The routes that led to the fine:
from April to
August of 2022, Frontier operated a chronically delayed flight between St. Thomas and Orlando,
(Flight 131, STT-MCO). In addition, from December 1, 2022, through April 30, 2023, Frontier
operated two chronically delayed flights: (1) between Atlanta and Phoenix (Flight 1563, ATLPHX); and (2) between Orlando and Houston (Flights 1251/1043, MCO-IAH).
Frontier argued that STT-MCO issues were related to wind direction and construction at STT caused them to require a fuel stop at SJU in some cases. It seems crazy to me that making a fuel stop 68 miles away was necessary, but sounds like they couldn't carry a full fuel load when leaving STT.