He was carrying a black briefcase and bought a $20 one-way ticket on Flight 305 to Seattle, Washington. It was a 30 minute journey.
Upon boarding the Boeing 727-100, the passenger dressed in a dark suit and loafers sat in seat 18C at the back of the passenger cabin.
Witnesses say he was in his mid-forties, of average height and wore a black raincoat over his freshly pressed business suit.