This study aims to analyze the implementation of Islamic principles in the services of a Hajj and Umrah travel agency and their implications for service quality and pilgrims’ trust at Tunas Tours Probolinggo Branch. This research employed a qualitative approach with a case study design. The research subjects consisted of the branch manager, operational staff, and pilgrims selected through purposive sampling. Data were collected through in-depth interviews, observations, and documentation, and were analyzed using the interactive model of Miles and Huberman, which includes data reduction, data display, and conclusion drawing. The results indicate that the implementation of Islamic principles is reflected in the values of trust worthiness (amanah), transparency, and fairness across various aspects of service. The principle of amanah is demonstrated through honesty and responsibility, transparency is shown in the openness of information regarding costs and facilities, while fairness is reflected in equal and non-discriminatory services. However, several challenges were identified, including communication barriers, differences in pilgrims’ understanding, and technical issues in the field. This study concludes that the implementation of Islamic principles has a positive impact on service quality and pilgrims’ trust, thus requiring consistency and continuous improvement in service management.
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