World Travel Holdings (No. 16 on Travel Weekly's Power List) has partnered with Southwest Airlines to power Southwest Cruises.
Phil Gouel, Southwest's vice president of product development, said cruises are one of the top travel experiences customers want.
"Our new partnership with World Travel Holdings gives customers access to all major cruise lines to complement their travel with Southwest," he said. "This partnership also gives our loyal Rapid Rewards members new ways to earn points."
Southwest customers can earn one Rapid Rewards point for each dollar spent on a cruise (does not apply to taxes, port charges and insurance). They can earn double points if they book by Oct. 31.