how big can carry on luggage be

Most airlines cap standard carry-on luggage at around 22 x 14 x 9 inches (about 56 x 36 x 23 cm), including wheels and handles. Some allow slightly larger (like 24 x 16 x 10 inches), but you must always check your specific airline’s rules before flying.

Quick Scoop

• Typical maximum size for a carry‑on : 22 x 14 x 9 inches (56 x 36 x 23 cm).

• This measurement usually includes wheels, handles, and side pockets.

• Many U.S. full‑service airlines (American, Delta, United, Alaska, JetBlue) publicly list this same limit.

• Southwest is one of the more generous, going up to 24 x 16 x 10 inches.

• Ultra‑low‑cost carriers (Frontier, Spirit, etc.) often only let a smaller “personal item” (around 18 x 14 x 8 inches) on for free, and may charge for a larger carry‑on.

Why size still matters in 2026

In 2026 airlines are enforcing overhead bin space more strictly, so bags even a little over the posted limit can be forced to be checked at the gate (and sometimes with a fee). Travel guides updated for 2025–2026 still treat 22 x 14 x 9 inches as the safest “max” if you want a bag that works on most major airlines worldwide.

Simple rule of thumb

• If you want a bag that works on “most airlines most of the time”: stick to 22 x 14 x 9 in (56 x 36 x 23 cm).

• If you mainly fly a generous airline (like Southwest in the U.S.), you can go a bit bigger (up to 24 x 16 x 10 in), but that bag may not work with stricter carriers later.

Mini FAQ

• Q: Does TSA set a carry‑on size?
  A: No; TSA cares what’s inside, not the bag’s dimensions. The size limits are set by each airline.

• Q: What about weight?
  A: U.S. airlines often have no published weight limit, but many non‑U.S. airlines cap carry‑ons around 15–22 lb (7–10 kg).

Handy reference table

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Type of airline	Typical max carry‑on size	Notes
Major U.S. airlines (American, Delta, United, Alaska, JetBlue)	22 x 14 x 9 in (56 x 36 x 23 cm)	Most commonly quoted standard; safe “one‑bag” size for U.S. trips.
Southwest (U.S.)	24 x 16 x 10 in (61 x 41 x 25 cm)	More generous than most; bag may be too big for stricter airlines.
Many international full‑service airlines	Around 21.5–22 x 14–16 x 8–10 in	Often also have weight limits between 15–22 lb (7–10 kg).
Budget / ultra‑low‑cost carriers	“Free” item often ~18 x 14 x 8 in	Larger bags usually cost extra as a paid carry‑on or checked bag.

**Bottom line:** if you’re shopping for a new bag and want to stay safe, choose a carry‑on that is no larger than 22 x 14 x 9 inches and always confirm your exact airline’s current policy before you fly.

Information gathered from public forums or data available on the internet and portrayed here.