Continental then began the process of consolidating its four commuter carriers (PBA, Bar Harbor, Britt, Rocky Mountain) into one consolidated Continental Express carrier, serving its main hubs at Newark, Houston, and Denver. The combined carrier operated using the Britt Airways operating certificate. In the consolidation, PBA's Florida routes were spun off to Eastern Airlines, and continued to operate using Bar Harbor Airways aircraft and operating certificate as Eastern Express until the demise of Eastern Airlines. The PBA hubs at Boston and LaGuardia continued to operate for a little while longer.