London has had a record year for air passengers with more than 144.7 million travelling through the capital last year.
The figure is seven per cent up on the previous year putting it 24 per cent ahead of its nearest rival – New York.
It was also 44 per cent ahead of the Gulf airports and 86 per cent ahead of any European rivals, the most popular being Paris.
The busiest single airport is Atlanta in Georgia, which Independent Travel Correspondent Simon Calder said is a small city but an important connecting hub.
The second busiest is Beijing in China which received 86 million passengers last year.
But Dubai knocked Heathrow off the top spot for the number of international travellers.
Simon explains on Wake Up London what this could mean for airport expansion in London.