This study aims to examine the influence of knowledge management processes and organizational creativity on service innovation for international airports in Saudi Arabia. A questionnaire was used to collect data from a convenient sample of 315 respondents. The results extend the “spiral” knowledge assumption to include knowledge sharing and application processes. The study finds that knowledge creation has a significant positive impact on knowledge sharing, which in turn influences knowledge application. Moreover, knowledge management processes have a significant positive impact on organizational creativity, whereas organizational creativity does not have any impact on service innovation.