services to different parts of world.

*The nodal points where air routes converge or radiate to all continents are New York, London, Paris, Amsterdam, Frankfurt Rome, Moscow, Karachi, New Delhi, Mumbai, Bangkok, Singapore, Tokyo and Chicago.

*U.S.A developed largely post war international civil aeration.

*Some continents or countries lack air services. Africa, Asiatic part of Russia and South America lack air services.

*Due to limited landmass, economic development and sparser population Southern Hemisphere have limited air services.