Day 4: The CAT ferry ride from Yarmouth, Nova Scotia to Portland, Maine 5.5hrs from port to port, but getting through customs all depends on where your car position is on the boat! Luckily we were 3rd in line and got right back into America.. most other people had to have their cars searched. I loved this ferry and will never drive the 9.5hrs Nova Scotia again.. it is totally worth the money! They had a bar on board, along with cafe, restaurant, gift shop, movies. I was mesmerized by the water and literally stared out the window the entire time.