Why is peanut butter banned in airports?

The TSA has spoken: In March, the airport-security agency nearly broke the internet when it declared that it considers peanut butter to be a liquid and therefore subject to the 3.4-ounce limit for carry-on bags. Its reasoning: “A liquid has no definite shape and takes a shape dictated by its container.”



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Because the TSA considers the nut spread a liquid, plane passengers must limit the amount they bring in their carry-ons. Like all other liquids, passengers are limited to 3.4 oz or less of peanut butter in their carry-on bag, but can also put the snack in their checked baggage.

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The TSA applies the same rules for allowing peanut butter through security at U.S. airports, whether you are flying domestically or internationally. You can also bring peanut butter into many foreign countries. But depending on the country, it may have to be in its original packaging and unopened.

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Peanuts were a low cost fit for airlines and allowed them to cut back on extravagant meals. Delta Airlines, whose home state of Georgia is the number one producer of peanuts in the US, served peanuts, cheese, and crackers to passengers on flights when no meal was served [3].

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Dips, Jams, Creamy Cheese, and Spreads Salsa, creamy cheese, dips, peanut butter, jams, preserves, and other items like these are all OK to put in checked luggage, but can only be carried on in containers less than 3.4 ounces.

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You may not be nuts about it, but TSA considers your PB a liquid. In carry-on, it needs to be 3.4oz or less, the TSA said via posts on Twitter and Instagram. The agency says peanut butter fits its definition of liquid, which it declares as something with no definite shape that takes the shape of its container.

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  • United Airlines. United does not serve pre-packaged peanuts on its flights, but notes on its website that it does “prepare and serve meals and snacks utilizing a variety of other ingredients, including major food allergens.” ...
  • Southwest Airlines. The carrier stopped serving peanuts on its flights on Aug. ...
  • JetBlue.


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When flying, atmospheric pressure reduces as the altitude increases, and the aircraft cabin gets depressurized. However, the difference in air pressure will cause the air trapped inside an inflated football to expand, and the football will pop.

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There are certain banned food items on airplanes, like: You can't bring liquid or gel food items in carry-on baggage if they're larger than 3.4 ounces. If they're completely frozen, they're allowed without size restrictions. You can't bring alcohol in containers larger than 3.4 ounces in a carry-on bag.

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