The key differences between the Sabre API and the Travelport API for flight inventory management are:

1. Data Sources: Sabre API and Travelport API may source flight inventory from different networks and airlines, leading to variations in available options.

2. API Features: Differences in features such as search capabilities, filtering options, and booking functionalities.

3. Real-Time Updates: Variations in the speed and accuracy of real-time updates on flight availability and pricing.

4. Integration Complexity: Differences in integration complexity and requirements for each API.

5. Ancillary Services: Differences in the range and management of ancillary services like seat selection, baggage, and upgrades.

6. Pricing Models: Variations in pricing models and fee structures for accessing flight inventory.

7. Global Reach: Differences in global reach and availability of international flight options.

For a detailed comparison, Provab’s API Integration Services can provide insights and support.

In summary, differences include data sources, API features, real-time updates, integration complexity, ancillary services, pricing models, and global reach.