Kensington is well served by public transport. Most of Kensington is served by three stations in the Travelcard Zone 1: High Street Kensington, Gloucester Road and South Kensington. All three are served by the Circle line which connects them to London's railway terminals. The District line also serves all three stations, albeit on different branches; it links the latter two to Westminster and the City. The Piccadilly line also links South Kensington and Gloucester Road to the West End in about 10 minutes, and in the other direction to Chiswick, Ealing, Hounslow and Heathrow Airport in around 20–40 minutes, depending on the area of choice. In addition Kensington (Olympia) in Travelcard Zone 2 serves the western part of Kensington, with District line trains to Earl's Court and High Street Kensington. Nearby West Kensington station takes its name from the former boundaries with Hammersmith and is not in the Borough.