American Airlines overweight baggage is considered any bag weighing more than 50lbs. The fees for checking overweight baggage are $100 for bags weighing 51-70lbs and $200 for bags weighing 71-100lbs. These fees are charged in addition to any standard, excess or oversized baggage fees.

If your checked bag exceeds the 50-pound (23 kg) limit on American Airlines in 2026, you will be hit with an Overweight Baggage Fee. For bags weighing 51 to 70 pounds, the fee is typically an additional $100 to $200 per bag, depending on the destination. If the bag is 71 to 100 pounds, the fee jumps to $200 to $450. A supportive peer warning: American Airlines generally will not accept any bag over 100 pounds for safety reasons. However, if you are flying in First or Business Class, or if you have Elite Status (Platinum or higher), your weight limit is usually increased to 70 pounds per bag for free. If you find your bag is overweight at the kiosk, it is often much cheaper to buy a second "Standard" bag for $35–$40 and split the contents rather than paying the $100+ overweight penalty.