Airplane food pops up in all the lame comic routines, but it’s airport food that’s the real insult to fliers’ intelligence. If you have restrictions or sensitivities, a logistical error or a layover at weird hours can leave you without any options at all — not even patently terrible terminal staples like Sbarro. (That’s why savvy travelers through SFO know that Napa Farms Market in Terminal 2 is the place to go when you have an extra minute and can’t handle the thought of five hours in the air with only a three-ounce bag of pretzels for company.)