If your carry-on is oversized (and doesn't physically fit inside the overhead compartments) or you encounter a strict airline employee, they will ask you to check it in at the gate.
People Also Ask
While personal item size restrictions vary across airlines, most airlines consider a small backpack, purse, briefcase, or laptop bag to be a personal item. These must always fit under the seat in front of you. Many airlines restrict passengers to one personal item and one carry on bag.
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.
Unless your carry-on is extremely large, the airline employees at the gate most likely won't ask to measure it. If they'd ask each passenger to measure their carry-on, the boarding would take too long. This could cause delayed flights, which airlines don't want.
If your carry-on is oversized (and doesn't physically fit inside the overhead compartments) or you encounter a strict airline employee, they will ask you to check it in at the gate.
In general, standard domestic carry-on luggage size is 22 x 14 x 9 inches. If you're flying internationally, that may vary a little to 21.5 x 15.5 x 9 inches. Remember, those dimensions include the handle, wheels and anything else that may protrude from your suitcase so don't miss them from your measurements.
Carry-on bags shouldn't be larger than 22 inches long, 14 inches wide and 9 inches high including handles and wheels. Dimensions of personal items should not exceed 18 inches long, 14 inches wide and 8 inches high. There are no weight restrictions for carry-on luggage.
What if my cabin bag is 2cm bigger? Extra 2–4 cm wont be noticed by the check in staff and they dont have a ruler to measure the dimension. they only strict with the weight. But extra 2–3 kg is also not a problem.
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.
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.
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.
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.
A personal item is any type of luggage that fits underneath the plane seat in front of you. Most domestic airlines in the United States require a personal item to be 18” x 14” x 8” or smaller in size. Personal items can include a purse, briefcase, small backpack, laptop bag, weekender or small duffel bag.
As airlines try to squeeze more passengers on their flights – and as more passengers try to fit their belongings into a single carry-on to avoid baggage fees – space is getting tighter.
On domestic flights within the United States, a carry-on bag that's smaller than 22 x 14 x 9 inches (45 linear inches), including handles and wheels will meet the size restrictions of all major airlines, such as United Airlines and Alaska Airlines.
In fact, carry-on allowance isn't determined by the TSA but instead by individual airlines. Generally speaking, most airlines implement a maximum size policy of 22 inches by 14 inches by 9 inches, including wheels and handles. Your baggage allowance could also depend on your ticket type.
Unless your carry-on is extremely large, the airline employees at the gate most likely won't ask to measure it. If they'd ask each passenger to measure their carry-on, the boarding would take too long. This could cause delayed flights, which airlines don't want.
Is a 24-inch Carry-On Too Big? Most airlines can accommodate a 24-inch carry-on, but not all. Generally, a carry-on suitcase measuring 22 inches x 14 inches x 9 inches, commonly seen as 22 x 14 x 9, would be the most widely accepted size.
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.
How big can my carryon be? Your carryon can be no bigger than 24” (L) + 16” (W) + 10” (H). If it's bigger than those dimensions, it will need to be checked.
If your carry-on is 1-2 inches over the size limit, don't stress about it too much. Most likely, you'll be allowed to pass through without anyone saying anything. But be prepared that if you encounter a strict airline employee, you might have to check it in.