Dubai leapfrogged Heathrow to become the world's busiest airport for international passengers in 2014, the head of the Gulf hub said on Monday. Dubai International airport dealt with about 71m international passengers in 2014, according to chief executive Paul Griffiths, surpassing the 68.1 million that passed through Heathrow. "Heathrow is losing a lot of traffic to Dubai because we're able to cater for the connections that Heathrow no longer has the capacity to service," said Mr Griffiths, referring to how the UK's largest airport is operating at near full capacity on its two runways.