London has five main international airports: Heathrow, Gatwick, London City, Luton and Stansted. Heathrow Airport is the largest and busiest of them; it has five terminals (T1 - T5) and has two runways that run parallel. Gatwick Airport is the second largest and busiest airport after Heathrow. It has two terminals (North and South) and a single runway. London City airport is the closest airport to Central London - approximately 9km away. Stansted Airport is approximately 64km from the city centre; it is the furthest airport from Central London. You can catch flights from London to Dublin from any of the five main airports.