  This study explores the approaches used by airlines in setting flight times.
It highlights the need to balance operational and strategic factors, such as
optimizing the use of resources - including aircraft, crew, and fuel - and
managing the risks related to delays and congestion. The work details a
national analysis focused on domestic flights, investigating the factors that
influence companies to adjust scheduled flight times and the impact of this
practice on punctuality. The results indicate that decisions about flight time
are influenced by both operational and strategic aspects, being affected by
competition and the sector's policies on punctuality and slot allocation.
Furthermore, it was found that adding extra time is an effective strategy for
reducing delays, although it may conceal system deficiencies.
