• A carry-on bag must fit under your seat or in the overhead bin.
• Carry-on bag dimensions should not be more than 9" x 14" x 22" (length + width + height) or 45 linear inches (the length, height and width added together).
  

United may require that a carry-on item travel as checked baggage if the item cannot be safely stowed on a particular flight.

United exempts the following personal items from the one piece limit:

• Child safety seats for ticketed children
• Assistive devices (e.g. canes, crutches, etc.)
• Outer garments (e.g. coats, hats, etc.)

Carry-on baggage restrictions for flights from/within the U.S., the European Union and Japan

Liquids, gels and/or aerosols are permitted through security checkpoints. Items must fit in one clear, re-sealable quart or liter-sized plastic bag, in containers of 3 oz/100 ml or less. In the European Union, items must fit in one clear, re-sealable liter-sized plastic bag, in containers of 100 ml/3 oz or less. (Please note: The TSA's exact measurements are stated above. But for ease of memory please follow the 3-1-1 rule.)

Plastic bags must be completely sealed and will be x-rayed at the security checkpoint separately.

The following items are allowed, but must be presented to officials at security checkpoints if they are not contained in clear plastic bags or are of greater volume than 3 oz/100 ml in the U.S. and Japan or 100 ml/3 oz in the EU:

• Baby formula/milk, including breast milk, and baby food in containers. A baby or small child does not have to be traveling with the parent.
• Medications (liquid, gel or aerosol)
• Liquids, juices or gels for diabetic passengers who indicate a need for such items to address their medical condition. (A letter from your physician is not necessary).

Passengers are permitted to take liquids, gels, and/or aerosols purchased in the boarding area onboard the aircraft. This includes all duty free items.

Though there is some flexibility regarding duty free items within the EU, restrictions still apply elsewhere. Duty free liquids, gels, and/or aerosols that exceed the TSA limit will not be permitted on most connection flights worldwide.

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Carry-on baggage restrictions for flights departing other locations

Security checkpoint procedures vary outside the U.S. Passengers on non-U.S. departure flights should check with a United representative at the departure airport while checking in and before entering the security checkpoint.

Connecting flights within the U.S.

Duty free liquids, gels and/or aerosols are not accepted on connecting flights within the U.S, unless they meet U.S. domestic carry-on criteria.

Additional information
For more carry-on guidelines, visit the TSA's website at www.tsa.gov.

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