Is a backpack to big for a carry-on?

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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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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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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Most airlines allow carry-on luggage that measures up to a maximum of 22 x 14 x 9 inches. In terms of volume, backpacks that are 40-45 liters are good as a carry-on. Anything bigger than that might require you to have it checked in instead.

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Volume: A 45L backpack is the maximum-sized carry on allowed on most US airlines. For international or budget airlines, choose a bag under 40L. If you want to pack ultralight, anything 35L or under can be carried on virtually any airline. Dimensions: The common 45L volume is usually measured as 22 x 14 x 9 inches.

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

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Airline rules allow for one carry on bag and one personal item, unless you're flying on a basic economy fare.

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While most backpacks, purses, and briefcases can pass as personal items, a large camping backpack probably won't fit under the airplane seat. Most airlines publish specific measurements for what counts as a personal item.

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Oversized Carry-Ons Need to Be Checked-in
If your carry-on is oversized (and doesn't physically fit inside the overhead compartments) or you encounter a strict airline employee, they will ask you to check it in at the gate.

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TSA Guidelines for Checkpoint Friendly Bags In a nutshell, the current requirements are as follows: Your laptop bag has a designated laptop-only section that you can lay flat on the X-ray belt. There are no metal snaps, zippers, or buckles inside, underneath, or on top of the laptop-only section.

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It is rare for airlines to weigh your carry on or hand luggage. So long as your bag is not clearly overweight, and you're able to carry it with ease – you shouldn't have any issues with a slightly overweight bag.

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For international or budget airlines, choose a bag under 40L. If you want to pack ultralight, anything 35L or under can be carried on virtually any airline.

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Southwest Airlines' website recommends a personal item that's no larger than 18.5 inches x 8.5 inches x 13.5 inches. Spirit Airlines allows a personal item for all travelers that must not exceed 18 inches x 14 inches x 8 inches, including handles and wheels.

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Carry-on items stored overhead must be 24 by 16 by 10 inches. Personal items for under the seat – including purses, briefcases, cameras, food containers, laptops and backpacks – cannot be larger than 16 1/4 by 13 1/2 by 8 inches.

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While personal item size restrictions vary across airlines, most airlines consider a small backpack, purse, briefcase, or laptop bag to be a personal item. These must always fit under the seat in front of you. Many airlines restrict passengers to one personal item and one carry on bag.

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Most airlines allow passengers to bring on both a carry-on and a personal item like a backpack, laptop bag, purse, briefcase, shopping bag, etc. The general rule of thumb is that your personal item is smaller in dimension than your carry-on bag and it can fit underneath the seat in front of you.

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Depending on the airline and airfare type you purchase, a carry-on duffel bag will count as your one carry-on item and a backpack or purse will be your allotted personal item. If you purchase the most basic fare of some airlines like United or JetBlue, you may have to pay extra for a carry-on item.

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The Top Carry-on Backpacks for 2023
  • Best Overall: Cotopaxi Allpa 35L.
  • Best Budget: ZOMAKE Lightweight Packable Backpack 30L.
  • Best Lightweight: Osprey Farpoint 40.
  • Best for Business: Aer Travel Pack 3.
  • Best for International Travel: Solgaard Lifepack Endeavor (with closet) – Large.


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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.

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Their dimensions also often fall under the maximum carry on requirements for peace of mind when traveling light. We recommend using a 30 liter backpack carry on as its often just the right size for airline bag requirements.

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One MIGHT get away with a 55L backpack, but 40L would be much more reliable. Carry-on limits are defined by total linear inches, typically 45 or fewer, also maximum dimensions particularly length, generally 22 inches. 22 x 13 x 9 is 2574 cu. inches, 42L.

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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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If the dimensions of your backpack do not exceed 18 x 14 x 8 inches (45 x 35 x 20 cm), then it would fit underneath the seat.

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