Yes, you are permitted to carry a 100 ml (3.4 oz) bottle of perfume in your hand luggage, provided it adheres to the standard international "3-1-1" rule for liquids. Specifically, the container itself must have a maximum capacity of 100 ml; you cannot bring a larger 200 ml bottle that is only half-full. Furthermore, the perfume bottle must be placed inside a single, clear, quart-sized (one-liter) resealable plastic bag along with any other liquids, gels, or aerosols you are carrying. In 2026, while many airports are installing advanced CT scanners that allow passengers to leave liquids in their bags, the 100 ml limit per container remains the standard for most security checkpoints globally. If you have an expensive or rare perfume, it is always wise to ensure the bottle is well-protected within your liquid bag to prevent breakage. Remember that anything exceeding 100 ml will be confiscated at the security gate, so if you have a larger bottle, it must be packed in your checked suitcase.