N323FR Frontier Airlines Airbus A320-251N Colorado The Bighorn Sheep Published 28/05/2020 at 1024 × 538 in Airbus A320 Specs – What is behind one of the most popular short-haul airliners? N323FR Frontier Airlines Airbus A320-251N Colorado “The Bighorn Sheep”. N323FR Frontier Airlines Airbus A320-251N Colorado “The Bighorn Sheep”.