My first In ''n Out was the one on Vineyard in Ontario - right by the old entrance to ONT. Since then, I have scoped out and dined in the ones closest to LAX, SAN, SFO, FAT, PSP, and LAS once arriving at those airports. And, if I'm taking the noon balloon back east (home is DC), I remember that they actually open at 10am (even though the sign says 1030a) and will stop for a double-double before heading back home. It beats airplane food, even what passes for first class these days.