It is common for airlines to impose an upper limit of 62 inches (length plus width plus height) on checked baggage. This is the maximum size permitted for checked baggage on flights with Delta Airlines, American Airlines and Southwest Airlines as of 2015. It is also common for airlines to impose a weight limit on checked baggage, and this is commonly 50 pounds.
The weight limit for some airlines may vary depending on the destination. With American Airlines, for instance, passengers travelling to and from Brazil are allowed to check baggage up to a maximum weight of 70 pounds, although the 62-inch size limit still applies.
Weight limits, as well as the number of pieces of baggage permitted, may also vary depending on whether passengers have a first class or regular ticket. For example, on most Delta Airlines routes, first and business class ticket holders, as well as passengers of Delta One aircraft, are permitted to check two pieces of baggage, each weighing up to 70 pounds. By contrast, passengers with regular tickets are often required to pay a surcharge for checked baggage and are rarely allowed to check any one piece of baggage weighing in excess of 50 pounds. The exception is on flights to and from Brazil, on which regular passengers are permitted to take up to two pieces of checked baggage, each weighing up to 70 pounds.