Southwest Airlines announced the addition of Carlson Rezidor Hotel Group as a new Partner of the carrier's frequent flyer program, Rapid Rewards. Members of Rapid Rewards will receive 600 points for every qualifying stay at more than 1,000 Carlson Rezidor hotels worldwide, including Radisson Blu, Radisson, Park Inn by Radisson, Park Plaza, and Country Inns & Suites By Carlson. To celebrate the new partnership, now through March 31, 2013, Rapid Rewards Members can earn double points at participating Radisson Blu, Radisson, and Country Inns & Suites By Carlson hotels.