Delta, United Express Opt-In Doubt

Sales executives from Delta Air Lines and United Airlines today said their companies had no plans to pursue "opt-in" models in which global distribution system subscribers surrender a portion of their incentive payment in exchange for full-content access. In announcements related to American, Continental and United airlines, Worldspan recently signaled plans to implement "optional programs" for travel agency users, but a company executive declined to elaborate during a panel here at the Associat