If you go:
The National Park and the Hotel Salto Chico are open all year round, and a good time to visit is from October to April (Spring and Summer in the southern hemisphere) when the days are longer as a result of the extreme southern latitude of the park. Yet, despite its latitude, Torres del Paine National Park is blessed with a microclimate that provides pleasant daytime temperatures throughout the year and keeps winter temperatures at moderate levels. In point of fact, the inhabitants of the area say that every day is a good day to explore the landscape of their remote land. Each season has its own beauty, colors and aromas; each reveals new and different aspects of this wonderful place.
Most packages include land transfers from Punta Arenas, Chile southernmost city and its international airport. The minibus journey is just under four-and-a-half hours: The journey from Punta Arenas to Llanuras de Diana, along 124 miles of paved road takes two-and-a-quarter hours. From there, the 118 miles to Torres del Paine National Park is mainly along dirt roads and takes two hours and 20 minutes. There is a stop at Llanuras de Diana for about half an hour for a light meal provided by Explora.
Additionally, hotel packages include full board (three meals daily plus Onces, Chilean tea time; daily explorations in the park; use of all facilities (sauna, lap pool, Jacuzzi and more); and transfers back to Punta Arenas for the flights home.