Airline Baggage Allowance Facts: Most airlines allow each passenger to bring one free carry-on bag plus a personal item, such as a backpack, laptop bag, or purse. The maximum size allowed for a carry-on bag is usually 22” x 14” x 9”, but check with your airline . Most airlines also offer checked bags, where passengers can check a larger piece of luggage, fees included. The max size allowed for a checked bag is usually 62” x 50”. This max refers to the sum of the bag’s length + width + height. This size includes the wheels or the handle.