Yes, you can absolutely bring your own snacks on United Airlines, and in 2026, it is a recommended "pro-tip" for those flying in Basic Economy. TSA rules allow almost any solid food through security, including sandwiches, fruit, nuts, chips, and even pizza. The only restriction is the 3-1-1 rule for liquids and gels, which applies to items like yogurt, peanut butter, hummus, or salsa—these must be in containers of 3.4 ounces (100ml) or less. United is generally very accommodating of "cabin picnics," provided your food isn't overly pungent (avoiding tuna or heavy garlic is standard peer-to-peer etiquette). It is important to note that while you can bring food, you cannot drink your own alcohol onboard; FAA regulations strictly require that any alcohol consumed on a flight must be served by the airline crew. Additionally, if you are traveling internationally, be sure to finish or discard any fresh fruits, vegetables, or meats before landing to avoid heavy fines from customs and border protection agencies at your destination.