To celebrate the first anniversary of Ask Boris, Boris Johnson's monthly LBC show, the Mayor and presenter Nick Ferrari broadcast from high above the Thames on the Emirates Airline.
"It is cheap as chips," Mr Johson responded when asked how much a cash single fare would set a passenger back.
"I think it's very good value for money, this is the most beautiful view in the whole of the city, I think it's absolutely stupefying. Earth hath not anything to show more fair," he said before pointing out landmarks including "the Walkie Talkie with its Aztec death ray."
A single cash fare is £4.40.