Lawyer William L. Robinson, who represents some of the companies sued, says the terms of the settlement are confidential.
He says the settlement involves all defendants, including Learjet, Goodyear Tire & Rubber Co. and the plane's owners and contractors.
The former Blink-182 drummer was one of two survivors of a Sept. 19, 2008 plane crash that killed two pilots and two of his friends. Another survivor, celebrity disc jockey DJ AM, has since died of an accidental drug overdose.
Barker sued last November claiming the companies improperly operated and maintained the Learjet that overshot the runway and burst into flames.