Narrow-body aircraft are a popular choice for short- to medium-haul flights, as they are typically more fuel-efficient and have lower operating costs than wide-body aircraft. They are also well-suited for serving regional and low-traffic routes, as they can operate from smaller airports and require less runway space for takeoff and landing.

Due to their size, narrow-body aircraft typically have a single aisle, which allows for faster boarding and disembarking of passengers. They also have a lower seating capacity than wide-body aircraft, with most narrow-body aircraft able to accommodate between 100 and 200 passengers.

In contrast, a wide-body aircraft is a larger airliner usually configured with multiple aisles and a fuselage diameter of more than 5 metres (ca. 16.4 feet) allowing more than 7-abreast seating and often more travel classes.

The most common type of narrow-body aircraft are the Airbus A320 family and the Boeing 737, which are widely used by commercial airlines around the world. Other popular narrow-body aircraft include the Embraer E-Jet family, the Bombardier CRJ series, and the McDonnell Douglas MD-80 series.

Overall, narrow-body aircraft play a crucial role in the global transportation industry, providing efficient and cost-effective air travel for millions of passengers every day.