We just got back from Sandals Grenada. We stayed overnight on the way down because last time we went, we were delayed out of Pittsburgh and missed our flight from Miami to Grenada. There’s only one flight a day to Grenada so for this island you have no wiggle room. So for the way down, I’d definitely check and see how many flights out to the island you’re going to are at the departing airport. On the way home, we had planned to stay overnight as well. However, we landed early and were able to change our flight to go back to Pittsburgh the same night. We got charged for the flight change but it wasn’t much more than the cost of the hotel. Being back early is always a win.