What Terminal is Aer Lingus at SFO San Francisco International Airport's Terminal 1 is home to Aer Lingus (SFO). One of the airport's main terminals, Terminal 1, also called the Harvey Milk Terminal, handles a range of domestic and international aircraft. This terminal is where passengers flying with Aer Lingus can check in, drop off their bags, and go through security. Additionally, it has a number of facilities like lounges, shops, and food choices to guarantee a smooth journey. Checking with the airline or SFO's official website is always a good option for the most recent information on gates and services.