Airport Security Backpack Size Limits: What You Need To Know

what size backpack can i bring through airport security

The size of your backpack and the airline you're travelling with will determine whether it's considered a carry-on item. Most domestic airlines allow fully packed backpacks of up to 50-55 litres, but it's important to check your airline's size restrictions. Some budget airlines only allow a smaller personal item that fits under the seat, which may include a purse, laptop bag, or item of a similar size. Carry-on luggage that goes in the overhead bin is typically restricted to a maximum size of 22 x 14 x 9 inches, including wheels and handles, but this can vary by airline. Weight restrictions also vary by airline, with some specifying a maximum weight of 15 pounds for carry-on bags.

Characteristics Values
Carry-on allowance Determined by the airline
Carry-on bag size Generally, 22 x 14 x 9 inches (56 x 36 x 23 cm)
Carry-on weight Depends on the airline; generally under 15 pounds
Personal item size Under the seat: 16 1/4 x 13 1/2 x 8 inches; Overhead bin: 24 x 16 x 10 inches
Weight restrictions Generally under 50 pounds

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Carry-on luggage styles and sizes

When it comes to carry-on luggage, there is a range of styles and sizes that you can bring through airport security. The specific allowances depend on the individual airline and fare type. For example, some basic economy tickets only permit a personal item, such as a purse, rather than a full carry-on bag.

Generally, most airlines implement a maximum size policy of 22 inches by 14 inches by 9 inches (or 56 by 36 by 23 centimetres), including any wheels and handles. This is considered the standard size for carry-on luggage. However, it is always best to check with your airline, as some may have different size restrictions. For instance, American Airlines and Emirates have a size limit of 22 by 14 by 9 inches, while Southwest Airlines allows carry-ons up to 24 by 16 by 10 inches, and Emirates allows bags up to 22 by 15 by 8 inches.

In addition to size restrictions, some airlines also enforce weight limits for carry-on luggage. While most domestic airlines do not have weight restrictions, some international carriers specify weight requirements. For example, Emirates restricts carry-on bags to 15 pounds, while Singapore Airlines allows bags up to 15 pounds with a combined length, width, and height of up to 45 inches.

It is important to note that certain items, such as liquids, gels, and electronics, have specific regulations. Liquids and gels must be in containers no larger than 3.4 ounces or 100 millilitres, and they must fit into a 1-quart-sized bag. Electronics larger than a cell phone, like laptops and tablets, should be placed in a separate bin for X-ray screening.

To ensure a smooth airport experience, it is recommended to check your airline's specific rules and regulations for carry-on luggage. By planning ahead and packing accordingly, you can avoid any issues at airport security.

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Weight restrictions

While the Transportation Security Administration (TSA) sets regulations on what you can bring into the airport, it's the airline that determines the size of the items you can bring onboard. Most airlines focus on the dimensions of carry-on luggage rather than weight, but some will weigh your bag if they indicate a limit on their website.

The general weight limit for carry-on luggage on US airlines is around 25 to 35 lbs, but it's always smart to double-check with your specific airline. This is especially true if you're travelling internationally, as many non-US-based airlines have strict weight limits that are much lower than US airlines. Some airlines may charge a fee if your bag is overweight and needs to be checked.

When it comes to the weight of your bag, you'll want to ensure you can comfortably lift your carry-on up and into the overhead compartment efficiently. However, some airlines—particularly budget carriers—limit how much a bag can weigh.

Different airlines have different rules regarding luggage sizes. For example, American Airlines and Frontier both prohibit personal items larger than 18 x 14 x 8 inches. Your baggage allowance could also depend on your ticket type. Some basic economy tickets only allow for a personal item, such as a purse, rather than a piece of carry-on luggage.

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Budget airlines and their rules

Budget airlines offer a great opportunity to travel cheaply, but they often have strict rules regarding hand luggage and additional costs for checked luggage. Each airline has its own unique set of rules, so it is important to be aware of these before travelling to avoid unexpected fees.

EasyJet

EasyJet is a budget airline with strict hand luggage policies. They allow one personal item, a "small cabin bag", on board for free. Additional carry-on bags range between 5.99 and 32.99 British pounds, depending on your destination and when you add the extra bag. The larger cabin bag measures 56 x 45 x 25 cm.

Ryanair

Ryanair is known for its strict baggage limits. They offer a small bag (40 x 20 x 25 cm) under the seat, or a larger carry-on (55 x 40 x 20 cm) up to 10 kg for an additional cost.

Air Arabia

Air Arabia offers one cabin bag not exceeding 55cm x 40cm x 20cm including wheels, pockets and handles, and weighing no more than 10kg. They also allow a handbag and a laptop as a personal item. Additional costs for checked luggage may apply, but these are not shared in advance and vary by flight.

Spirit Airlines

Spirit Airlines operates on an ultra-low-cost model, with a strict baggage policy. Their Basic Fare includes only a personal item (45 x 35 x 20 cm), with additional fees for carry-on and checked luggage. The Carry-On Bag option measures 56 x 46 x 25 cm.

