Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Savannah to Ocho Rios as you normally would.
SAV stands for Savannah/Hilton Head Airport, while OCJ stands for Ocho Rios Boscobel Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.