Menu well marked for GF and looks like a lot of choices - including substitute GF bun or GF bread. No sickness afterward. We had the awesome vegetarian chili, which was just a little spicy but not so much to be detracting, and shared an order of lamb meatballs, which were nicely spiced, nice texture and served on a bed of wilted spinach. The soup states GF without crackers and we added, for a price, GF bread which came perfectly toasted and was very good bread. The Silver Diner is accessible to the A, B and C concourses but not to D or E. Pity since we usually fly on Delta out of the D but just happened to be on Southwest this time. Good but I don't think we'd go through security twice for it!