London is known all over the world for its Big Ben, London Bridge, and Buckingham Palace. This mega city is served by Heathrow, Luton and several other airports. Of these, Gatwick and Heathrow are the most widely recognised airports internationally.
Flights from London to Liverpool do not take a long time to reach their destination, and may take off from any of the six airports that currently serve London. Gatwick Airport is the second most important airport in London and has the world's busiest single runway. Heathrow is more popular and also one of the busiest airports in Europe.