Virtually all large cities and towns offer some form of public transport, among them buses and taxis which means going around in Chile is not a problem.
Info about almost all kinds of public transport in Chile which includes airlines, airports in Chile, bus routes, driving maps and trains in Chile are available at this website.
The tables underneath will cover additional information regarding the travel methods to get around Chile: Travel by rail, travel by air, and travel by bus and car.
Airports in Chile
Public Transport in Chile
Chilean Public Transport Questions