Mix 1 cup of Catalina dressing, 1 packet of dry onion soup mix, and 1 can of cranberry sauce in a large bowl. Reserve 1 cup of the mixture for later.
Add the boneless skinless chicken thighs to the bowl with the sauce and coat evenly.
Place the chicken thighs into the air fryer basket in an even layer without overlapping. Use a parchment or silicone liner for easier cleanup.
Cook at 400 degrees for 10 minutes then flip each of the thighs. Baste each one with more sauce and cook for another 10 minutes or until the internal temp reaches 165 degrees.
Heat the reserved sauce in the microwave or on the stovetop and serve it with the thighs as extra sauce.