Is peanut butter considered a liquid when flying?

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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Solid foods, including peanut butter and jelly sandwiches, are allowed in carry-on bags with no quantity limitations or packing requirements.

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Jar of peanut butter
Peanut butter may seem like a safe item since it's food, but the TSA considers it a liquid, so you're restricted to anything less than 3.4oz/100 ml allowed. You can still bring in jars, but it'll have to be less than the allowed limit.

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Yes, toothpaste is considered a liquid when flying and must be within the 3.4oz (100ml) limit for liquids in order to bring it in your carry-on bag. Any amount larger than that must be checked with your luggage.

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10 TSA-Approved Snacks
  • Trail Mix.
  • Beef Jerky.
  • Cheese & Crackers.
  • Veggies & Hummus (under 3.4 oz)
  • Sandwich (use individual packets of mayo or mustard)
  • Nuts.
  • Granola/Protein Bar.
  • Muffins/Baked Goods (no jelly, cream, or custard-filled donuts)


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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.

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What is not allowed on a plane in carry on baggage: the short version
  • Liquids over 3.4 ounces (100ml) or liquids that do not fit in your one permitted liquids bag.
  • Sharp objects.
  • Flammable liquids or other flammable items.
  • Guns.
  • Weapons.
  • Self defense items.
  • Safety razors or straight razors.
  • Swords.


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Foods you can't pack in your carry-on
Think: creamy cheeses, liquid chocolate, liquid coffee, creamy dips and spreads, gravy, honey, hummus, ice cream, jam, jelly, juice, syrup, peanut butter, salad dressing, sauce, salsa, soda, soup and yogurt.

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Pack items that are in containers larger than 3.4 ounces or 100 milliliters in checked baggage. Any liquid, aerosol, gel, cream or paste that alarms during screening will require additional screening.

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In the eyes of TSA, peanut butter — even the crunchy kind — falls under its liquids rule and is allowed in carry-on bags only in amounts 3.4 ounces or less; anything more can go in checked bags.

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Yes, solid food is allowed through TSA security in any amount. If the item is considered a liquid, paste, cream, gel, or aerosol, it is still allowed, but must be smaller than 3.4 ounces. Otherwise, you'll be required to check the item or throw it out.

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