Travelcard Zones A-D are ancillary zones in the Transport for London Travelcard scheme. They apply only to journeys to or from those few London Underground Metropolitan Line stations that lie outside Greater London, and are used in pricing both Travelcards and single journey tickets.

Stations

• Zone A: Croxley, Moor Park, Rickmansworth, Watford
• Zone B: Chorleywood
• Zone C: Chalfont & Latimer
• Zone D: Amersham, Chesham

Moor Park station is also in Travelcard Zone 6. In calculating fares to or from stations on the boundary of two zones, the station is assumed to be in the zone which yields the cheaper fare.