A polar jet stream is a fast-moving, narrow band of strong winds in the upper levels of the atmosphere. It flows from west to east and forms as a result of temperature variations between the polar regions and the mid-latitudes. The polar jet stream impacts air travel from the west coast to the east coast by affecting the flight time and fuel consumption. When flying from the west coast to the east coast, airplanes can benefit from the tailwinds provided by the polar jet stream, resulting in faster travel times and reduced fuel consumption. Conversely, flying against the polar jet stream (from east to west) can cause headwinds, leading to longer flight durations and increased fuel usage.
