Go to your companies, select a company, select a plane, then maintenance. Lower left corner there’s a sell button. If it’s greyed out, run maintenance. The sell price will be displayed and you can click the button to sell it.
Go to your companies, select a company, select a plane, then maintenance. Lower left corner there’s a sell button. If it’s greyed out, run maintenance. The sell price will be displayed and you can click the button to sell it.