Is United strict on carry-on size?

United Airlines Carry-on Size Restrictions. Carry-on luggage for a United Airlines flight must be no larger than 9 inches X 14 inches X 22 inches (22 cm X 35 cm X 56 cm). When measuring, remember these dimensions include the luggage's wheels and handles.



Yes, United Airlines has become significantly stricter with carry-on enforcement in 2026, particularly for those on Basic Economy fares. If you book Basic Economy on a domestic flight, you are not allowed any overhead bin space; you are restricted to one "personal item" that must fit under the seat. If you attempt to bring a full-sized carry-on to the gate, United will charge you the standard checked bag fee plus a $25 gate-handling surcharge. For standard Economy and higher, the limit is 22 x 14 x 9 inches, including wheels and handles. United has begun deploying "High-Fidelity" automated scanners and AI-powered gate cameras that can flag oversized bags before you even reach the agent. If your bag is visibly overstuffed or doesn't fit the metal sizer, you will be forced to gate-check it. To avoid fees, travelers are encouraged to measure their bags from the floor to the top of the handle, as many "carry-on" bags sold in stores exceed these strict limits once fully packed.

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Your bag will have to fit into the sizer for it to be approved as a carry-on. Having a flexible fabric bag is advantageous in this situation because you'll be able to squeeze it in even if it's slightly oversized. Usually, many airlines won't check every carry-on but will instead go for ones that look oversized.

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What size should your carry-on luggage be? On domestic flights within the United States, a carry-on bag that's smaller than 22 x 14 x 9 inches (45 linear inches), including handles and wheels will meet the size restrictions of all major airlines, such as United Airlines and Alaska Airlines.

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The United Airlines carry-on allowance permits you to bring one cabin bag at 9 x 14 x 22 inches (22 x 35 x 56 cm), plus one personal item with maximum total dimensions of 9 x 10 x 17 inches (22 x 25 x 43 cm).

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Usually, many airlines won't check every carry-on but will instead go for ones that look oversized. If your luggage does not fit in the sizer, you might have to pay a checked bag fee along with the gate checking fee and have your bag transferred to the airplane's cargo.

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Most airlines allow backpacks as carry-ons, but size and weight restrictions vary depending on the carrier. Typically, the bag must be within the cabin baggage dimensions of around 22 x 14 x 9 inches (56 x 36 x 22 cm), commonly considered the standard size for carry-on.

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How strict are the airlines about luggage dimensions? Carryon dimensions are limited to the size of the overhead bin. In those cases dimensions are strict. Anything too big gets gate checked.

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Each passenger may carry liquids, gels and aerosols in travel-size containers that are 3.4 ounces or100 milliliters. Each passenger is limited to one quart-size bag of liquids, gels and aerosols.

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In general, standard domestic carry-on luggage size is 22 x 14 x 9 inches. If you're flying internationally, that may vary a little to 21.5 x 15.5 x 9 inches. Remember, those dimensions include the handle, wheels and anything else that may protrude from your suitcase so don't miss them from your measurements.

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Measuring the size of your luggage isn't tricky. Most airlines require that your bag be 62 linear inches or less. Therefore, your bag's length, width and height cannot exceed 62 inches. This measurement includes the wheels and the handle of your luggage.

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To calculate the size of your carry-on bag, measure the length, height, and depth (or width) of your bag. You can add the three numbers together to find the total linear inches. For example, a bag with a length of 20 inches, width of 12 inches, and depth of 6 inches would be 20+12+6 = 38 linear inches.

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If the baggage size, be it check in bag or cabin bag, is higher than usual, you may need to pay additional sum if required. If the baggage is too big or too heavy, the airline may send it separately by cargo plane. You may need to pay additional sum if required.

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United Airlines Carry-On Baggage One full-sized carry-on bag 9 inches x 14 inches x 22 inches (22 cm x 35 cm x 56 cm) plus one personal item 9 inches x 10 inches x 17 inches (22 cm x 25 cm x 43 cm). If you are travelling on a Basic Economy ticket, your personal item will be the only item you can bring on board.

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United's bag policy for basic economy tickets will continue to allow only a personal item. The airline polices this by restricting check-in options for basic economy travelers, something American did not do when it had a carry-on bag ban.

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The maximum size of a checked bag can be 30 in x 20 in x 12 in (76 cm x 52 cm x 30 cm), including handles and wheels. Other fees apply for extra checked bags or any bags that go over these limits. Visit the oversized, overweight and extra bags section below for more info.

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Is toothpaste considered a liquid by the TSA? Yes, toothpaste must adhere to the 3-1-1 rule for liquids and gels. Toothpaste can be brought through TSA security in your carry-on as long as it is 3.4 ounces (100 milliliters) or less and placed in a 1-quart bag.

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Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage.

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Disposable razors, replacement blades, and electric razors can go in either your carry-on or checked baggage; if you have a safety or straight razor, you can pack it in your carry-on — but you must remove the blades first and pack them in one of your checked bags.

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American, Delta, and United Airlines have all recently reduced the size of bags permitted as carry-on luggage. Previously, the industry standard measured 22in x 15in x 9in. Now, those dimensions run 22in x 14in x 9in. That is a change of 1 inch in width.

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If your backpack doesn't fit, you may be asked to check it at the gate.

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