Azul

Azul offers 1 carry-on (55 x 35 x 25 cm) and 1 personal item, with a combined weight limit of 10 kg.

General Tips

  • Many airlines require carry-on luggage to be 22 x 14 x 9 inches or smaller, but this can vary.
  • Always check the latest updates on the airline's website before your trip, as policies can change.
  • Weigh your bag at home with a portable luggage scale to avoid extra fees.
  • Choose lightweight, compact, and durable luggage that meets airline restrictions.
  • Be punctual! Check-in desks often close 30-40 minutes before departure, and if you are late, you may miss your flight.

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Packing tips

When packing a backpack for air travel, it's important to keep in mind the size and weight restrictions for carry-on luggage. While the Transportation Security Administration (TSA) sets regulations on what you're allowed to bring into the airport, ultimately, your airline has the final say on what's considered a carry-on bag. Most airlines implement a maximum size policy of 22 inches by 14 inches by 9 inches (or 56 by 36 by 23 centimetres), including wheels and handles. The weight of your backpack should be comfortable for you to lift and stow in the overhead compartment. Additionally, some basic economy tickets only allow for a personal item, such as a purse, rather than a standard carry-on bag.

  • Roll and fold your clothes: This method helps to reduce wrinkles and saves space compared to traditional folding.
  • Utilise shoes: Stuff socks and underwear inside sturdy or heavy-soled shoes to maximise space.
  • Separate cosmetics: Place liquids, gels, and aerosols in a separate drawstring bag or pouch. Ensure these products adhere to the 3-1-1 rule: 3.4 ounces (100 ml) or less per container, placed in a 1-quart-sized, clear and resealable bag.
  • Pack essentials at the top: Items you'll need easy access to, such as electronics, cosmetics, medications, and travel documents, should be packed in the top section of your backpack.
  • Use compression packing cubes: These can help you save space and organise your clothes for each day of your trip.
  • Wear bulkier items: Consider wearing bulkier clothes and jackets instead of packing them to save space.
  • Stay hydrated: Bring an empty, collapsible water bottle that you can refill after passing through airport security.
  • Bring your own snacks: Pack fruits, protein bars, dried fruits, crackers, and chocolate to stay energised and satisfied during your travels.
  • Prepare for entertainment: Pack items such as a laptop, book, e-reader, tablet, magazine, and headphones for in-flight entertainment. Don't forget to fully charge your devices before your trip.
  • Keep your passport safe: Use a passport holder with multiple compartments to protect your passport, cards, and other important documents.

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What not to pack

The size of your carry-on backpack is determined by your airline, not the TSA. Most airlines implement a maximum size policy of 22 inches by 14 inches by 9 inches, including wheels and handles. Your backpack must fit in the overhead bin or under the seat in front of you.

Now, here's what not to pack in your carry-on luggage:

  • Liquids, gels, and aerosols in containers larger than 3.4 ounces (100ml). This includes beverages, contact lens solution, shampoo, makeup products, liquid medicine, nail polish, perfume/cologne, face toner, hair gel, toothpaste, hand sanitizer, face serum, hairspray, dry shampoo, spray-on deodorant, and food items like peanut butter and creamy cheese. These items must be in travel-size containers and fit into a 1-quart-sized, resealable bag to go through the checkpoint.
  • Self-defense items, such as pepper spray and mace. These items have the potential to cause harm and should be transported in checked luggage.
  • Vaping devices and e-cigarettes. While these items must be packed in a carry-on, you are not allowed to vape or use e-cigarettes on the plane.
  • Safety and straight razors. These must be checked and can only be transported in carry-on or checked luggage if they are disposable or electric.
  • Loose lithium batteries. These may only be carried on and cannot be checked. Lithium batteries with 100 watt hours or less may be carried on the plane or checked if they are in a device.
  • Unwrapped gifts. While wrapped presents can be carried on board, security screeners may unwrap them for inspection. It's advisable to leave presents unwrapped until you reach your destination.
  • Any sharp objects that are not securely wrapped, such as knitting needles.
  • Medications and supplements that are not properly declared to screeners before going through security. Prescription and over-the-counter medications can be carried on board in unspecified quantities, but they must be declared and may be subject to additional screening.

Frequently asked questions

The size of your backpack depends on the airline you're travelling with and the fare type booked. Most domestic airlines allow 50-55L packs, while some international airlines have a maximum size policy of 22 x 14 x 9 inches. Some airlines, like United, have restricted fares that only allow one personal item, such as a backpack, that fits under the seat with specific dimensions.

If your backpack doesn't fit the size requirements, you may have to pay a fee to check your bag. Some airlines may allow you to upgrade your fare to include a carry-on bag.

Yes, most airlines have weight restrictions for carry-on bags. Weigh your bag before arriving at the airport to avoid surprises. The weight limit varies by airline, but generally, your bag should not exceed 50 pounds.

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