While bag weight limits vary by airline and ticket class, the global standard for a checked bag in economy class is typically 23 kg (50 lbs). On most international and long-haul flights, this limit is strictly enforced, and exceeding it can result in "heavy bag" fees ranging from $50 to $200. For domestic flights, especially on "Ultra Low-Cost Carriers," the limit might be lower—sometimes as low as 15 kg or 18 kg—or checked bags may not be included at all. For carry-on luggage, the standard weight limit is often 7 kg (15 lbs) or 10 kg (22 lbs), though many major US airlines (like Delta or United) do not actually weigh carry-on bags as long as they fit the physical size dimensions. In 2026, many Indian and Asian carriers have tightened their rules, strictly enforcing a one-bag, 7 kg carry-on limit at the gate. Business and First Class passengers usually enjoy a more generous allowance, often permitted two checked bags at 32 kg (70 lbs) each. Always check your specific "Manage Booking" page on the airline's app, as these limits can vary significantly based on your frequent flyer status or the specific aircraft being used for the route.