London Heathrow, serves over 100 airlines, they fly to many destinations both in Europe and around the world. This airport is suggested for anyone who wants an airport capable of serving any route or aircraft. It is one of six international airports serviLondon Heathrow, serves over 100 airlines, they fly to many destinations both in Europe and around the world. This airport is suggested for anyone who wants an airport capable of serving any route or aircraft. It is one of six international airports serving the city of London and in 2019 was Europe’s second busiest airport by passenger traffic. Making a true work horse of many international airlines.ng the city of London and in 2019 was Europe’s second busiest airport by passenger traffic. Making a true work horse of many international airlines.