Do I have to check my carry-on at the gate?

If you're flying on an airline that charges for carry-on bags and you try to bring one without paying, the airline will require you to check it at the gate, and there'll likely be a fee attached. Some airlines have basic fares that only allow you to bring a personal item.



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Airlines publish the maximum dimensions allowed for carry-on bags. For example, American Airlines states that a carry-on bag's dimensions cannot exceed 22 by 14 by 9 inches, including handles and wheels. The carry-on must also fit into the sizer at the airport; if it doesn't, you'll be required to check it.

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It's not uncommon to have to gate check a bag, either because overhead bins are simply full, or because your carry-on exceeds the limit. Sometimes this is because passengers try to travel with a kitchen sink, while other times it's because airlines have unrealistically low carry-on limits.

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What to Do After Online Check-In. Once you receive your electronic boarding pass, you can head straight to security if you're traveling carry-on only. If you're checking a bag, you'll still need to stop by the ticketing area at the airport. Look for special “bag drop” lines that bypass longer check-in lines.

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Gate agents often keep track of the number of passengers who board with carry-on bags that are too large to fit underneath their seats. Planes don't have enough overhead bin space to allow every passenger to bring a carry-on bag, so there has to be a cut-off at some point.

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Is toothpaste considered a liquid by the TSA? Yes, toothpaste must adhere to the 3-1-1 rule for liquids and gels. Toothpaste can be brought through TSA security in your carry-on as long as it is 3.4 ounces (100 milliliters) or less and placed in a 1-quart bag.

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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.

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Carry-on Baggage Screening Here's what to expect when taking your carry-on bag through security screening next time you fly. You will be asked to remove personal electronic devices larger than a cell phone from your carry-on bag and place them into a bin with nothing placed on or under them for X-ray screening.

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“Most passengers know their large carry-on items go in the overhead bin wheels first. Jackets and coats go on top of the bag. Smaller bags go under the seat.” Wheels first makes it easier for passengers to grab the bag when leaving, making getting off the plane faster, which is something everyone wants.

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If you don't check in, you won't receive a boarding pass that allows you to board the plane, and your seat might be given up to a standby passenger. The check-in process also confirms your traveler details like your passport information and frequent flyer number.

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Most airlines recommend arriving at the airport two hours before departure for domestic flights. But this is a flexible recommendation depending on the specifics of your travel situation.

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Beyond ensuring you can get on the plane, Keyes also notes there are other goodies to be had by checking in as early as you can on an airline's website or app. Sometimes airlines allow seat selection after check-in or at least have first pick compared to folks who check-in later, he says.

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Can I use my mobile boarding pass to go through the security checkpoint and board my flight? Yes, simply show your mobile boarding pass on a mobile phone, iPad, or Apple Watch and a valid form of identification to the TSA Agent at security to proceed.

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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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Checked luggage is the best option for serious travelers. It's the right choice for when you need more packing space, especially if you plan to return home with large souvenirs and gifts. For longer trips of a month or more, checked luggage is the way to go unless you want to live within carry-on size limitations.

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Technically, any piece of luggage that you “carry on” to an airplane is a carry-on bag. Most airlines allow one piece of carry-on luggage or “hand baggage” that can fit in the overhead bin, plus a “personal item” (a smaller purse, computer bag, diaper bag, small backpack, etc.

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Each passenger may carry liquids, gels and aerosols in travel-size containers that are 3.4 ounces or100 milliliters. Each passenger is limited to one quart-size bag of liquids, gels and aerosols.

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Stick deodorant is fine in any size. Well, almost any size… Powders and crystals are good to go as well. Spray, Gel, Liquid, Cream, Pastes, and Roll-On deodorants need to be in containers no larger than 3.4 ounces and placed in a clear quart-sized baggie.

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Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage. The same applies for straight razors.

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