Here is an infographic from the popular United Kingdom ferry company called Brittany Ferries all about the benefits of travelling to France by ferry as opposed to plane. Some of the key benefits mentioned in the infographic are, when travelling to France by ferry you can take your own vehicle, when travelling to France by ferry you can take more luggage and when travelling to France by ferry the food is much better than it is on a plane.
Infographic Source :- www.brittany-ferries.co.uk