Many large North American airlines, have established operational relationships with one or more regional airline companies. Their aircraft often use the aircraft livery for the company they are operating flights for. These airlines can be subsidiaries of the major airline or fly under a code sharing agreement or operating through capacity purchase agreements, with the mainline parent company financing the aircraft for the regional airline, and then placing the aircraft with the regional for very little cost. An example would be Envoy Air, which is fully owned by American Airlines Group and does business as American Eagle.