Yes. Only small amounts in carry-on: peanut butter counts as a liquid/gel, so each container must be 3.4 oz (100 ml) or less in your quart bag. Larger jars belong in checked bags.
Peanut butter is allowed in containers of 3.4 oz (100 ml) or less, packed in your one quart-size liquids bag.
Larger jars can go in checked bags; TSA directs liquid and gel foods over 3.4 oz there.
Checked against official TSA, FAA and government pages on . These are US rules unless we say otherwise; the TSA officer at the checkpoint makes the final call.
The rules in numbers
- Carry-on: 3.4 oz (100 ml) per container, in one quart-size bag
Packing tips
- Single-serve peanut butter cups or squeeze packs are an easy carry-on workaround.
- A sandwich already spread with peanut butter is solid food and is fine.
- Seal checked jars in a zip-top bag in case the lid loosens.
Outside the US
- CanadaCATSA also classes peanut butter and other spreads as gels: 100 ml or less in carry-on in the 1 L bag; larger containers in checked bags. Source
Flying somewhere else? See the rules for the UK, EU, Canada, Australia, New Zealand, Singapore and Japan.
Questions people ask
Is peanut butter a liquid at TSA?
Yes. TSA treats it as a liquid/gel, so carry-on containers must be 3.4 oz or less.
Can I bring a jar of peanut butter in my checked bag?
Yes. Full-size jars should go in checked luggage.