In this highly competitive aviation market, airport management are demanded to find ways tornattract new customers, retain existing customers, and pursue customersâ€™ loyalty. The quality ofrnthe service which has to be delivered to the customers has been considered as a critical factorrnfor the success of the service providers by a reason of its close connection to customerrnsatisfaction. This paper aimed to assess the effects of service quality of the Addis AbabarnInternational Airport passengers and identify what dimensions they have to prioritize to attainrncustomer satisfaction. SERVPERF model was employed to achieve the objective, consideringrnfive service quality dimensions, namely; tangibility, assurance, responsiveness, empathy &rnreliability). Both descriptive and inferential statistics applied to investigate research problems,rnobjectives, and questions. Besides, the paper employed both primary and secondary data. Thernstudy adopted a structured questionnaire to collect the primary data using a simple randomrnsampling technique. For this study, three hundred and eighty-four (384) questionnaires wererndistributed to passengers in AABIA and three hundred and seventy-two (372) valid questionnairesrnused for data analysis and reporting. According to the findings of the study, all the five servicernquality dimensions have shown a positively significant effect on customer satisfaction. Thernfindings of the study reveal that reliability and tangibility attributes need improvement as comparedrnto other service quality dimensions. The overall level of service quality delivered in AABIA hadrnnot satisfied respondents of the survey.