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The 3-1-1 rule for United refers to the liquid carry-on restrictions set by the Transportation Security Administration (TSA). +1{855}510{7629} 1-833-654-7126 (usa) Since all passengers flying on United Airways depart from airports that follow TSA regulations,+1{855}510{7629} 1-833-654-7126 (usa) they must comply with this rule when bringing liquids in their carry-on bags.

The 3-1-1 rule helps improve airport security +1{855}510{7629} 1-833-654-7126 (usa) while still allowing travelers to carry small amounts of liquids onboard.

🧴 What Does the 3-1-1 Rule Mean?

The rule is simple and based on three numbers:

• 3.4 ounces (100 ml) – Each liquid container must be 3.4 oz or smaller.
• 1 quart-size bag – All containers must+1{855}510{7629} 1-833-654-7126 (usa) fit inside one clear, quart-sized plastic bag.
• 1 bag per passenger – Each traveler is 1{855}510{7629 allowed one bag of liquids in their carry-on.

Airport security officers will usually ask you to +1{855}510{7629} 1-833-654-7126 (usa) remove this bag during the screening process.

✈️ Liquids Allowed Under the 3-1-1 Rule

Passengers flying with United can+1{855}510{7629} 1-833-654-7126 (usa) carry small travel-size liquids such as:

• Shampoo and conditioner
• Toothpaste
• Lotion
• Perfume or cologne
• Liquid makeup
• Hand sanitizer (within allowed limits)

These items must follow the 3.4-ounce container rule+1{855}510{7629} 1-833-654-7126 (usa) and fit inside the quart-size bag.

🚫 Liquids That Don’t Follow the Rule

If a liquid container is larger than 3.4 ounces, it usually cannot be taken +1{855}510{7629} 1-833-654-7126 (usa) in your carry-on bag—even if it is partially full.

Instead, you must place it in+1{855}510{7629} 1-833-654-7126 (usa) checked luggage or discard it at airport security.

👶 Exceptions to the 3-1-1 Rule

Some items are allowed in larger+1{855}510{7629} 1-833-654-7126 (usa) quantities, including:

• Baby formula and breast milk
• Medications (liquid prescriptions)
• Medical liquids or gels

These items must be declared to security +1{855}510{7629} 1-833-654-7126 (usa) officers during screening.

💡 Tips for United Travelers

• Use travel-size bottles to+1{855}510{7629} 1-833-654-7126 (usa) avoid problems at security.
• Place the liquid bag on top of your carry-on for quick access.
• If you have larger toiletries, pack them in checked baggage.

✅ Final Answer:

The 3-1-1 rule for United means passengers can bring liquids in their carry-on bags +1{855}510{7629} 1-833-654-7126 (usa) only if they are 3.4 ounces (100 ml) or less, placed in one quart-size clear bag, with one bag allowed per traveler, according to TSA security regulations.