Which Terminal is Southwest Airlines at SFOSouthwest Airlines operates primarily out of Terminal 1 at San Francisco International Airport (SFO). This terminal is well-equipped to handle domestic flights, including those operated by Southwest Airlines, offering a range of amenities and services to travelers. Located conveniently for easy access, Terminal 1 provides check-in counters, security checkpoints, dining options, and seating areas designed to ensure a smooth and comfortable travel experience. Passengers flying with Southwest Airlines from SFO can expect efficient service and a pleasant environment within Terminal 1.