For all alcoholic beverages:

• When placed in checked baggage, glass bottles must be in a Styrofoam-type insert that is molded to the shape of the bottle and completely encloses the bottle
• Customs regulations outside the U.S. may have additional alcohol transport restrictions

Proofs of alcohol vary. The guidelines for the varied proofs of alcohol are as followed: 

Alcoholic beverages – less than 24 percent by volume (48 proof)  

• Includes most beer and wine
• No limit on amount that can be accepted
  

Alcoholic beverages – 24 to 70 percent by volume (48 - 140 proof)

• Covers most alcoholic beverages
• Limited to 5 liters (1.3 gallons) per passenger
  

Alcoholic beverages more than 70 percent by volume (140 proof) are not permitted onboard the aircraft.

Carry-on guidelines 

Until further notice, TSA restrictions for carry-on baggage still apply.