United Airlines Carry-on Size Restrictions. Carry-on luggage for a United Airlines flight must be no larger than 9 inches X 14 inches X 22 inches (22 cm X 35 cm X 56 cm). When measuring, remember these dimensions include the luggage's wheels and handles.
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United Airlines Carry-On BaggageOne full-sized carry-on bag 9 inches x 14 inches x 22 inches (22 cm x 35 cm x 56 cm) plus one personal item 9 inches x 10 inches x 17 inches (22 cm x 25 cm x 43 cm). If you are travelling on a Basic Economy ticket, your personal item will be the only item you can bring on board.
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.
Typically a gate agent will check it to your destination for free. However, if it's too large to be a carry on size they may charge you for it. You inform the flight attendant and he / she gate checks it to your next stop. This is normally done at no charge.
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.
Oversized Carry-Ons Need to Be Checked-inIf 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.
Carry-on bags are limited to 22 inches long, 14 inches wide and 9 inches high including wheels and handles. All three measurements shouldn't add up to more than 45 inches.
Your Carry-on bag must fit in the overhead bin, so it must be 9 in x 14 in x 22 in (23 cm x 35 cm x 56 cm). When measuring your bag, be sure to include the handle and wheels.
Personal items can not be larger than 9 inches X 10 inches X 17 inches (22 cm X 25 cm X 43 cm). As with carry-on luggage, United's carry-on rules for personal items do not consider weight.
Personal items must fit under the seat in front of you. Common items include backpacks, laptop bags, and purses. These bags can be no larger than 9 x 10 x 17 inches (22 x 25 x 43 cm). Like carry-on bags, personal items do not have to meet a weight requirement.
International carry-on sizes are generally smaller than the US domestic limit of 22 x 14 x 9 inches or 45 linear inches. Carry ons for international flights are usually between 22 and 15.7 inches tall, with varying depth and width limits.
Most regular airlines won't check the size, unless it's obviously way larger or heavier than your allowance, but you may need to consider where is that extra inch, if it's too wide/thick, it may not fit in the baggage overhead compartment and a flight attendant may check it in for you…
The good news is that, yes, a 24-inch luggage can be a carry-on as long as it meets the size restrictions set by the airline you are flying with. Most airlines have similar size restrictions for carry-on luggage, with the maximum dimensions being 22 inches x 14 inches x 9 inches.
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.
The only time this might be worth the risk is if your personal item is only an inch or so bigger than that of the limits stated, and is soft-sided. At least if it's only slightly bigger, you should still be able to pad it down and demonstrate it fits in the sizer if required to.
Carry-on bags must weigh less than 35 pounds and must not exceed 10 inches deep, 16 inches wide and 24 inches high. Bags must fit in the overhead bins. Checked bags must be no longer than 62 linear inches (length + width + depth) and must weigh under 40 pounds.
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.
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.
What is the weight limit for carry-on luggage? For many major domestic airlines — think: Delta, Southwest, JetBlue — there are no weight restrictions for carry-on bags. You'll just have to be able to lift it above your head into the storage bin.