Secure authentication and delayed transaction processing for booking management systems is provided. Third-party services partner with booking management systems to aggregate and list offerings of the third-party services in a digestible display on a one-stop platform. A booking management system can manage the authentication of payment card information on behalf of any number of such third-party services. The booking management system can maintain and process authentication information associated with traveler payment cards, and provide virtual payment information to the third-party services for delayed transactions. The third-party services may later initiate the delayed transactions using the virtual payment information, without being required to perform authentication processing on the traveler payment card information maintained by the booking management system.