What happens if your personal item is too big Jetblue?

Personal items must not exceed 17 L (43.2 cm) x 13 W (33 cm) x 8 H (20.32 cm). Blue Basic fares include 1 personal item that fits under the seat in front of you, like a purse, daypack, laptop bag or pet carrier. Any additional or larger carry-on bags brought to the gate will incur a fee and need to be checked.



If your personal item exceeds JetBlue’s dimensions (typically 17" L x 13" W x 8" H), you will be required to check it at the gate. In 2026, JetBlue’s "Blue Basic" fares do not include a carry-on bag, only a personal item that must fit under the seat in front of you. If it doesn't fit, the bag will be moved to the cargo hold and you will be charged the standard checked bag fee ($35–$60) plus a $25 gate-handling fee. For those in higher fare classes (Blue, Blue Plus), the item may be counted as your one allowed carry-on bag if space permits in the overhead bin. However, if the overhead bins are full, it will still be gate-checked. To avoid these "surprise" costs, JetBlue encourages passengers to use the automated bag-sizing kiosks located near the check-in counters before heading to security.

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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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Customers are prohibited from taking liquids, gels, and/or aerosols past the airport security screening checkpoint except: One clear transparent, resealable one-quart (one-liter) sized plastic bag containing liquids, gels, and aerosols in travel size containers (3.4 oz./100 ml capacity) or less per container.

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While these sizes vary by airline, a personal item will typically measure no more than 18 x 14 x 8 inches or 45 x 35 x 29 cm. If your bag does not fit within these dimensions, the airline will likely consider it your 'carry-on' bag and charge you accordingly.

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Domestic carry-on policies. A good rule of thumb is that if your carry-on bag fits under the seat in front of you, it's considered a personal item. This includes small backpacks, purses, briefcases, laptop bags, etc. Larger bags, including suitcases, must fit in the overhead bin compartment.

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All carry-on must fit the sizer at the departure gate. If the bag does not fit in the sizer, it will need to be checked. American Airlines will charge a checked bag fee for oversized carry-on, which costs between $30 to $200 depending on your destination and how many bags you have already checked.

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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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American Airlines
According to airline policy, any personal items stowed beneath seats should not exceed 18 inches by 14 inches by 8 inches.

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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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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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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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In most cases, an airline will allow you to bring one carry-on baggage and one personal item. A personal item is normally something like a purse, laptop, backpack or camera case. Personal items should always be small enough to fit underneath the seat in front of you.

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