You're limited to 5 liters of alcohol between 24%-70% ABV or 48 – 140 proof. If you purchased the alcohol overseas and have a connecting flight in the United States, the alcohol is allowed in your carry-on bag if; The bottles are packed in a transparent, secure, tamper-evident bag by the retailer.
You can pack as much alcohol as you like if contains less than 24 percent alcohol – think wine and beer. If your bottles have between 24 and 70 percent alcohol content, you can pack as much as 5 liters (1.3 gallons) in your checked bags, as long as the bottles you're using can be sealed.
Generally, one liter of alcohol per person may be entered into United States duty-free by travelers who are 21 years or older. Although travelers coming from the U.S. Virgin Islands or other Caribbean countries are entitled to more.