Yes, you can take a cooked pizza through a TSA checkpoint, as it is classified as a solid food item. According to TSA guidelines in 2026, solid food items (including pizza, sandwiches, and dry snacks) are permitted in both carry-on and checked luggage. The pizza can be whole or in slices, and it can be cold or room temperature. However, there is a catch: if your pizza has excessive amounts of "liquid-like" toppings, such as a heavy layer of honey, a very wet sauce, or a side container of dipping sauce (like garlic butter or ranch), those specific components must be 3.4 ounces (100ml) or less and fit in your quart-sized liquids bag. When passing through security, the TSA recommends placing the pizza box in its own bin to prevent it from cluttering the X-ray image of your other belongings. Note that while the TSA allows it, your airline's "personal item" or "carry-on" size limits still apply, so don't bring a "giant" party-sized box if it won't fit under the seat in front of you.