Public transport in London is anything but cheap. It is simply the most expensive urban public transport system I know of in terms of cost of monthly passes (or travelcards). Currently a monthly travelcard in zones 1-2 is £116.80 ($177.30). In comparison, a similar monthly pass in New York costs $112, $74 in San Francisco, $167 in Tokyo, $84.50 in Paris, $99.95 in Berlin, $100 in Chicago, $67.96 in Melbourne and so on.