An important field of the logistics study is one that is concerned with optimizing the efficiency of the use of transport resources. In Petrobras aviation segment, which transports about 20 percent of all offshore passengers worldwide, optimizations are quite significant and can generate important economic (lower total cost), logistical (increased availability of resources), environmental (lower emissions of polluting gases) and safety (reduced exposure to the risks of the activity) benefits. For these reasons, it is imperative to seek ways to increase efficiency in the use of contracted aircrafts, maximizing their use within the boundaries imposed by offshore flight rules, crew fatigue restrictions, operational restrictions of the origin and destination airports, in addition to capacity limits for each aircraft. Hereupon, the objective of this study is to present the development of solutions to reduce the costs of aerial operation, seeking the maximum use of contracted aircrafts, based on a proposal to optimize the flight schedule through the resolution of an Integer Linear Programming formulation that extends a Multiple Knapsack Problem, but within the boundaries imposed by regulations and operational needs. A computational tool was developed and results obtained from this work were implemented in Petrobras operations, and are part of this company s Resilience Plan. The economic gains obtained represent a reduction of USD 27 million in the five-year period of the 2020-2024 Business Plan, which proves the benefit of the implemented solutions.