You can fly with an 8oz bottle of lotion, but only if it is packed in your checked luggage. If you wish to bring it in your carry-on bag, it is prohibited under the TSA’s 3-1-1 liquids rule, which restricts all liquids, gels, and aerosols to containers of 3.4 ounces (100ml) or less. Even if the 8oz bottle is only half-full, TSA agents will confiscate it because the size of the container is what matters, not the amount of product inside. The only exceptions to this rule are for medically necessary liquids (like contact lens solution or prescription creams) or baby formula/breast milk, which must be declared to an officer for separate screening. If your 8oz lotion is an expensive brand you don't want to lose, ensure it goes into your suitcase under the plane. For 2026 travelers, "solid" lotions or lotion sticks are a great alternative, as they are not subject to the 3-1-1 rule and can be carried in any size in your hand luggage.