The weight limit for Delta Airlines is 50 pounds or less for checked baggage, in order to avoid the assessment of additional fees. Delta also restricts the size of checked bags to 62 inches when adding the length, width and height of each bag, as of December 2015.
Active U.S. military members may exceed the weight restrictions for checked baggage by 20 pounds and pay no additional fees for bags weighing 70 pounds or less when traveling for official military purposes. However, they are subject to the standard 50-pound weight restriction when traveling for personal reasons.
There are generally no weight restrictions for carry-on bags except for a 15-pound limit at Chingi International Airport in Singapore and 22-pound limits at Incheon International Airport in South Korea, Pudong International Airport in Shanghai and Beijing Capital International Airport in Beijing.