PT Garuda Indonesia (Persero) Tbk Branch Office Semarang is an airline of Indonesia which serving consumer over the world. This company has three departments; which are Station & Service, Sales & Service, Finance. The objective of this final report was to find out the effect of the level of consumer perceptions of the service quality of PT Garuda Indonesia (Persero) Tbk Branch Office Semarang. Questionnaires, and literature studies were the instruments used to collect data. Questionnaires were distribute to 100 respondents. As for the sampling method, it is by using purposive sampling.Multiple three box methods was used to analyze the data. Descriptive analysis to determine the effect of the level of consumer perceptions of the service quality of PT Garuda Indonesia (Persero) Tbk Branch Office Semarang. The formula that used was Index Value =[(%F1x1)+(%F2x2)+(%F3x3)+(%F4x4)]/4. From the formula, the data that collected show high result. Where means that the index of service quality was influence 89,2% by reliability, 97,4% by responsiveness, 92,75% by assurance, 86,6% by empathy, 82,1% by tangible. Therefore, the company should maintain the existing service quality and the company should increase their service quality.