Now United set to pull out of Paine Field leaving it all to Alaska, the only airline to serve PF left all alone. Off top of my head I can not remember why SWA backed off of starting the PF flights and now United also gives up. Maybe SWA saw the writing on the wall prior to even starting flights there. Alaska may have a monopoly there by end of this year or early next.
United Airlines plans to stop flying to Paine Field in October, leaving Alaska Airlines as the only commercial airline at the airport serving Seattle's northern suburbs.