Generally speaking the ferry is usually slightly cheaper, but whichever option you choose, make sure to shop around for deals and book well ahead of time to get the best-value fares.
Vehicles over 20' must reserve through the call center at 888-443-3779 or 631-473-0286, #8 main menu. Priority vehicle space. - See terms and conditions. --GOOD FOR TRIP OF ISSUE ONLY, MUST ARRIVE AT LEAST 20 MINUTES PRIOR TO DEPARTURE -See terms and conditions for details.
All bar coded tickets will be scanned before boarding. Walk on passenger bar codes will be scanned before they cross the gangway. For Cars, please arrive 30 minutes before your departure time. We reserve the right to deny your passage if you do not arrive 30 minutes before your departure time.
That said, some ferries sell out, or require you to reserve a spot in advance (especially if you bring a vehicle). Tickets are often more expensive when purchased at the last minute, so by planning ahead and buying your tickets online you can likely save some money.
Ferries. Though slower than travelling by plane or via the Channel Tunnel, the ferries plying between Dover and Calais offer the cheapest means of travelling to France from the UK and are particularly convenient if you live in southeast England.