[size= medium]Many travelers ask [/size]<strong style="font-size: medium;" data-start="287" data-end="395">is nail polish allowed on planes[size= medium] before packing their beauty essentials. The Transportation Security Administration (TSA) permits nail polish on flights, but it must comply with liquid and safety regulations. Nail polish is considered a liquid and contains flammable substances, which means carry-on bottles must be 3.4 oz (100 ml) or less and placed in a clear, quart-size liquids bag. Larger quantities are typically allowed in checked baggage if packed securely. Understanding these rules in advance helps passengers avoid security delays, confiscation, or accidental spills during travel.[/size]