Regional jets are small, narrow-body aircraft designed for short to medium-haul flights. They typically seat between 50 to 100 passengers and are used by airlines to connect smaller cities to larger hubs. These jets are efficient and can operate from shorter runways, making them ideal for regional travel. Manufacturers like Bombardier and Embraer produce popular models of regional jets, such as the CRJ Series and E-Jets. These aircraft are known for their fuel efficiency and comfort, providing a convenient option for travelers in less populated areas who need access to major airports.