Alcoholic beverages with more than 24% but not more than 70% alcohol are limited in checked bags to 5 liters (1.3 gallons) per passenger and must be in unopened retail packaging. Alcoholic beverages with 24% alcohol or less are not subject to limitations in checked bags.

The rules for bringing 70% alcohol on a plane depend on whether it is in your carry-on or checked luggage, and whether it is for consumption or sanitization. For carry-on luggage, the standard "3-1-1" rule applies: liquids must be in containers of 100ml (3.4 oz) or less. Most hand sanitizers, which often contain 70% alcohol, were granted temporary exemptions for larger sizes during the pandemic, but most airlines have now reverted to the standard 100ml limit. For checked luggage, the FAA and IATA have strict rules regarding high-proof alcohol. Beverages with an alcohol content between 24% and 70% are limited to 5 liters (1.3 gallons) per passenger and must be in their original retail packaging. Anything above 70% alcohol (140 proof), such as certain types of grain alcohol or high-strength rum, is strictly prohibited in both carry-on and checked bags because it is classified as a flammable liquid and a hazardous material. If you are carrying 70% isopropyl (rubbing) alcohol for medical purposes, it is generally allowed in checked bags in reasonable quantities, but always check with your specific airline as some have stricter "dangerous goods" policies than others.