NY 24 soon turns eastward into the hamlet of Flanders, becoming a two-lane residential street through the community. At Wood Road Trail, NY 24 bends southeast through Flanders, paralleling the eastern end of Reeves Bay. Making a large bend along Reeves Bay, the route passes several bayside marinas and the Big Duck, a building on the westbound side of NY 24 designed in the shape of a duck. After Pleasure Drive, NY 24 winds eastward through Southampton, working out of the Reeves Bay area for a large dense area of trees to the east. A short distance later, the route enters Sears Bellows County Park, soon changing monikers to Riverhead–Hampton Bays Road. At Bellows Pond Road, NY 24 leaves the county park, passing south of Red Creek Park before bending southeast into an interchange with Sunrise Highway (NY 27) at exit 65. Just after the cloverleaf, NY 24 ends at an intersection with CR 80 (West Montauk Highway) in the community of Hampton Bays.