The `Runaway` singer reportedly took to the in-flight loudspeaker in the cockpit of the Delta Airlines flight from Minneapolis to New York, where he rapped versions of his hits `The Good Life` and `Gold Digger`.
The famously outspoken rapper reportedly serenaded passengers 30 minutes into the flight, giving edited versions of his tracks, omitting profane language.
A passenger on the flight told website HollywoodLife.com: "I had to pass through First Class to get my seat in Economy, and I saw Kanye sitting there with a little drink in his hand.
"I wouldn`t have even thought it was him, but he was sitting with a very PR-looking lady."
Describing how the star then got up to perform for those on board, the witness continued: "He was like, `Yo, this your n***a, Kanye.
"Then he couldn`t decide if he wanted to do `The Good Life` or `Gold Digger,` so he was like, `I`ll just do a little bit of both.` It was awesome - but I still have no idea how he got into the cockpit."
The witness said what shocked them most, however, was that Kanye didn`t demand preferential treatment upon leaving the plane.
The source added: "He filed out in line with everyone else, and I thought that was pretty cool. Especially for Kanye."
Kanye also posted a message of support to his fans over the weekend, tweeting: "All my fans have really supported me through the dark times and I wanna thank yall for the constant motivation.
"Even when I`m super tired I don`t wanna let yall down... my fans are my family ... FANMILY! (sic)"
Kanye releases his new album `My Beautiful Dark Twisted Fantasy` on November 22.