The Airbus A319-100ceo (Current Engine Option - formerly A319-100), is a narrow-body airliner that is part of the A320 family of aircraft and is the first generation or original A319-100. The A319-100 has one emergency exit door over the wings making it easy to distinguish it between other aircraft in the family however there are some unique instances where two doors are installed. It's succeeded by the current generation, Airbus A319-100neo (New Engine Option). Both variants are in production however neither variants have many outstanding orders left to fill. This aircraft is ideal for short, medium, and some long haul routes that have low to medium demand and can easily be interchanged on routes that A320 aircraft operate. With this flexibility, airlines commonly operate both types of aircraft to give their narrow-body fleet flexibility however some airlines use them exclusively. Like the A318, the A319 has an uncommon attribute of having a wingspan longer then it's length.