Yes, you are absolutely allowed to bring your own snacks on American Airlines flights, and doing so is often a smart move to save money and ensure you have food you actually enjoy. You can bring solid food items like sandwiches, fruit, nuts, crackers, and granola bars through the TSA security checkpoint and onto the plane. However, the main restriction involves liquids and gels; any "spreadable" or "liquid" snacks like yogurt, hummus, peanut butter, or pudding must follow the 3-1-1 rule (3.4 ounces or less) if they are in your carry-on. Once you are past security, you can purchase larger drinks or soups to bring on board. It is also worth being mindful of your fellow passengers—highly aromatic foods (like tuna or strong onions) can be unpleasant in a pressurized cabin, and it’s always a kind gesture to avoid nut-heavy snacks if an allergy announcement is made by the crew. American Airlines provides complimentary small snacks like pretzels or Biscoff cookies, but for longer flights, having your own stash is highly recommended.