Average daily prices for South American itineraries vary depending on the type of cruise you select. With such a short sailing season and so few cruise lines with ships in the region, you can expect premium prices on all cruises. Fares on luxury lines such as Silversea, Seabourn, Regent, and SeaDream may average three or more times the fares charged by premium and mainstream cruise lines like Holland America Line, Princess, Celebrity, and Norwegian Cruise Line. The length of the cruise and type of cruise line are the biggest factors that determine the cost.