It doesn't matter if I just ate a huge meal, I step onto an airplane and am hungry. Sometimes I get fancy and make food and bring it, but other times I fall prey to airport food or WORSE airplane food. Then it came to me. Instant oatmeal. Healthy, filling, add water and presto! Now I keep a couple bags in every carry on (and a plastic spoon, or you will be sipping it). My instant oatmeal of choice is the organic kind from Costco.