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An international airport is an airport that offers customs and immigration facilities for passengers travelling between countries. International airports are typically larger than domestic airports and often feature longer runways and facilities to accommodate the heavier aircraft commonly used for international and intercontinental travel. International airports often also host domestic flights. Some, such as Frankfurt Airport in Germany are very large; others such as Fa'a'ā International Airport in Tahiti, are quite small. Buildings, operations and management have become increasingly sophisticated since the mid 20th century, when international airports began to provide infrastructure for international civilian flights. Detailed technical standards have been developed to ensure safety and common coding systems implemented to provide global consistency. The physical structures that serve millions of individual passengers and flights are among the most complex and interconnected in the world. By the second decade of the 21st century, there were over 1,200 international airports and almost two billion international passengers along with 50 million metric tonnes of cargo were passing through them annually. == History == In August 1919, Hounslow Heath Aerodrome, in London, England was the first airport to operate scheduled international commercial services. It was closed and supplanted by Croydon Airport in March 1920. In the United States, Bisbee-Douglas International Airport in Arizona became the first international airport of the Americas in 1928. The precursors to international airports were airfields or aerodromes. In the early days of international flights, there was limited infrastructure, "although if engine problems arose there were plenty of places where aircraft could land". Four-engined land planes being unavailable for over-water operations to international destinations, thus/therefore flying boats became part of the solution. At the far end of the longest international route (which became the Kangaroo Route), on-water landing areas were found in places such as Surabaya and in the open sea off Kupang. In Sydney, Rose Bay, New South Wales, was chosen as the airport landing area.〔 International airports sometimes serve military as well as commercial purposes and their viability is also affected by technological developments. Canton Island Airport, for example, in the Phoenix Islands (Kiribati), after serving as a military airport during the war, was used as a refueling stop by commercial aircraft such as Qantas which stationed ground crew there in the late 1950s. The development of the Boeing 707 in the early 1960s introduced the ability for planes to fly longer distances without re-fueling which eventually resulted in Canton Island Airport, like many others such as the Kai Tak Airport in Hong Kong, to be decommissioned. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「International airport」の詳細全文を読む スポンサード リンク
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