Narrowbody aircraft, also known as single-aisle aircraft, are planes that have a fuselage width of less than six meters. These types of aircraft are commonly used for short to medium-haul flights and are typically designed to carry between 100 and 200 passengers. There are several different synonyms for narrowbody aircraft, including single-aisle planes, small jets, and regional aircraft. Other terms used to describe narrowbody aircraft include commuter planes, feederliners, and narrow-bodied aircraft. Additionally, some manufacturers and airlines may use specific names or designations for their narrowbody aircraft models, such as the Boeing 737 or the Airbus A320.