If you need a system to handle airline offers and orders, Sabre is a top candidate. It has a broad suite of airline-focused tools, including order management, inventory management and pricing and revenue optimization. Sabre uses AI and machine learning technology to improve customer satisfaction and internal operations, so it's a good choice for airlines with a high level of complexity.
Another contender is Kinaxis, a powerful supply chain management system. Although supply chain management is its main focus, Kinaxis has a rich order management feature set that airlines could find useful. Its tools include sales and operations planning, demand planning and inventory management, which can help airlines cope with disruptions and optimize order fulfillment.