1.177 airports in Summer 2017 - only 5% of ~4000 airports worldwide with airline service, BUT... 2.Include practically all of the world's busiest outside US (29 of top 30) and major connecting hubs 3.Served 3.15 billion passengers in 2016 3.1~40% of all passengers in the world 3.2~55% of all passengers outside US 3.3~70% of all passengers in Europe
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