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.

In 2026, baggage size standards have become more strictly enforced across the industry. For carry-on luggage, the universal standard for major airlines (like Delta, American, and United) is 22 x 14 x 9 inches (56 x 36 x 23 cm), including handles and wheels. Many airlines now use digital gate sizers that are far less forgiving than the old "box" versions. For personal items (like a backpack or laptop bag), the limit is typically around 18 x 14 x 8 inches, and it must fit completely under the seat in front of you. If you are flying on smaller regional jets, even a standard carry-on may be "valet checked" at the jet bridge due to smaller overhead bins. For checked baggage, the standard limit is a total linear dimension (length + width + height) of 62 inches (158 cm). Exceeding these dimensions or the standard 50 lb (23 kg) weight limit usually results in steep "oversized" or "overweight" fees, which have trended upward to roughly $100–$200 per bag in recent years.