Each carrier is allowed to set its own baggage policies. Checked baggage allowance measurements are given in "linear inches." This means that carriers look at the length, the width and the height of bags before assessing oversized luggage fees. For example, if the linear inch allowance is 62 inches, a piece of luggage that is 22 inches long, 20 inches high and 20 inches wide would be allowed, as would a piece of luggage 60 inches long, one inch wide and one inch high. The Continental, Delta and United Airlines limits are each 62 linear inches for domestic flights (flights in the United States and Canada). If a customer goes over this, airlines impose an excess fee. The policies of other airlines will vary.
There are also weight limits on flights in the United States and Canada. For Continental, Delta and United Airlines, the weight limit is 50 pounds per checked bag. If a customer has a bag which weighs more than this, the airlines will impose a penalty fee. The policies of other airlines will vary.
There are more variations between airlines on baggage allowances for international flights. For Continental and Delta Airlines, checked bags must weigh less than 50 pounds and be 62 linear inches or fewer, as with domestic flights. However, United Airlines makes distinctions for international travelers based on the ticket the traveler purchases, special flight clubs they are members of and whether they are a member of the US Military, with military members allowed larger and heavier luggage than civilians. Check with your airline for their policy on international checked luggage restrictions.
