What Is the 3-1-1 Liquid Rule for Air Travel Carry-Ons?

Learn about the 3-1-1 liquid rule for carry-on bags: container size limits, bag requirements, and how to pack liquids for air travel.

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The 3-1-1 liquid rule allows you to carry liquids, gels, and aerosols in your carry-on bag as long as each container is 3.4 ounces (100 milliliters) or smaller. All containers must fit in one quart-sized, clear, resealable plastic bag. Each passenger is allowed one bag.

FAQs & Answers

  1. What does the 3-1-1 liquid rule mean for travelers? The 3-1-1 rule means each liquid container in your carry-on must be 3.4 ounces (100 milliliters) or less, all containers must fit in one quart-sized clear plastic bag, and each passenger is allowed only one such bag.
  2. Can I carry liquids larger than 3.4 ounces in my carry-on? No, liquids larger than 3.4 ounces are not permitted in carry-ons unless medically necessary, and they must be declared separately to TSA.
  3. Are all liquids subject to the 3-1-1 rule? Yes, the rule applies to liquids, gels, and aerosols carried in your carry-on bag during the flight.
  4. What type of bag should be used for carrying liquids under the 3-1-1 rule? Liquids must be packed in one clear, quart-sized, resealable plastic bag per passenger.

Watch More

For more information on airport security regulations and travel packing tips, check out our guides on TSA rules, prohibited items, and how to speed through security checkpoints.

  1. What Is the 3-1-1 Rule at Airport Security? Explained for Travelers Learn the 3-1-1 rule for airport security: liquids in 3.4 oz containers, one quart-sized bag per person for faster screening.
  2. Understanding the 3-1-1 Rule for Food and Travel Learn the 3-1-1 rule for carrying food and liquids on flights to ensure hassle-free air travel.
  3. What Is the 3 Liquid Rule for Air Travel and How Does It Work? Learn about the 3 liquid rule for air travel: restrictions on carrying liquids in hand luggage for a smoother security process.