While the terms are often used interchangeably, in 2026, the industry differentiates them by storage location. A "carry-on" (or cabin bag) is the larger piece of luggage, typically around 22×14×9 inches, designed to fit in the overhead bin. "Hand carry" (often called a personal item) refers to smaller bags like backpacks, purses, or laptop cases that must fit under the seat in front of you. Most airlines allow one of each for free, but "Basic Economy" fares on carriers like United or JetBlue often restrict you to only a hand-carry/personal item. If your hand-carry bag is too large for the under-seat space, you may be forced to gate-check it and pay a fee, so it is crucial to distinguish between the two when packing for different fare classes.