Powders such as protein mix, baking flour or cosmetics can slow you down at security. The Transportation Security Administration (TSA) has a specific rule about larger amounts. This update follows the TSA's own answer on the subject. The earlier version of this article gave the start date as 2019, but the TSA states 30 June 2018.
The rule
- Powder-based substances in carry-on baggage of more than 12 oz (350 mL) may need additional screening at the central security checkpoint.
- If the officers cannot resolve a powder at the checkpoint, it is not allowed into the aircraft cabin and is thrown away.
- TSA's advice: "place powders in your checked bag" when you do not need them on board.
Who it applies to
TSA says the measure applies to travellers arriving in the United States from an international last point of departure, which means flights from abroad. These checks are already in place at US airports, and TSA states that what is allowed in carry-on bags at US checkpoints has not changed.
How to avoid problems
- Pack large amounts of powder in your checked bag.
- If you must carry powder in the cabin, keep it in a container of 12 oz (350 mL) or less and easy to reach, because it may be taken out of the bag for screening.
- Expect rules at other countries' airports to differ, and check the airline's own advice if you connect abroad.
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