How many days would it take to get from Leghorn to Marseille by boat?

The journey from Leghorn (Livorno) to Marseille by boat typically takes about 12 to 24 hours, depending on the type of vessel and weather conditions. If traveling by a ferry, it could be on the shorter end of that range. However, if you're considering a slower boat or a more leisurely route, it might take longer. Overall, it's generally not more than a couple of days for the trip.