Airport snack rules are simple in theory but easy to miss in practice, especially because the Transportation Security Administration treats some foods as liquids. That matters for travelers across the U.S., where items like peanut butter, yogurt and dips are more likely to cause delays at TSA checkpoints.
The foods that cause the most issues
The TSA says solid food items can go in either carry-on bags or checked bags, but liquids, gels and aerosols in carry-ons are limited to 3.4 ounces, or 100 milliliters, per container. In guidance the agency posted in March 2024, it specifically highlighted peanut butter as an item that counts as a liquid at the checkpoint.
That same rule can affect yogurt, pudding, creamy cheese, hummus, salsa, jam, jelly and other spreadable foods, according to TSA screening guidance. If any of those items are over 3.4 ounces in a carry-on, officers can require travelers to throw them away, move them to a checked bag, or leave them behind before screening is complete.
The issue is texture, not whether a food sounds like a snack. TSA has said that if a food can be spilled, spread, sprayed, pumped or poured, it is more likely to be treated as a liquid, which puts it under the 3-1-1 rule used at airports nationwide.
What travelers will notice at U.S. airports
At airports from New York’s JFK to Los Angeles International, the same federal screening standard applies because TSA runs checkpoint screening nationwide. The agency has not released a state-by-state count of how many snack items are surrendered, so there is no public list showing which airports see the most food confiscations.
What is confirmed is that solid snacks like crackers, chips, granola bars, nuts, cookies and sandwiches are generally allowed in carry-ons, according to TSA. Fresh fruit, vegetables and baked goods can also clear security in many cases, though TSA says officers make the final call on every item at the checkpoint.
That means two snacks from the same grocery run can be treated very differently. A sealed bag of pretzels will usually pass, while a 6-ounce cup of yogurt or a full-size container of hummus can be stopped under the same 3.4-ounce rule that applies to shampoo and toothpaste.
Why the rule exists and what it means before a flight
The food confusion comes from a security framework that does not sort items by meal category. Instead, TSA screening is based on whether an item fits the agency’s definition of a liquid, gel or aerosol, a standard travelers have dealt with since the 3-1-1 carry-on rule took effect in the United States in 2006.
For customers, the practical takeaway is straightforward. Snacks that are fully solid are usually the safer bet in a carry-on, while dips, spreads and cups of dairy are more likely to cause a problem if they are over 3.4 ounces, according to TSA.
TSA also states that officers have final discretion during screening, even when an item appears to fit published guidance. The agency continues to direct travelers to separate foods from bags when asked at the checkpoint, and its published rules still distinguish sharply between solids and spreadable snacks in 2024.
