Some airlines have strict size restrictions for carry-on luggage, so it’s important to check before you travel. A 40L backpack may be too big to meet the requirements, but it depends on the particular airline. If you’re unsure, it’s always best to err on the side of caution and check with the airline beforehand.

A 40L backpack is a bit too large to be considered a carry-on bag by most airlines. Each airline has their own specific size requirements for carry-on luggage, but most are between 22-26 inches in total dimension. A 40L backpack would likely need to be gate checked.

What is the biggest backpack you can carry-on an airplane?

Most airlines allow bags up to 45 linear inches (length + width + depth) or 22″ long, 14″ wide, and 9″ deep. To prevent problems at the airport, your bag should be no larger than these dimensions.

Carry-on bags shouldn’t be larger than 22 inches long, 14 inches wide and 9 inches high including handles and wheels. Dimensions of personal items should not exceed 18 inches long, 14 inches wide and 8 inches high.

Will a 45L backpack fit as a carry-on

Most US airlines allow a maximum carry-on size of 45L, which is usually 22 x 14 x 9 inches. 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.

As of 2021, all passengers are allowed to bring one small personal bag on Ryanair flights free of charge. This bag must be no bigger than 20x25x40cm (8x10x16 inches) in order to fit under the seat in front of you.

Can a 40L backpack be a personal item?

Approved personal items that can be carried on board an aircraft include a purse, briefcase, small backpack, camera bag, diaper bag, laptop bag, or other similarly sized item. The combined length, width, and height of carry-on baggage should not exceed 45 inches. Each individual item must be less than 22 inches by 14 inches by 9 inches.

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Most airlines allow passengers to bring one personal item and one carry-on bag on board. However, 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.Is a 40L backpack too big for carry-on_1

Can I use a large backpack as a carry-on?

Most airlines will allow a backpack as a personal item, and for those that don’t, a backpack can be your carry on luggage as long as it is under the size restrictions for the particular airline. The standard domestic carry-on luggage size is 22″ x 14″ x 9.

If you are planning to bring a carry-on bag with you on a flight, it is important to make sure that the bag is not too large. If the bag is too large, you will not be able to bring it on the plane and will instead have to pay to check it at the gate. Even if your carry-on bag is not too large, there is always a chance that it will need to be gate-checked (free of charge) due to limited storage in the overhead bin.

Can my carry-on be slightly bigger

Your carry-on luggage should be small enough to fit in the overhead bin on an airplane. The dimensions of your carry-on bag should be no more than 22 x 14 x 9 inches, including handles and wheels. This size restriction is applicable to all major airlines operating within the United States, such as United Airlines and Alaska Airlines.

Most 40L or 45L duffel bags are small enough to be used as carry-ons, as long as they are soft and can be squished into the right shape. If you want to use a duffel as an under-the-seat bag, make sure it is very soft and squishable.

How much can you fit in a 40L backpack?

A standard 40L backpack is big enough to carry everything you need for a weekend backpacking trip. This includes a backpacking sleeping bag, small tent, and pad, as well as extra clothing and layers. Other things you’ll need to carry include a small stove, food and basic cookware, plus a water filter/purifier, first aid kit, and navigation tools.

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The Allpa 35L backpack is a great option for those looking for a backpack that will fit under standard airline seats. However, you may end up resting your feet on it a tad.

How strict is Ryanair with backpack

If you are flying with Ryanair, be aware that they have strict limits on the size and dimensions of carry-on baggage. Your personal item must be no larger than 40cm x 25cm x 20cm in order to fit in the sizer and be stored underneath the seat in front of you.

A small cabin suitcase, also called the hand luggage, usually measures 48 cm or 18 inches in height. The capacity of the hand luggage is maximum 40 litres. You can use a small cabin bag on pretty much all airlines.

How do you pack a 40l backpack for travel?

The next thing I need is my sleeping mat. I also need to flip it horizontally along the bottom in front of the sleeping bag.

If you’re looking for a backpack that will fit most carry-on allowances for airlines, the 40L backpack is a great option. It’s large enough to hold enough clothing and other items for 1-2 weeks of travel, making it perfect for shorter trips.Is a 40L backpack too big for carry-on_2

Can I bring two backpacks as a carry-on and personal item

It’s important to be respectful of the airline rules when it comes to bringing luggage on the plane. This includes only bringing one carry on bag and one personal item unless you’re flying on a basic economy fare. Putting two bags in the overhead bin or carrying on more luggage than allowed can be seen as selfish and disrespectful.

We’ve found that most airlines aren’t too strict about the exact size of carry on luggage. In over 12 years we’ve never had our bags measured, although our luggage has been a little over the size restrictions of some airlines such as Ryanair.


There is no definitive answer to this question as it depends on the airline you are flying with and their specific restrictions on carry-on luggage size. However, many airlines have a maximum size limit for carry-on bags of 22″ x 14″ x 9″, which would make a 40L backpack too big to bring on board as carry-on luggage.

A 40L backpack is too large to be considered a carry-on for most airlines. However, there are a few airlines that allow you to bring a larger bag as a carry-on. Be sure to check with your airline before you travel to avoid any issues.