When American Airlines announced its alternative distribution program, one of the connectivity options it endorsed was to use third-party aggregators. These would be companies certified by AA for processing offers and orders in accordance with the International Air Transport Association's New Distribution Capability.
At the industry level, IATA has certified six aggregators for that. They include two that achieved the status this year. None is based in the United States.
No major global distribution system has yet achieved full IATA . . .