Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Nashville to Torremolinos as you normally would.
Due to multiple factors, expect to potentially pay more when booking in January. For low rates, November can be a great choice for travel to Torremolinos. Flights to Torremolinos from Nashville in November are about $1,164 on average during November, but can be found for as low as $583.