You can bring food through airport security, but there are important rules to keep in mind. Solid foods like sandwiches, slices of pizza, nuts, dried fruits, bread, cookies, cooked meat, solid cheese, and protein bars can generally be carried in your carry-on luggage without restrictions. However, foods that are liquids, gels, or spreads — such as yogurt, soup, sauces, jams, nut butters, and dips — must comply with the 3-1-1 liquids rule: containers must be 100 ml (3.4 oz) or less and fit in a single quart-sized resealable bag. Larger containers of these liquid or gel-like foods are not allowed through security in carry-on bags but can be packed in checked luggage. There are also exceptions for baby food, formula, and medically necessary items. Some international destinations may have restrictions on fresh produce, meats, and dairy because of customs regulations, so it’s worth checking those before you travel. It's best to pack food items in an accessible place in your bag, as security may need to inspect them more closely.

In summary:

• Solid foods are generally allowed in carry-on bags.
• Liquid, gel, and spreadable foods are limited to small quantities under the liquids rule.
• Baby food, formula, and medical necessities have special exemptions.
• International travel may have additional restrictions on certain foods.
• Pack food accessibly for easy inspection at security.

This guidance helps travelers bring snacks and meals through airport security efficiently and avoid confiscation or delays.