You cannot talk about “how much is a bus” without mentioning the Big Red Tour Buses. Those open-topped, sightseeing deals? They are not the same as the TfL bus.
How Much Is The Bus Fare _ Transport For London Bus Prices – DXKDD
A 24-hour ticket for one of those costs around £35. That’s twenty times more than a regular bus ride. You are paying for a commentary about King Henry VIII and a live-in pervert who says “lovely jubbly.”
Is it worth it? Only if you really, really love the wind in your hair and facts about the Gherkin. Otherwise, stick to the £1.75 bus. It goes to the same places.