What is the difference between check-in and carry-on luggage?

A carry-on bag goes on the plane with you and must fit in the overhead compartment. Checked luggage is relinquished to the airline at the airport and stored in the plane's cargo hold area, which is inaccessible to you during your flight.



The fundamental difference between check-in (checked) and carry-on luggage lies in where the bag is stored during the flight and what you can put inside it. Carry-on luggage stays with you in the cabin, stored either in the overhead bin or under the seat in front of you. It is subject to strict size and weight limits (usually around 22 x 14 x 9 inches) and must comply with TSA liquid rules (the 3-1-1 rule). Check-in luggage is handed over at the airport counter, tagged, and stored in the aircraft's cargo hold. It can be much larger and heavier (typically up to 50 lbs or 23 kg) and can contain items prohibited in the cabin, such as large liquids, pocket knives, or sporting equipment. While carry-ons offer the convenience of avoiding baggage claim and the risk of lost luggage, checked bags allow you to pack more for longer trips. Ideally, you should keep valuables, medications, and travel documents in your carry-on, while using checked luggage for clothing, shoes, and bulkier items that you won't need access to until you reach your final destination.

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Is it better to check luggage or carry on? Checking luggage means you do not have to carry it through the airport but there is always the risk of it being lost or damaged. It is cheaper to carry-on luggage and you can access your travel essentials during the flight or in the event of a lengthy layover.

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Firearms and ammunition, as well as any replicas or imitations. Explosives and flammable items, such as fireworks, gas, and aerosols. Poisonous and toxic substances, including pesticides and certain chemicals. Lithium batteries and other hazardous materials, as these can pose a safety risk if not handled properly.

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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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Carry-on requirements
  • Shouldn't exceed 22 x 14 x 9 inches / 56 x 36 x 23 centimeters (including handles and wheels)
  • Must fit in the sizer at the airport.


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A backpack can be your carry on if it meets your airline's carry on size limits. A personal item is a smaller, secondary bag, which you'll stow under the seat in front of you. Read Carry Ons vs. Personal Items for more on the differences between the two.

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While this can be confusing, most popular airlines allow you to bring a carry-on and personal item, such as a backpack or purse. 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.

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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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You can bring your medication in pill or solid form in unlimited amounts as long as it is screened. You can travel with your medication in both carry-on and checked baggage. It's highly recommended you place these items in your carry-on in the event that you need immediate access.

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Individuals who want to pack their large bottle of shampoo or full-size toothpaste should pack those items in their checked bags. Sometimes individuals want to travel with food items. That's just fine TSA.

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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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Almost any sharp object you can imagine will not be allowed on-board a plane in your hand luggage. This includes obvious items like knives, saws, swords, and machetes, but also small items with blades like pairs of scissors that are 4 or longer in size.

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Yes! You can pack 10 days of clothes in one carry-on bag. The key is to pack clothes that all work together, and of course, to use clothing organizers that maximize the space in your bag.

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A carry-on bag is any type of luggage that is small enough to store in the plane's overhead bin. For most domestic airlines in the Unites States, the size of your carry-on bag must be 22? x 14? x 9? or smaller.

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You can travel with your medication in both carry-on and checked baggage. It's highly recommended you place these items in your carry-on in the event that you need immediate access.

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Medications can be packed in a pill box. However, it is usually best to keep medicines in labeled containers provided by your pharmacist. TSA does not require medications to be in their original, labeled, prescription containers. However, using the original containers may limit delays or additional questioning.

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Even if your medications can be purchased over the counter from a pharmacy or supermarket, carry them in a clear plastic bag, in the original packaging, and tell the security officer that you have them with you.

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TSA Isn't Very Strict About Quart Size Bags
If the bag is transparent, resealable, and doesn't look much larger than a 1-liter Ziploc bag, it will be allowed. You'll only encounter problems if your toiletry bag looks way too large or if you encounter a very strict officer, but this happens rarely.

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You must be able to fit all your 3-ounce bottles into a 1-quart bag, which is 6 x 9 inches. This usually equates to nine bottles. FYI, you can use a Ziploc or any anything that's about that size, but the TSA doesn't officially approve or disapprove of any bags.

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Toothpaste is considered a liquid by the TSA (Transport Security Agency), even though it's technically a paste. In fact, all pastes, gels, waxes, and lotions are also classified as liquids. And even today, these substances are still restricted by the 3-1-1 rule in hand luggage due to safety threats.

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What is considered a personal item bag varies from airline to airline, but a small purse, briefcase and laptop bag are always considered personal items. Backpacks, totes, and crossbody bags are typically considered personal items too. The key to remember is it must be able to fit underneath the seat in front of you.

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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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In general, travelers are permitted to bring into the plane one personal item and one carry-on bag with them on most flights. The personal item is often a small bag, such as a handbag or laptop bag, that is able to be stowed away beneath the seat that is directly in front of you.

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