It really pays to research the cheapest route to travel. This is how we shave £1000 off the cost of our flights in the summer and £12 a week off the cost of our commute into London. Transport providers e.g.) Transport for London, will rarely tell you which is the cheapest route but rely on you to find out.
For instance, the airline did not tell us of the saving if we flew to Toronto rather than Boston. Transport for London did not tell us that at Peak time our ticket would cost £2.30 less if we travelled a slightly different route to work. Early retirement bloggers may show you how much you can save by cycling to work but not the bus companies. Do your own research, it really pays !