If you're flying with Southwest Airlines from San Francisco International Airport (SFO), it's important to know your terminal to ensure a smooth travel experience. What terminal is Southwest Airlines at SFO? Southwest Airlines operates out of Terminal 1 at SFO. This terminal is also known as the Harvey Milk Terminal 1, a modern facility offering a range of amenities including shops, d... https://airlinesairportsterminals.com/southwest-airlines/sfo-terminal-san-francisco-airport/