Standard carry-on dimensions across U.S. airlines

Most major U.S. airlines allow a carry-on bag measuring 22 inches long by 14 inches wide by 9 inches deep. This is the size limit set by the Federal Aviation Administration (FAA), and airlines including American, Delta, United, Southwest, and JetBlue all follow it. Your bag must fit in the overhead bin or under the seat in front of you without being forced or compressed.

The 22 × 14 × 9 measurement is a maximum, not a target. Airlines measure bags at the gate, and if your luggage exceeds these dimensions, you will be asked to check it instead. Some airlines use a sizer frame—a metal or plastic box at the gate—to test whether your bag fits. If it does not slide through easily, it does not meet the requirement.

Weight limits for carry-on bags vary by airline. Most do not enforce a strict weight limit for carry-on luggage the way they do for checked bags, but some regional carriers and international airlines may have restrictions. Check your specific airline's website before packing.

Key Takeaways

  • The FAA standard for carry-on luggage is 22 inches long by 14 inches wide by 9 inches deep, and most major U.S. airlines enforce this limit.
  • Your bag must fit in the overhead bin or slide under the seat without being forced, even if it meets the stated dimensions.
  • Airlines measure bags at the gate using a sizer frame, and oversized luggage will be checked at no charge on most carriers.
  • Budget airlines like Frontier and Spirit may have smaller carry-on allowances or charge fees for standard-sized bags, so verify your airline's policy before traveling.
  • International airlines often have different size and weight limits, especially for long-haul flights, so check your carrier's rules if you are flying outside the U.S.

How to measure your bag correctly

Measure your luggage from the outside, including handles and wheels. Use a soft measuring tape or a ruler, and measure the longest point in each direction. If your bag has a handle that extends above the main body, include that in the length measurement. Wheels count toward the width and depth.

Many rolling carry-on bags are sold as "22-inch" luggage, but this measurement often refers to the bag's height alone, not the full 22 × 14 × 9 calculation. Read the product description carefully. A bag labeled "22-inch carry-on" may actually measure 22 × 14 × 10, which exceeds the FAA limit by one inch. Check the manufacturer's full dimensions before buying.

What happens if your bag is too large

If your carry-on exceeds the size limit, the airline will check it at the gate at no charge on most carriers. Your bag goes into the cargo hold and arrives at baggage claim with your checked luggage. This happens frequently enough that airlines have a standard process for it—you will not face a fee or penalty on major U.S. carriers.

The exception is budget airlines like Frontier, Spirit, and Allegiant. These carriers charge fees for standard carry-on bags or allow only a personal item (a purse, backpack, or small bag that fits under the seat). Read the fine print on your ticket confirmation. If you are flying a budget carrier and your bag is oversized, you may be charged $35 to $50 to check it at the gate.

Personal item vs. carry-on bag

In addition to your carry-on roller bag, most airlines allow one personal item at no charge. A personal item is typically a purse, backpack, laptop bag, or small daypack that fits under the seat in front of you. There is no official size limit for a personal item, but it should be small enough to fit in the space under a standard airplane seat—roughly 18 inches long by 14 inches wide by 8 inches deep.

Some travelers pack a personal item and a full-sized carry-on, which is allowed. However, if the overhead bins are full, the flight attendant may ask you to check your carry-on. The personal item stays with you because it fits under the seat. If you are traveling on a budget airline that charges for carry-on bags, you can usually bring a personal item for free.

Differences by airline and route

Most major carriers follow the 22 × 14 × 9 standard, but there are exceptions. Southwest allows the same dimensions but is known for being more lenient at the gate. Alaska Airlines, Hawaiian Airlines, and JetBlue also use the FAA standard. Regional carriers operated by major airlines—such as SkyWest flying for United or Republic flying for American—may have smaller limits on some routes.

International airlines often have stricter rules. Many European and Asian carriers limit carry-on bags to 22 × 14 × 9 inches but also enforce a weight limit of 26 pounds or less. Some airlines measure bags differently or allow only one carry-on item instead of a carry-on plus a personal item. If you are flying internationally, check your airline's website before packing.

Low-cost international carriers like Ryanair and EasyJet have notoriously small carry-on allowances. Ryanair's standard carry-on is 21.7 × 15.7 × 7.9 inches—smaller in every dimension than the FAA standard. If you are flying a budget international airline, measure your bag against their specific limits, not the U.S. standard.

Tips for packing within the size limit

Choose a bag designed to fit the 22 × 14 × 9 standard. Soft-sided luggage compresses slightly, which can help it fit in tight overhead bins. Hard-sided luggage does not compress, so it must be exactly within the dimensions. If you are a frequent traveler, invest in a bag you know fits; measuring every trip wastes time at the airport.

Pack heavier items at the bottom and lighter items on top. This makes the bag easier to lift into the overhead bin and less likely to shift during flight. Leave a small amount of space inside so the bag is not completely rigid—a slightly soft bag is easier to fit into a full bin than one that is packed solid.

Arrive early enough to board in an earlier group. Overhead bin space fills up quickly, especially on full flights. If you board early, you will have a choice of bins and will not be forced to check your bag because there is no space left.

Frequently Asked Questions

Can I bring a roller bag and a backpack on the plane?

Yes. Most airlines allow one carry-on roller bag (22 × 14 × 9 inches) plus one personal item such as a backpack, purse, or laptop bag. The personal item must fit under the seat in front of you. If the overhead bins are full, you may be asked to check your carry-on, but your personal item stays with you.

Do airlines actually measure bags at the gate?

Yes, but not on every flight. Airlines measure bags more often on full flights or when the overhead bins are nearly full. On less crowded flights, bags are rarely checked. However, if your bag is visibly oversized, you should expect it to be measured and possibly checked.

What if I buy a bag that says "carry-on approved"?

Check the manufacturer's full dimensions, not just the marketing label. Many bags sold as "carry-on approved" actually exceed the 22 × 14 × 9 limit. Measure the bag yourself or read the detailed product specifications before buying. A bag labeled "22-inch" may be 22 × 14 × 10, which is one inch too deep.

Are carry-on size limits different for international flights leaving the U.S.?

The FAA limit applies to flights within the U.S. and flights departing the U.S. However, the airline operating the flight may have its own rules. If you are flying internationally on a foreign airline, that airline's carry-on limit applies, which may be smaller. Check your airline's website for the specific route.

Can I bring a full-size suitcase as a carry-on?

Most full-size checked suitcases are 28 inches or larger and will not fit the carry-on limit. If you want to bring only a carry-on bag, buy a bag specifically designed for carry-on travel. Trying to force an oversized suitcase into the overhead bin will result in it being checked at the gate.