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London Heathrow has regained its spot as fourth-busiest airport globally. The latest Airports Council International (ACI) table for passenger numbers in 2023 shows the UK’s biggest hub overtaking Denver, Chicago O’Hare and Istanbul to move from seventh to fourth. With 79.2 million passengers last year, Heathrow is 3 per cent below Dallas-Fort Worth in third place, and 9 per cent down on Dubai in second.