Can I bring a backpack on Frontier for free?

Can I bring a carry-on bag and a backpack at the same time on Frontier? Yes, but keep in mind that you'll have to pay for the carry-on bag. As long as your backpack fits the size and weight requirements, it's counted as your (one) free personal item.



On Frontier Airlines in 2026, you can bring a backpack for free only if it qualifies as a "Personal Item" and fits within the specific dimensions of 14” H x 18” W x 8” D. Most standard school-sized or "daypack" backpacks will fit these requirements and can be stored under the seat in front of you. However, if your backpack is a large hiking pack or a "travel backpack" designed to fit in the overhead bin, it will be classified as a Carry-on Bag, which requires an additional fee. Frontier is very strict about these measurements; if your backpack exceeds the personal item size at the gate, you may be charged a "Gate Bag Fee," which is significantly more expensive than paying for a bag in advance. To avoid extra costs, it is best to use a soft-sided backpack that can be compressed into the "sizer" box if a gate agent asks you to test it. Note that items like medical equipment and diaper bags do not count toward this one-item limit.

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Personal Items and Frontier. Passengers may board a Frontier flight with one small personal item, such as a purse, tote bag, computer bag, or small backpack. The maximum size for a personal item is 8 x 18 x 14 inches, including handles, straps, and wheels.

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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. In most cases, backpacks are considered personal items as long as they fit under the seat in front of you.

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The short answer: Yes, a backpack is generally considered a personal item if it fits under the seat in front of you. Most airlines offer a few examples of things that fit into the “personal item” category, such as a purse, laptop bag, or a briefcase, but they don't usually include “backpack” on those lists.

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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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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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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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To do this, measure the linear dimensions - the height, width and depth of the backpack, then multiply these three values. The result will be the volume of the backpack in cubic centimeters or meters (depends on the unit of measurement taken as the base).

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Frontier carry-on guidelines. The Frontier carry-on guidelines allow all passengers to bring one personal-size carry-on on board for free. However, the bag must be able to fit underneath the seat in front of you and should be no bigger than 15 inches in height by 18 inches in width by 8 inches in depth.

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Many airlines will allow you to bring a carry-on bag and personal item for free. However, some airlines may only allow a personal item that fits under your seat for free. Anything larger (e.g. a bag that's too big to fit under the seat but can fit into the overhead compartment) may require extra payment.

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How does seating work on Frontier Airlines? Most Frontier Airlines tickets do not include complimentary seat assignments. This means you have two options: Pay for a seat or skip seat selection. By skipping seat selection, you might get stuck in a middle seat or separated from your party — but it's free.

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Your backpack will generally be allowed as a carry-on if it's under 50 liters, or about 22 x 14 x 9 inches. Get a 45-liter backpack if you want to carry as much stuff as possible on the plane with you.

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Generally, you're allowed one carry on and one personal item, such as a purse, suit bag, briefcase. As long as your backpacks conform to the airline size specifications for hand luggage, it's not a problem that both your carry-ons are backpacks.

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As a general rule of thumb, anything smaller than the dimensions of a carry-on can be considered a personal item. However, every airline has different restrictions for size. In most cases, your backpack should be no more than 18 x 14 x 8 inches.

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Yes. The usual maximum dimensions for carry-on luggage are 9 inches x 14 inches x 22 inches (22 centimeters x 35 centimeters x 56 centimeters). This is 43.12L, so your 50L backpack is about 16% too big. You might get away with it because the gate staff often doesn't (have the time to) check the bag sizes in all detail.

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? Flight Approved Carry on Backpack: Size of travel backpack: 20.47 x 12.99 x 8.66 . Capacity: 35L. This luggage backpack is meet the allowed maximum size of most IATA flights and also fits in the overhead compartment and the underseat in flight.

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Carry-On Baggage: Carry-On Bags can be no larger than 24” tall, 10” wide, and 16” long (including handles, wheels, and straps) and no heavier than 35 pounds. Carry-on Bags may be placed in the overhead compartment or under the seat. Think large backpacks, small duffel bags and small suitcases/wheeled bags!

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While some airlines specify size limitations for personal items, others simply require the item to be small enough to fit underneath the seat in front of you. For personal items, here's the standard size on major airlines in the United States: American Airlines – 18” x 14” x 8”

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