London Heathrow Airport is famous for being the most internationally connected city in the world and for being one of the busiest airports in the world. Heathrow boasts some of the world’s longest nonstop flights and was a focus point of the now-retired supersonic Concorde. In particular, Heathrow has many connections with New York-JFK (which is once again a focus route for the development of the supersonic Boom Overture). Heathrow remains a top destination for the famous Airbus A380 Superjumbo aircraft. Here are the 12 longest routes from London Heathrow and the airlines competing on those routes according to data from Cirium, an aviation analytics company.