In unopened retail packaging, containing more than 24% but not more than 70% alcohol by volume (up to 140 proof)

Quantity limits: 5 L (1.3 gallons) per packaging and 5 L total per passenger.*

Must be in unopened retail packagings.

Beverages containing more than 70% alcohol (more than 140 proof) are forbidden in carry-on and checked baggage.

See the regulation: 49 CFR 175.10(a)(4)

Tip: Alcoholic beverages containing 24% or less alcohol by volume are not restricted as hazardous materials. This includes beers and most wines.

*Liquids, gels, and aerosols in carry-on baggage are further limited to 100-ml (3.4 oz) containers at the TSA security checkpoint.

FAA regulations prohibit passengers from drinking alcohol on board the aircraft unless it is served by the air carrier.