"Leaving on a Jet Plane" is a song written and recorded by singer-songwriter John Denver in 1966, originally included on his debut demo recording John Denver Sings as "Babe I Hate To Go". He made several copies and gave them out as presents for Christmas of that year. Denver's then producer Milt Okun convinced him to change the title and was renamed "Leaving on a Jet Plane" in 1967.

In 1969, simultaneous to the success of the Peter, Paul and Mary version, Denver recorded the song again for his debut studio album, Rhymes & Reasons, and it was released as a single in October 1969 through RCA Records. Although it is one of John Denver's best known songs, his single failed to enter the charts.

"Leaving on a Jet Plane" was re-recorded for the third and final time in 1973 for John Denver's Greatest Hits, the version that also appears on most of his compilation albums.