The answer to 'how much to fix ductwork' is that the cost can vary widely depending on several factors. In general, repairing or replacing ductwork can range from a few hundred dollars for minor fixes up to several thousand dollars for more extensive work. The specific cost will depend on the size of your home, the accessibility and condition of the ductwork, the materials needed, and the complexity of the job.
For example, fixing a small leak or reconnecting a duct may cost a few hundred dollars, while completely replacing aging or damaged ductwork throughout a home can be a major project costing thousands. The best way to get an accurate estimate is to have an HVAC professional inspect your system and provide a quote based on the specific work required.