Circa 2019: (Pre-COVID....)
https://news.miami-airport.com/front...m-mia-in-2020/
(Miami, December 19, 2019) – On December 18, low-fare carrier
Frontier Airlines announced the establishment of a new 130-employee crew base and eight additional routes at Miami International Airport in 2020, including first-time international service for the airline from MIA. The new routes to Austin; Baltimore; San Salvador, El Salvador; Guatemala City, Guatemala; Islip, New York; Ontario, Calif.; Santo Domingo, Dominican Republic; and Trenton, N.J. – all commencing between April and June of 2020 - will
expand Frontier’s service to 22 nonstop destinations from MIA.
Looks like they had 14 cities prior to the announcement, with 8 added, to make 22 destinations. Again, pre-COVID. Not sure how gun-shy Barry and company is now, but 20 always seemed to be the happy spot for the prior bases, to include DFW.