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Can you bring deodorant on a plane? Deodorant is typically allowed in both carry-on and checked baggage when traveling by air. Deodorants in solid or gel form are permitted in carry-on luggage, according to TSA regulations. There are a few crucial considerations to bear in mind, though There are no specific size restrictions if you're carrying a solid deodorant stick. If you use a liquid or gel deodorant, it must adhere to the 3-1-1 liquids rule.