Keystone Aviation is the parent company of all the below subsidiaries.

Northwest Aircraft is the authorized Daher Socata dealer for the Pacific Northwest territory which encompases Oregon, Washington, Idaho, Montana and Wyoming. Northwest Aircraft offers new Socata aircraft as well as other used aircraft.   They are locaed at the Aurora Airport (KUAO), in Aurora, Oregon (23 miles south of downtown Portland).

Arizona Piper is the authorized New Piper Aircraft dealer for the entire state of Arizona . Arizona Piper offers the complete line of New Piper Aircraft as well as other used aircraft. Arizona Piper utilizes an extensive network of Authorized Service Centers to provide maintenance services to its customers.  Arizona piper is located at the Scottsdale Municipal Airport in Scottsdale, Arizona.

Million Air – Salt Lake City, located a the Salt Lake City International Airport, is a full service FBO providing a complete line of products and services for both General and commercial aviation. Services include executive aircraft charter, aircraft maintenance, jet aircraft sales and brokerage and aviation consulting.

Million Air – Provo, located in beautiful Provo, Utah, is a full service FBO providing Aircraft Sales, Executive Aircraft Charter Service, Aircraft Maintenance, Flight Instruction, Rental Aircraft and a Pilot Shop.  

HondaJet Northwest is the factory authorized distributor and service center for HondaJet aircraft in the Northwest Region encompassing Alaska, Washington, Oregon, Northern California, Idaho, Utah, Norhtern Nevada, Montana, Wyoming and Colorado.