Wings West Airlines was a regional airline in the United States headquartered at McChesney Field (SBP), unincorporated San Luis Obispo County, California. The airline initially began scheduled passenger service as an independent commuter air carrier and then subsequently became an American Eagle affiliate of American Airlines operating turboprop aircraft on code sharing flights on behalf of American.

Simmons Airlines was a regional airline in the United States. It was the predecessor to American Eagle Airlines. Its headquarters were originally near Marquette, Michigan, at the Marquette County Airport in Negaunee Township, and were eventually moved to the Near North Side of Chicago, Illinois.