Why cant planes fly only during the day?
Some traffic needs to fly at night in order to meet todays business needs. Some examples of companies that rely on night flights are FedEx, UPS, and DHL. These types of companies are an essential part of our fast-paced business environment that guarantees overnight delivery to satisfy the needs of customers. Some traffic flies later at night in order to compensate for time differences in other parts of the world. Some airports can implement a curfew to control the number of aircraft that fly at night, while others, because of local needs, cannot.
