Domestic airline rules for taking bottles of alcohol on domestic airlines varies slightly from airline to airline. For the most part alcohol can be brought both in carry-on luggage and checked luggage provided it meets the regulation of the airline.
Alcohol that is between 48 and 140 proof may be brought on board an aircraft in carry-on luggage. However, according to the Transportation Security Administration (TSA), the alcohol must be in a container that is three fluid ounces or less otherwise it will be confiscated. Additionally, any alcohol that is personally brought on board an aircraft cannot be consumed.
Alcohol that is between 48 and 140 proof may be placed in checked luggage as long as it is properly sealed and will not spill or break. Most airlines require glass bottles to be enclosed in a Styrofoam-type container that is specifically molded to the shape of the bottle and will completely enclose and protect the bottle from breaking. If alcohol is 48 proof and below there is no limit to the amount that can be checked per person. However, if alcohol is 48 to 140 proof only five liters per person is permitted to be brought in checked luggage.
Any alcoholic beverage that has a proof above 140 is not permitted on the aircraft, this includes both in carry-on baggage and in checked baggage. Alcohol that is above 140 proof is considered a hazardous and dangerous material that is strictly prohibited by all airlines.
