Airline Food

• Airlines sometimes provide meals for overseas flights, and food is often available for purchase on long domestic flights. Sticking with the airline meal might be the simplest option, but it can be expensive, and there are limited meal options on board. If you plan to take advantage of meals offered by the airline, call beforehand to ask about special dietary needs such as kosher, vegetarian and gluten-free offerings. Stick to your food budget by finding out beforehand if meals are complimentary or fee-based.
  
  

Airport Offerings

• Most airports offer a wealth of dining options for travelers. Any food you purchase after you pass through the security checkpoint is approved to take on the plane. If you have time before your flight, you can eat at the airport and avoid the hassle of bringing food onto the plane. Otherwise, choose foods that are easy to carry onto the plane and eat in a small space without creating a mess. Be considerate of your fellow passengers and avoid foods with strong or offensive smells such as garlic and onions.
  
  

Home Cooking

• Although it takes some effort and advanced planning, bringing food from home can be the least expensive and most nutritious option for travelers. If you have special dietary needs, this option is particularly useful. Sliced fruits and vegetables, sandwiches, granola bars, dried fruit and other finger foods can satisfy your hunger without breaking the bank. Always check the latest updates on airport security regulations to make sure you don't take something that isn't allowed through the checkpoint. For example, beverages generally are not allowed, and must be purchased beyond the security gate.
  
  

Considerations

• The TSA sets strict limits on the amount of liquid or gel that can pass through security, so plan accordingly. A container of ranch dressing or peanut butter can be confiscated if it exceeds the allowable amount. As of 2011, that limit is 3.4 oz. per item. The regulations make exceptions for medical needs such as insulin for a diabetic, or dietary needs such as formula or breast milk for a baby.