Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to Limassol as you normally would.
Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Limassol. Flights to Limassol from Philadelphia in February are about $1,174 on average during February, but can be found for as low as $857.