50TH! TALKIN’ ‘BOUT MY GENERATION: TOP HITS OF ’69! PETER, PAUL & MARY “Leaving On A Jet Plane” was playing the Billboard Pop Singles chart and Detroit Top 40 radio on this date. 50 years ago. December 1969 https://usaradiomuseum.com/wp-content/uploads/2019/12/Peter-Paul-Mary-Leaving-On-A-Jet-Plane.mp3