Do airlines care about dimensions?

Airlines publish the maximum dimensions allowed for carry-on bags. For example, American Airlines states that a carry-on bag's dimensions cannot exceed 22 by 14 by 9 inches, including handles and wheels. The carry-on must also fit into the sizer at the airport; if it doesn't, you'll be required to check it.



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The most common maximum size bag allowed is 62 linear (total) inches. A common size bag for checking through is: 27 x 21 x 14. Airline carriers will allow overweight, oversize or additional baggage for additional fees.

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If your carry-on is too big, you will either have to pay penalty fees or check your luggage. Checking your luggage means that your carry-on won't be traveling with you but will instead be sent to the airplane cargo, and you will be able to claim it once the plane lands.

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Unless your carry-on is extremely large, the airline employees at the gate most likely won't ask to measure it. If they'd ask each passenger to measure their carry-on, the boarding would take too long. This could cause delayed flights, which airlines don't want.

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If your carry-on is 1-2 inches over the size limit, don't stress about it too much. Most likely, you'll be allowed to pass through without anyone saying anything. But be prepared that if you encounter a strict airline employee, you might have to check it in.

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For example, if your bag is 24 inches tall, 20 inches long and 18 inches wide, its total linear length is 62 inches.

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Most airlines seem to have a 62 linear limit (L x W x D) on checked luggage before incurring additional fees. Suitcases seem to be sold in 20, 24, and 28 sizes. The 28 bag comes the closest to the 62 limit but almost every 28 bag I've looked at had linear measurements of between 64-65.

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For example, if an extra piece of baggage exceeds the weight and size limits, it will be subject to three fees: one for the extra bag, one for exceeding the weight limit and one for going over the size restriction. Fees are charged for each additional bag, each way.

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If your checked bag is over 62 linear inches (157 cm), it will be marked as oversized. This is a rule set by airline regulators to protect baggage handlers from any potential injuries. You'll need to pay a hefty fee for oversized baggage, which usually ranges between 75-200$.

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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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Checked Luggage Most airlines will allow you to check one bag and have one carry-on bag. There is normally a maximum weight limit of 50 pounds per checked bag as well as a size restriction. The most common maximum size bag allowed is 62 linear (total) inches. A common size bag for checking through is: 27 x 21 x 14.

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A medium checked suitcase (25-27 inches) is more than enough for most people. Usually, medium checked suitcases are 58-61 linear inches in size, which is just below the 62 linear inch size limit, so when you're looking for a checked suitcase, get one in this size.

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What does this mean? The linear dimensions, or total linear length, of your luggage are the sum total of the length, width, and height of your suitcase. This number may not exceed the Maximum Linear Dimensions allowed by your airline, typically 62 inches (158cm) for most airlines.

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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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For most airlines, the largest luggage size for check-in is 62 linear inches. This means the total length + width + depth must equal 62 inches or less. RELATED: Our luggage size guide takes the guesswork out of measuring your bags before you get on the plane.

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Can I take a 22.5 inch carry-on bag? 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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A personal item is any type of luggage that fits underneath the plane seat in front of you. Most domestic airlines in the United States require a personal item to be 18” x 14” x 8” or smaller in size. Personal items can include a purse, briefcase, small backpack, laptop bag, weekender or small duffel bag.

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The good news is that, yes, a 24-inch luggage can be a carry-on as long as it meets the size restrictions set by the airline you are flying with. Most airlines have similar size restrictions for carry-on luggage, with the maximum dimensions being 22 inches x 14 inches x 9 inches.

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