美国西北航空公司、荷兰皇家航空公司和意大利航空公司的三方联盟获美国交通部批准的反垄断豁兔权。这项反垄断豁免权能使这三家公司紧密地调整航线和整合产品。美西北和荷航在１９９３年就成为最早获得反垄断豁免权的两家航空公司，现在这两家公司的联盟已成为业内最完善的联 The tripartite alliance of Northwest Airlines, KLM Royal Dutch Airlines and Alitalia is an antitrust exemption granted by the U.S. Department of Transportation. This antitrust immunity allows the three companies to adjust routes and consolidate products closely. Northwest and KLM became the first of two airlines to have been granted antitrust immunity in 1993, and the alliance between the two companies has now become the best in the industry