This study aimed to forecast air cargo demand at Jeju International Airport using monthly cargo volume at Jeju Port as an external variable. Among SARIMA, SARIMAX, and Prophet models, the SARIMAX model with the external variable showed the best perfor...
This study aimed to forecast air cargo demand at Jeju International Airport using monthly cargo volume at Jeju Port as an external variable. Among SARIMA, SARIMAX, and Prophet models, the SARIMAX model with the external variable showed the best performance. The forecast showed a gradual decrease in airport cargo demand. The results confirmed a competitive relationship between the port and the airport and highlighted the value of using external data in logistics policy planning.