Online check in is an online service check in for passengers by their personal smartphone that can be done anywhere within a maximum of 30 minutes before flight. In its implementation, passengers of Citilink Airlines at Bandung Husein Sastranegara International Airport still have several problems when using this service that leads to the implementation of online check in is not optimal. The purposes of this study are to examine: 1) The constraints experienced by passengers when traveling online check in, 2) Efforts to optimize implementation of online check in. This study uses a qualitative method with a descriptive approach. Data collection was carried out through observation techniques, interviews, literature studies, and documentation. To prove the validity of the research data, source and method triangulation tests were carried out. The results showed that the common problems experienced by Citilink Airlines passengers at Bandung Husein Sastranegara International Airport when using online  check in are unstable signal, error on website, fault input of booking code and the passenger's last name, as well as the passenger's lack of understanding and enthusiasm for the online check in itself. Based on these problems, the optimization efforts undertaken include the provision of wifi at airports, diversion from online check in to check in counter, as well as more active education from officers to passengers about online check in. 

The Office of the Airport Authority Region III is one of the government agencies that provide public services to the public, namely airport PAS services, therefore the Office of the Airport Authority Region III participates in the government program to build a good and clean government by designing the construction of an integrity zone towards a Serving Free Bureaucratic Area (WBBM) to improve the quality of its services. The purpose of this research is to determine the effectiveness of the WBBM predicate and the supporting and inhibiting factors in improving the quality of airport PAS services at the Office of the Airport Authority Region III. The research method used is mixed methods, which means combining quantitative and qualitative research simultaneously with the chosen strategy, namely sequential explanatory. The data sources obtained are primary and secondary data with the data collection techniques used are interviews, documentation, and direct observation at the Region III Airport Authority Office. The results of this study indicate that the WBBM predicate is effective in improving the quality of airport PAS services as evidenced by the SKM results which continue to increase from 2020 to 2022 and changes in the airport PAS service system to online services. Factors that support the improvement of the quality of airport PAS services are the six areas of change in WBBM and the existence of inhibiting factors, namely websites that have not been properly managed, human resources that have not provided excellent service, and lack of work ethic in providing services