The food court at the SFO United Airlines terminal has good options, not just McDonald's and Starbucks. You can choose between Chinese, Mexican, Italian and I found a bakery offering sandwiches and soup.
For what they advertise on site, Boudin has a name in San Francisco, I can see that on the different types of breads and offerings.
I wanted to try the soup, they serve it on a bread-bowl, that is, they carve the inside of a big piece of round bread by way of cutting a hole on the top and removing just enough to make room for the soup and so you end eating the soup and the bowl. They offers were Clam Chowder and soup of the day but I don´t like seafood that much and so opted for a turkey-avocado croissant.
The bread was as expected, very good and fresh, and the portion was right. Well, it was right because I ordered the "Best of Boudin," where you can choose between half a sandwich with half a salad and so I did. Otherwise it would have been too much for a quick bite while waiting for the plane to take off (I hate that the airlines are not providing food onboard anymore, but with this option it is more bearable), and it was reasonably priced, for the sandwich/salad combo I paid $7.75-plus tax (April 2006). It beats the meals they offer for $5 on the plane, and is much, much tastier.
www.boudinbakery.com