With direct flights to Dublin, Ireland, and connections throughout Europe, Aer Lingus Airlines is based out of Seattle-Tacoma International Airport (SEA). Travelers on Aer Lingus flights benefit from easy check-in procedures, contemporary conveniences, and a seamless journey at the Aer Lingus Airlines SEA Terminal . Aer Lingus is a well-liked alternative for foreign passengers since it prioritizes comfort and customer service and offers a variety of options, including economy and business class.