United Airlines operates out of Concourse A at Seattle-Tacoma International Airport (SEA). The United Airlines SEA Terminal offers United customers a comfortable experience with easy access to amenities like dining options, shops, and a United Club lounge for eligible passengers close to Gate A9. The terminal is ideal for both business and leisure travelers, featuring charging stations, Wi-Fi, and clear signs for simple navigation. Modern amenities and efficient security measures at SEA ensure that United passengers have a seamless journey.