Yes, you can bring a peanut butter and jelly sandwich through a TSA checkpoint in 2026, but there is a specific catch regarding how it is prepared. According to the "3-1-1" liquids rule, peanut butter and jelly are both classified as "spreadables," which the TSA treats as liquids or gels because they can be smeared or poured. If you have a separate jar of peanut butter or jelly, it must be 3.4 ounces (100ml) or less. However, once these ingredients are spread onto bread and assembled into a sandwich, the TSA generally classifies the item as a solid food. You do not need to put the sandwich in your liquids bag; you can simply leave it in your carry-on or personal item. The only time you might face an issue is if the sandwich is "excessively goopy" or contains large amounts of liquid-like condiments that a strict officer might flag. To ensure a smooth experience, wrap your sandwich tightly in foil or plastic wrap. It is a popular travel hack for 2026 travelers looking to avoid high airport food prices while still adhering to security protocols.