A
narrow-body aircraft or
single-aisle aircraft is an
airliner arranged along a single aisle permitting up to 6-abreast
seating in a
cabin below of width. In contrast, a
wide-body aircraft is a larger airliner usually configured with multiple
aisles and a
fuselage diameter of more than allowing more than 7-abreast seating and often more
travel classes. The highest seating capacity of a narrow-body aircraft is 295 passengers in the
Boeing 757–300, while wide-body aircraft can accommodate between 250 and 600 passengers.