Many travelers are tempted to shift to empty seats on nearly empty flights for added comfort. However, Amit Mittal, Director of AeroIntellect Aviation, emphasizes the importance of assigned seating for safety and balance. Before takeoff, crucial pre-flight checks, including 'Weight and Balance' calculations, are performed based on the passenger manifest. If passengers change seats without notifying the crew, it can affect the aircraft's trim and performance, particularly on smaller planes. Additionally, the passenger manifest is vital for emergency situations, allowing crew members to identify and assist passengers with disabilities or medical conditions. While some empty seats may appear available, they could be reserved for passengers who have not yet boarded. Passengers should avoid moving to exit rows or premium seats without permission, as these areas have specific safety requirements. To change seats, it is advisable to ask flight attendants after boarding is nearly complete, ensuring that it does not impact safety or weight distribution.