Airports of London Heathrow, more than Paris and Frankfurt combined, and Heathrow is the European terminus for 11 of the 25 busiest north Atlantic routes. The busiest long-haul route in the world is between London (Heathrow and Gatwick) and New York (JFK and Newark), with a total of 3,898,460 passengers travelling between the two cities in 2011. Airports of London The metropolitan area of London, England, United Kingdom is served by six international airports and several smaller airports. Together, they make the busiest airport system in the world by passenger numbers and the second-busiest by aircraft movements. In 2016, the six airports handled
London Underground ticketing as 'auto top-up'. Tickets and pay as you go credit can be purchased via a website or over the telephone. The Oyster card system is designed to eliminate the need to purchase tickets at the station for most users. Following the implementation of the technology London Underground reduced the number of staff working in ticket offices. Contactless Visa, Maestro, MasterCard and American Express debit and credit bank cards issued in the UK, as well as contactless enabled smartphones and smartwatches using Apple Pay and Android Pay are accepted for travel on London Underground, London Overground, Docklands Light Rail, most National