To get from Granada to Malaga, travelers can take a 1.5 hour train ride or rent a car, which takes approximately 1 hour. The train cost is about €15-20 each way, and a rental car starts at €50 per day. Within each city, walking is the best option as attractions are located in the historic centers, but taxi and bus options are also available.
If you have more time, consider visiting the Generalife gardens at the Alhambra or the Picasso Museum in Malaga. If you have less time, prioritize the Alhambra complex since it is the highlight of Granada. Also, be sure to book your tickets for the Alhambra in advance as they sell out quickly.