A regional airliner is a type of aircraft designed to operate short to medium-haul flights, typically connecting smaller airports to larger hubs. These planes usually have a seating capacity of 30 to 100 passengers and are used by airlines to serve less populated areas where demand for air travel is lower. Regional airliners are often operated by regional airlines under a code-sharing agreement with larger carriers. This allows major airlines to offer more destinations without needing to operate their own smaller aircraft, enhancing connectivity for travelers in various regions.