How long does it take from London to Paris by ferry?

From Central London to Central Paris it will take around 9 hours to reach. Generally People travel from London Charing Cross to Dover (Priory station) with trains every 30 minutes, journey time 1 hour 50 minutes. From Dover you the take a ferry to Calais(France).Ferries sail every hour or two, crossing time 1 hour 30 minutes. Take a shuttle bus from the ferry terminal to Calais Ville station or its a 15 min walk.Coming from Calais, you normally take a local train to Boulogne and change there onto an express from Boulogne to Paris.