Why are there more planes at certain times of day?
An airport has morning and evening “rush hours.” Air transport is not very different from other modes of transportation. On highways, bridges, as well as subway and commuter trains, there is always more traffic when people are travelling to or from work. The same goes for air transport: many domestic and transborder flights leave early in the morning, carrying businesspeople who return in the evening of the same day. On transatlantic routes, meanwhile, planes usually arrive in the afternoon and leave in the evening. To enable two daily turnarounds, some planes serving southern destinations leave very early in the morning, return in the afternoon, take off again, and return late at night.