Travelers can bring hair spray on planes, but must follow strict rules: carry-on containers must be 3.4 ounces (100 ml) or less and fit in a quart-sized bag, while checked luggage allows larger cans up to 18 ounces (500 ml), with a total aerosol limit of 70 ounces (2 liters) per person. Always secure the cap, pack carefully to prevent leaks, and check airline or international regulations for additional restrictions. If in doubt, buy hair spray at your destination or after passing security.
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