Individual airlines have different weight restrictions for passengers. A weight limit of 50lb for each item of checked luggage is the most common. Airlines don't usually weigh carry-on luggage, although they may have size requirements. A portable luggage scale can help you make sure you're within your airline's weight restrictions. If your check-in bag is a little heavy, you may be able to move some items into your carry-on bag. The weight of luggage doesn't usually matter for cruises or road travel, although lighter bags are more manageable. If you fly to a cruise port, remember you'll still need to consider your airline's weight restrictions.