There are many compelling reasons why London is one of the most visited cities on the planet, with an unbeatable assortment of hip attractions, sights and iconic landmarks. London's network of airports sees millions of visitors pass through their terminals each year, and flights from London to Rome can leave from any of them. London Heathrow is the largest airport, with the capacity to handle around 80 airlines travelling to 185 destinations. Gatwick is the second busiest, handling approximately 41 million passengers annually. Stansted and Luton mainly operate low-cost airlines, while London City is the smallest of the five, located in the city centre. All the airports have extensive facilities, shopping and dining on-site.