Frontier Airlines operates out of Concourse A at Seattle-Tacoma International Airport (SEA). Frontier Airlines SEA Terminal offers a variety of amenities, including dining options, retail stores, and comfortable seating areas for passengers. Frontier Airlines travelers at SEA can enjoy easy access to check-in counters, security checkpoints, and boarding gates within this concourse, ensuring a smooth and efficient travel experience. Whether you're flying domestically or internationally, Frontier Airlines provides convenience and comfort from Concourse A at SEA.