Frontier Airlines operates from Terminal A at LaGuardia Airport (LGA) in New York. This terminal, also known as the Marine Air Terminal, is one of the smaller terminals at LGA, offering a convenient and efficient experience for travelers. Frontier Airlines LGA Terminal provides a range of affordable flights to domestic destinations from this location. Passengers can enjoy streamlined check-in, security, and boarding processes in Terminal A, making it a popular choice for budget-conscious travelers flying from New York City.