Article Info AbstractKeywords: peak-hour passenger Brazilian airports clusters multiple regressionThis paper aims to establish a new methodology to calculate the design peak-hour passenger based on Brazilian Airport data. First, a cluster analysis using the Ward Hierarchical Method is applied grouping similar airports in terms of annual passenger throughput and EPH (Equivalent Peak-Hour). Then, we proceed with the calculation of the coefficients of variation of the aggregated hourly passenger throughput of the last seven years of the airports in each cluster. We propose the peak-hour for each airport cluster to be determined at the point where the stability of these coefficients is reached. We conclude by estimating a relationship of our proposed design peak-hour passenger as a function of the variables used to determine the clusters.