Visitor Oyster cards are plastic smartcards you can use instead of paper tickets. You top up the card with pay as you go credit which you use when you travel. It is the cheapest way to pay for single journeys on bus, Tube, tram, DLR, London Overground, Tfl Rail, most National Rail services in London and River Bus services (MBNA Thames Clippers).
Visitor Oyster cards can be reused and never expire. If you run out of pay as you go credit, simply top up your credit at a Tube station ticket machine, Oyster Ticket Stop or Visitor Centre to use your card again.
You can also use your Visitor Oyster card to pay for journeys and to get discounted fares on most Thames Clipper River Bus services in London and Emirates Air Line cable car journeys.
Visit the Visitor Oyster card product page