Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sarasota to Casablanca as you normally would.
Due to multiple factors, expect to potentially pay more when booking in December. For low rates, March can be a great choice for travel to Casablanca. Flights to Casablanca from Sarasota in March are about $955 on average during March, but can be found for as low as $685.