  This work focuses on trying to understand how the construction of an
airline's network is made. For this purpose, the case of Azul was studied,
investigating which and how factors affect the decision of this airline to
enter domestic routes, in addition to analyzing how the merger of Azul with the
regional airline Trip affected the company's network planning. For this, an
academic study was conducted using an econometric model to understand the
airline's entry model. The results show that Azul's business model is based on
connecting new destinations, not yet served by its competitors, to one of its
hubs, and consistently avoiding routes or airports dominated by other airlines.
Regarding the effects of the merger, the results suggest that Azul moved away
from its original entry model, based on JetBlue, to a model more oriented
towards regional aviation, entering shorter routes and regional airports.
