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Terminal Location and Overview Frontier Airlines operates out of Terminal A at Orlando International Airport. Within Terminal A, you’ll head to Airside 1, which is accessed by an automated people mover (tram) after clearing security. Terminal A is located on the north side of MCO and handles several domestic airlines in addition to Frontier. If you're new to MCO or flying Frontier for the first time, reviewing a reliable guide like the one at frontier airlines mco terminal can be extremely helpful. It breaks down the check-in process, gate locations, security procedures, and ground transportation options in detail.