It is the world 's busiest intercontinental route and -- peppered with business travelers -- one of the most lucrative . London to New York is the world 's busiest air route . Eager to cash in , airlines have devised new ways to attract customers . Airlines will try anything , from Porsche ##s to merging , to win the contract .
London to New York is the world 's busiest air route . Eager to cash in , airlines have devised new ways to attract customers . Airlines will try anything , from Porsche ##s to merging , to win the contract .