If you're wondering what terminal is Southwest Airlines at SFO, the airline operates out of Terminal 1, also known as the Harvey Milk Terminal at San Francisco International Airport (SFO). During my trip, I found Terminal 1 to be modern, spacious, and easy to navigate, with efficient check-in counters, quick security lines, and plenty of seating areas. The terminal also offers a variety of dining and shopping options, along with charging stations and free Wi-Fi, making the travel experience smooth and comfortable. Whether you're departing or arriving, Southwest Airlines at SFO Terminal 1 provides a hassle-free journey.