Does my carry-on have to fit under the seat?

While individual airlines have varying size and weight restrictions for carry-on, in general a carry-on bag must weigh less than 35 pounds and have dimensions no larger than 10” x 16” x 24”. Personal items must fit under the seat in front of you, which will not accommodate the average carry-on bag.



In 2026, the answer depends on your boarding group and the type of bag. A standard "Carry-On" (typically 22" x 14" x 9") is designed to go in the overhead bin; it is physically too large to fit under the seat in front of you. However, a "Personal Item" (like a backpack, purse, or laptop bag) must be able to fit under the seat. If you are flying on a "Basic Economy" ticket in 2026, many airlines (like United or JetBlue) restrict you only to a personal item that fits under the seat; if you bring a larger bag that requires overhead space, you will be charged a "gate-handling fee" of up to $65. On a full flight, if the overhead bins are at capacity, gate agents may require you to "gate-check" your larger carry-on for free. Therefore, while your personal item must fit under the seat, your primary carry-on does not—but you must ensure it meets the airline's dimensions so it can safely stay in the bin above your head.

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Most Airlines Don't Care if Your Carry-On Is 1 Inch Too Big. Carry-ons are measured at the airport before boarding the plane. It's done with metal measuring boxes just in the right size for the allowed carry-on dimensions. If your bag is too large and it isn't flexible, you won't be able to fit it inside.

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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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American Airlines will charge a checked bag fee for oversized carry-on, which costs between $30 to $200 depending on your destination and how many bags you have already checked. You can substitute a soft-sided garment bag for a standard carry-on bag if you prefer.

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? Flight Approved Carry on Backpack: Size of travel backpack: 20.47 x 12.99 x 8.66 . Capacity: 35L. This luggage backpack is meet the allowed maximum size of most IATA flights and also fits in the overhead compartment and the underseat in flight.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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In general, your personal item should be smaller than your carry-on and under the specific airline's carry-on dimensions, allowing it to fit under the seat in front of you. In most cases, backpacks are considered personal items as long as they fit under the seat in front of you.

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Can a 24 inch luggage be a carry on? Unfortunately no, the standard carry-on size is typically 22” x 14” x 9”, so a 24 inch bag is too large to bring on board of most economy standard airlines.

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A personal item is a smaller bag that typically fits under the seat in front of you, such as a purse, briefcase or small backpack. A carry-on item is a larger bag that can be stowed in the overhead bin, like a suitcase or duffel bag.

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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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Can you put clothes in your personal items? Certainly, you can pack clothes in your personal items or carry-on bag. But for a better experience, we recommend packing most of your clothes in your carry on and leaving extra space in your personal items.

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The TSA's liquid limit for carry-ons—known as the 3-1-1 rule—allows travelers to pack liquids, aerosols, gels, creams, and pastes under 3.4 ounces (100 milliliters) in their carry-on bags. Passengers are allowed up to one quart-sized bag per person, or roughly nine 3.4-ounce containers in a single quart-sized bag.

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Think the usuals, like shampoo, toothpaste, and aerosol or roll-on liquid deodorant (solid deodorant isn't regulated by the 3-1-1 rule). But here are some surprising items that the TSA prohibits in carry-on luggage.

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Yes. The usual maximum dimensions for carry-on luggage are 9 inches x 14 inches x 22 inches (22 centimeters x 35 centimeters x 56 centimeters). This is 43.12L, so your 50L backpack is about 16% too big. You might get away with it because the gate staff often doesn't (have the time to) check the bag sizes in all detail.

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As a general rule of thumb, anything smaller than the dimensions of a carry-on can be considered a personal item. However, every airline has different restrictions for size. In most cases, your backpack should be no more than 18 x 14 x 8 inches.

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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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Each passenger is limited to one quart-size bag of liquids, gels and aerosols. Common travel items that must comply with the 3-1-1 liquids rule include toothpaste, shampoo, conditioner, mouthwash and lotion.

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American Airlines (AA) allows 1 carry-on bag and 1 personal item (purse, briefcase, laptop bag) per passenger fee free. Carry-on should not exceed the following size and weight restrictions: 45 linear inches (22 x 14 x 9 in) or 115 centimeters (56 x 36 x 23 cm) including handles and wheels.

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Each passenger is limited to one quart-size bag of liquids, gels and aerosols. Common travel items that must comply with the 3-1-1 liquids rule include toothpaste, shampoo, conditioner, mouthwash and lotion.

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