You'll find the largest number of repositioning cruises during the months of October and April. In fall, ships tend to relocate south to warmer winter weather. Key sailings include from Europe to Florida or the Caribbean, while some ships relocate from New England to southern U.S. ports or the Caribbean. On the Pacific side, ships that tour Alaska in the summer relocate to Florida via the Panama Canal or to Australia via the South Pacific. You'll also find ships moving from Los Angeles to South America.
The opposite happens in the spring, when ships return to the Mediterranean from the Caribbean and head back to Alaska for the summer sailing season.