London Buses operates a bus from Hammersmith to Knightsbridge every 5 minutes. Tickets cost $3 and the journey takes 22 min. Green Line (operated by First in Berkshire) also services this route every 30 minutes.
From Hammersmith (Dist&Picc Line) Underground Station Tube to Knightsbridge Underground Station. 10 min £2. From Hammersmith Bus Station bus to Knightsbridge, Rutland Gardens. 22 min £2. From Hammersmith taxi to Knightsbridge. 7 min £14. From Hammersmith Uber to Knightsbridge. 7 min £11. From Hammersmith walk to Knightsbridge. 54 min. From Hammersmith Road, Hammersmith Bikeshare to Montpelier Street, Knightsbridge. 20 min.