How Big Can a Carry-On Duffel Bag Be? | Official Size Guide
A carry-on duffel bag can be up to 22 x 14 x 9 inches for most US domestic airlines, aligning with standard overhead bin dimensions. International and budget carriers often enforce stricter limits, typically 21.5 x 15.5 x 9 inches. Always verify your specific airline’s size rules, as these are the maximum allowable dimensions. A…