This is a tough question for many people to answer. With airport security, there are limited options for foods to pack for longer flights. You can forget the usual yogurt, unless you pay $5 for a small carton at the airport.
I faced this dilemma recently, knowing I was going to be on the plane for 4-1/2 hours, and knowing that I simply am not happy (or fun to be around) when I have to wait too long for food . . . grrrrr – just ask my husband.
Here is what I ended up taking that worked well:
1. a bag of walnuts
2. a piece of fruit
3. a small dark chocolate bar
4. a packet of instant oatmeal and a plastic spoon – just ask for hot water
I did not need it all during the flight, but it was nice to know I had it. If I had gone on the plane empty-handed, my options would have been cookies and pretzels. It pays to plan ahead.