Cities have become important drivers in promoting strategies for sustainable development. The primary objective of this article is to analyze the differences between public transportation in Newcastle upon Tyne, the city considered the most sustainable in the United Kingdom, and Florianópolis, a city with great potential for sustainable policies located in southern Brazil. This comparison may provide models, ideas and actions for the development of Florianópolis as a model of sustainability in South America. Therefore, a comparative analysis is provided: to observe changes, build models, and verify similarities and differences, while seeking to discover which behaviors govern political and social phenomena in the area of urban sustainability. This paper provides a comparative description of social and economic indicators: GDP per capita, inflation, employment, as well as the historical population evolution of the two cities. This work contrasts the sustainable transport model used by Newcastle and the reality of the transport needs of Florianópolis. This article is the first in a series to analyze the indicators for sustainable cities, focusing mainly on the reality of the South American city.