Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Rochester, New York to Pisa as you normally would.
ROC stands for Rochester Greater Rochester Intl Airport, while PSA stands for Pisa Gal Galilei 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.