Trump has had his own private jet for 25 yrs
http://www.businessinsider.com/donald-trump-boeing-757-airliner-trump-force-one-2016-6
No, the plane is 25 years old. He has only had it since 2010.
Before that, he had a 727. I haven’t yet found when he acquired it.
I found it. Trump bought the 727 in the 80’s. That’s the most exact I could find.
Of course, he may have had another plane before that.