People(my husband included) make fun of me for bringing snacks everywhere I go. I even brought snacks like these amazing Late July cookies and crackers on our honeymoon...to ITALY!! But, everyone who makes fun, ends up eating my snacks!!! Does not matter if we are hiking, sight seeing or sitting in traffic, someone is always hungry. 
For the plane I love fruit strips, a bag of dried cherries, pretzels...Anything that can be stored easily in zip top lock bags. Recently I have been making peanut butter sandwiches to take on the plane. Makes it easy to resist the $12 cheese plate which contains 2 slices of cheddar and 3 grapes.
