Including the order announced today, Frontier has a backlog of 89 Airbus single-aisle aircraft. The airline has not yet announced its engine selection or the seating configuration for its A321s.
Frontier began its transition to an all-Airbus fleet when it took delivery of its first Airbus aircraft in 2001. Since that time, the Airbus single-aisle family has allowed the airline to expand its route network while minimizing operating costs.
Source and image: Airbus