The best time to visit Salar de Uyuni depends on the experience you want. From May to October, the dry season typically brings clearer skies, more predictable driving conditions, and the classic white salt-flat landscape, making it a good choice for sightseeing and photography. From January to March, rainfall can create the famous mirror effect, when a thin layer of water reflects the sky across the salt flats. Travel conditions can be more challenging during this period, and the mirror effect depends on recent weather. Choosing when to visit ultimately comes down to whether you prefer dry landscapes and easier travel or dramatic reflections.