Click "More" at bottom of screen. Then "Aircraft" on left menu. Then one finger swipe to the left on the aircraft you want to delete. The red Delete option appears. Click it.
You're welcome.
That.
The unintuitive left swipe.
If you are not an Apple user, it does not come easy. But you will get used to it. I caught myself swiping left automaticlly without looking for a delete button or anything. I am turning into a semi-knowledgeable user. I am now dangerous enough to get myself into trouble. God help me.