- Hi! If you're flying with Southwest Airlines SJC Terminal from you'll be departing from Terminal B.It's a well-structured and traveler-convenient terminal with convenient check-in, speedy security, and a variety of dining choices. The open design and contemporary architecture ensure the experience is seamless, whether you're landing or taking off. And, Southwest Airlines' consistent service at SJC guarantees a trouble-free experience. If you love convenience and great customer service, the Southwest Airlines won't let you down. It's certainly a good option for your travels!