Kevin from the UK wrote in to say: “I think it depends also on whether you need a visa to actually set foot in a country e.g. when I came back through Saudi last Xmas, there were lots of people in transit from India, but you cannot get out of Jeddah airport without a Saudi visa. Whereas Changi airport in Singapore actually gives you a free city tour if time allows between connecting flights. So you will in my book have visited Singapore, even if it is only for 4 hours”.

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