American Airlines Carry-On Size: 22 x 14 x 9 Inches and the Sizer That Decides

Photo by American Green Travel on Unsplash

American Airlines publishes one carry-on number and one personal item number, and both are on the same page: 22 x 14 x 9 inches (56 x 36 x 23 cm) for the carry-on, 18 x 14 x 8 inches (45 x 35 x 20 cm) for the personal item. That is the whole answer to the size question. The part that decides whether you actually board with your bag is a different sentence on the same page, and almost nobody reads it: "Must fit in the airport sizer."

The numbers, exactly as American Airlines prints them

Where these numbers come from: American Airlines carry-on page, American Airlines checked bag page. Read and recorded on 2026-08-31. Every figure on this page is copied from those pages — nothing here is estimated. Airlines change baggage rules without notice, so check the official page before you fly.

The sizer decides, not your tape measure

American's carry-on page carries an instruction the others do not phrase so plainly. Your bag "must fit in the airport sizer." That is a physical box at the gate and at the ticket counter, and it is the actual test. A tape measure tells you what your empty bag measures. The sizer tells you what your packed bag measures, which is a different number once a hard-shell case has been overpacked and its lid is bowing, or once a soft bag's front pocket is full of a jacket and a water bottle.

Two practical consequences follow. First, measure the bag packed, not empty, and measure across the fattest point rather than the frame. Second, treat expandable zips as decoration on the outbound leg. A 22-inch case with a 2-inch expansion zip is a 24-inch case when the zip is open, and American's published figure has no allowance for expansion.

The other line worth knowing is the exception American writes for garment bags: a soft-sided garment bag "cannot exceed 51 inches (130 cm) in total dimensions." That is more total size than the 45 inches a normal carry-on adds up to, so if you are carrying a suit, the garment bag is the more generous route — and it is written on the same page most people skim past.

On the checked side American publishes one figure for almost everywhere and a separate one for Australia and New Zealand. The general limit is 62 in / 158 cm and 50 lbs / 23 kgs. In First and Business the free-bag weight rises to 70 lbs / 32 kgs, but excess bags you pay for stay at 50 lbs even in a premium cabin. On flights to or from Australia and New Zealand, every confirmed passenger gets the 70 lb figure on free bags regardless of cabin. If you are flying that route in Economy, that is 20 pounds of allowance most travellers never learn they had.

Measuring your own bag against these numbers

The bag most retailers label "the standard carry-on" is 22 x 14 x 9 inches. Converted exactly, that is 55.88 x 35.56 x 22.86 cm, and the three sides add to 114.3 cm. Held against American Airlines's published limits, here is where it stands.

It fits. Every side of the standard bag is inside American Airlines's published maximum of 56 × 36 × 23 cm. That gives you no meaningful margin in the directions where it matters, but the margin exists only for an unpacked bag: soft sides bulge, and hard shells bow at the lid when overfilled.

The reverse question matters just as much if you already own luggage. A bag bought to fit JetBlue, United Airlines, Delta Air Lines also clears American Airlines. A bag bought to fit Southwest Airlines, Frontier Airlines, Air Canada, Korean Air does not — those boxes are larger than American Airlines allows in at least one direction.

Whichever airline you are flying, measure the same way the airline does: bag packed, tape across the widest bulge rather than the frame, wheels and handle included, expansion zip closed. Every airline on this page that says anything about wheels says they count.

What American Airlines does not publish

These were checked against American Airlines's own baggage pages on 2026-08-31. The following are simply not stated there, so treat any number you find elsewhere for them as somebody's inference rather than a rule:

• A carry-on weight limit
• A carry-on weight limit in pounds
• A combined length + width + height cap
• A personal item weight limit
• How many checked bags are included

How American Airlines compares with the other seven

American sits in the middle of this group. Two airlines allow a bigger cabin bag, five allow the same or less. American Airlines ranks fourth of the eight by published cabin volume at 46.4 litres, between Southwest Airlines's 62.9 at the top and Korean Air's 44.0 at the bottom. Volume is the published box multiplied out, which is the fairest way to compare boxes of different shapes.

The full eight-airline table, including checked bag limits, is on the comparison page. Alaska Airlines is deliberately absent from it: its baggage pages would not open to us, and we would rather leave a gap than print a figure we could not read on an official page.

Buying a bag that clears American and most of the rest

American's 22 x 14 x 9 is the size most international carry-on luggage is designed around, so a bag bought to it will clear United, Delta and JetBlue as well. It will not clear Korean Air's 20 cm depth limit and it is marginally over Air Canada's 55 cm height. If those two airlines are in your normal rotation, size down to a 21-inch case and give up roughly four litres.

Skip expandable cases if you intend to use the expansion. Prefer a soft or hybrid shell if you regularly fly full flights, because a soft bag that is a few millimetres over will go into a sizer and a hard one will not.

The other seven airlines

• Southwest Airlines carry-on and checked bag sizes
• Frontier Airlines carry-on and checked bag sizes
• Air Canada carry-on and checked bag sizes
• JetBlue carry-on and checked bag sizes
• United Airlines carry-on and checked bag sizes
• Delta Air Lines carry-on and checked bag sizes
• Korean Air carry-on and checked bag sizes

Related pages on TripPack

• All eight airlines in one table — carry-on, personal item and checked limits side by side.
• Carry-on packing list — what to actually put in the bag once you know it fits.
• How to measure a carry-on bag — where to hold the tape.
• Baggage weight limits explained.