Terminal A of Charlotte Douglas International Airport (CLT) is where Frontier Airlines is based. With gates near security and check-in, the Frontier Airlines CLT Terminal is made to be a convenient and easy place to travel. Basic amenities in Terminal A include seating areas, restrooms, and a few locations for refreshments. The check-in desks at Frontier are conveniently located, and for a quicker experience, self-service kiosks are also available. To give yourself time for security processing, make sure to come early.