Fare zone 6 is an outer zone of Transport for London's zonal fare system used for calculating the price of tickets for travel on the London Underground, London Overground, Docklands Light Railway, National Rail services (since 2007), and the Elizabeth line within Greater London. The zone was created in January 1991; previously it had formed part of zone 5 since May 1983. It extends from approximately 12–16 miles (19–26 km) from Piccadilly Circus.