FlyBiddr is an innovative Software-as-a-Service solution that enables airlines to conduct real-time auctions for upgrades to unsold premium seats. Passengers have the opportunity to bid on these upgrades during the last hours before departure. The system seamlessly integrates into airlines' existing apps, providing a user-friendly experience without requiring an additional download, and ensures the highest standards of privacy protection by using anonymized user identities. Through this dynamic platform, airlines maximize their revenue from premium seat sales, while passengers have the opportunity to enhance their travel experience.