Snacks are great especially if you get a sudden craving while in the air or want to change the mood especially on a long-haul flight. They should be easy to consume, solid and non-perishable.

Whether you should eat on a flight depends on the duration of the trip and your body's sensitivity to altitude. At high altitudes, the low humidity and cabin pressure can reduce your sense of taste and smell by up to 30%, often making food seem bland. Physiologically, digestion slows down in the air, which can lead to bloating, gas, and general "gastrointestinal discomfort" because gases in the gut expand as cabin pressure drops. For long-haul flights, eating is necessary for energy, but experts recommend sticking to light, easily digestible meals like lean proteins and vegetables while avoiding "gassy" foods like broccoli, beans, or heavy carbonation. On shorter flights (under 3 hours), many frequent travelers choose to fast or eat a nutritious meal before boarding to minimize digestive stress and jet lag. Regardless of whether you eat, the most critical rule is to stay hydrated with water, as the dry airplane air can lead to headaches and fatigue much faster than hunger will.