I searched before hand and no feature requests came up for this aircraft, though if you do see another request similar to this, please PM me.
About Frontier Airlines
Frontier Airlines is an American ultra low cost carrier headquartered in Denver, Colorado. The carrier, which is a subsidiary and operating brand of Indigo Partners, LLC, operates flights to 54 destinations throughout the United States and 5 international destinations. The airline maintains a hub at Denver International Airport with numerous focus cities across the United States. Also, under a codeshare agreement with Great Lakes Airlines, the airline connects passengers to surrounding Rocky Mountain States through their Denver hub.
About the A320
The Airbus A320 family consists of short- to medium-range, narrow-body, commercial passenger twin-engine jet airliners manufactured by Airbus. The family includes the A318, A319, A320 and A321, as well as the ACJ business jet. The A320s are also named A320ceo (current engine option) after the introduction of the A320neo. Final assembly of the family takes place in Toulouse, France, and Hamburg, Germany. A plant in Tianjin, China, has also been producing aircraft for Chinese airlines since 2009, while a final assembly facility in Mobile, Alabama, United States, delivered its first A321 in April 2016. The aircraft family can accommodate up to 220 passengers and has a range of 3,100 to 12,000 km (1,700 to 6,500 nmi), depending on model.
I hope that this aircraft will be added to the game because honestly we need some more U.S. LCC aircraft in the game.