It's probably going to depend on just how you get there, how you leave and if you plan on going “from one end to the other”. There are basically only 3 ways to get to (or leave) PEI;. Cross the Confederation Bridge from New Brunswick. Take the ferry from (near) Pictou, Nova Scotia to Wood Islands, PEI. read more
PEI is 224 kms long. If you were doing an average walking pace of 5 kms an hour, and you could survive without sleep or stopping to eat,bit would take you 46 hours or just under 2 days. The width varies greatly, from an hour to an afternoon. read more