These cities are busiest for business travellers

The aeroplane has shrunk our planet - and enlarged our world. When you can have a breakfast meeting in Dubai, a lunch negotiation in London and make a deal over dinner in New York, it's clear human connection has transcended geographical borders.

Knight Frank has drawn a map of the world showing the number of first-class and business-class passengers travelling by air between each city. The closer the name of the city to another and the thicker the connecting line, the greater flow of passengers between them. The larger the size of the city name, the more first- and business-class passengers it handles. The closer to the centre of the graph, the more connected the city. Smaller sub-sets of well-connected cities are clustered together by colour. Typically, one hub city acts as a gateway to the rest - such as Miami to Latin America.

London is the most dominant city hub by far. New York, Shanghai, Beijing, Hong Kong, Singapore, Washington DC, Tokyo and Guangzhou follow. If air travel is a measure of globalization, these are the world’s most globalized cities.