Hey, Passengers can check in and pay for their bags during the 24-hour check-in window on delta airlines baggage fees, mobile app, or at airport kiosks. All bags must weigh no more than 50 pounds (23 kilograms) and have a maximum size of 62 linear inches (158 centimeters). Overweight bags (51-70 pounds) cost an extra $100, while bags weighing 71-100 pounds cost $200. Bags weighing more than 100 pounds are not accepted.