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Orlando International Airport's Terminal A serves as the primary operating location for Frontier Airlines (MCO). All domestic arrivals and departures for Frontier are handled at this terminal, which is located on the north side of the airport. The check-in counters for Frontier are located on Level 3 (A-2), with gates normally ranging from 1 to 29 and 70 to 99, depending on the origin and destination of the trip. https://airlineterminalservice.com/frontier-airlines/frontier-airlines-mco-terminal-orlando-international-airport/