Here is a rule I follow when traveling - nothing that smells! so forget about the hardboiled eggs. or eat them in the car before you enter the airport. I'm flying in June, and i'm planning on taking beef jerky, nuts, an apple, some sliced beef or turkey spread with whipped cream cheese. I only have a 3 hour flight, so I'm not worried. The only thing I will buy to eat in an airport is a Starbucks coffee, and that is IT.