An-158 is the result of further development of An-148 regional jet aircraft. It is designed for transportation of 86 passengers in two-class arrangement of seating for the distance up to 3100 km, 99 passengers in one-class arrangement of seating for the distance up to 2500 km.
High level of An-158 and An-148 unification guarantees the reduction of aircraft price, tuition expenses, technical maintenance and repair expenses.