AIR4 è il nome commerciale con il quale Delta ha chiamato una serie di applicazioni fornite come SaaS, tra cui Deltamatic (che è il principale tra questi).
Delta and Virgin Atlantic are finalizing an agreement which will provide Virgin Atlantic a new customer service platform by leveraging a number of Delta's core systems such as AXIS, SNAPP and ecommerce, with DeltaMatic at their core. The project will provide Virgin Atlantic a customized passenger service solution that will offer a consistent experience for Delta and Virgin Atlantic customers, built on Delta’s proven infrastructure. The new system will be branded AIR4 (Access Information Real-time for customers).