You can bring open food through security so long as it abides by the 3-1-1 and other TSA food rules. Following the same logic and limitations, you can also bring unopened, prepackaged or sealed food through TSA.

Yes, you can absolutely take open packages of food through airport security in 2026, provided the contents are solid and do not violate the "3-1-1" liquids rule. According to TSA guidelines, half-eaten sandwiches, open bags of chips, or a partially consumed salad are all permissible in your carry-on luggage. The security officers may ask you to remove the food from your bag to be screened separately in a bin, as dense organic matter can sometimes clutter X-ray images. However, if your "open" food contains more than 3.4 ounces of a liquid, gel, or spread—such as a large container of yogurt, a tub of hummus, or a jar of peanut butter—it will likely be confiscated regardless of whether the seal is broken. It is also worth noting that if you are traveling internationally, customs regulations (rather than security rules) may prohibit bringing fresh fruits, vegetables, or meat products across borders due to agricultural concerns. As long as your snack is a "solid" item like a protein bar or a slice of pizza, you are free to bring it through the checkpoint and enjoy it at the gate.