about 5 hours. The sailing itself was wonderful, they had a good hot lunch, and the boat had a slide you could go off into the water. But the best part was the snorkeling. Molokini is a volcano cone that is mostly submerged and ships go there often for the snorkeling. The fish have gotten used to having people around, who feed them. They're beautiful and plentiful, and the water is crystal clear. Best part of our numerous trips to Hawaii.
Whatever you do, I hope you have a great time.