The term MCO Frontier Terminal commonly refers to the section of Orlando International Airport where Frontier Airlines operates its gates and passenger services. This is primarily located in Airside 1 of the airport. Airside 1 is part of Terminal A, which is divided into Airside 1 and Airside 2. Frontier shares this terminal with a few other airlines, but it dominates a large portion of the gate activity, especially for domestic flights. https://airlinesofficesworld.com/frontier-airlines-mco-terminal-orlando-international-airport/