Airlines, tech companies and travel agencies can register with the International Air Transport Association for certification on the New Distribution Capability. Air France-KLM and Hogg Robinson Group are among the latest to do so. What does this certification mean?

Mostly, it's a sign. A carrier that has done what it takes to get registered (AA, BA, United) is showing it publicly supports NDC for selling tickets and ancillary services. Delta and Southwest are among those that . . .

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