The global GDS flight API integration is a tool for travel agencies enabling efficient flight bookings with access to real-time inventory, multiple currencies, and payment gateways. It supports major global GDS like Amadeus, Sabre, and Galileo, and offers features such as online booking, inventory management, and 24/7 support. This system enhances market reach, facilitates customer engagement, and is vital for both travel service providers and users seeking flight deals.