Depends on how you look at it. The flaming chariots and angelic beings Ezekiel saw in the sky were "UFO's"
I would encourage you to think about what you are saying.
Ezekiel 1, after describing “a likeness with the appearance of a man” on a throne, Ezekiel wrote:
“This was the appearance of the likeness of the glory of the Lord” (1:28).
Then, a few verses later in chapter 2, this same person said to Ezekiel,
“Son of man, I am sending you to the children of Israel, to a rebellious nation that has rebelled against Me” (2:3).
Ezekiel fully understood this to be the Lord talking to Him, that the vision was of spiritual beings, and that he had not had an encounter with an alien from outer space.
If you think that Ezekiel saw a UFO then Ezekiel was a liar.
Ezekiel 1:4 ........
"And I looked, and, behold, a whirlwind came out of the north, a great cloud, and a fire infolding itself, and a brightness was about it, and out of the midst thereof as the colour of amber, out of the midst of the fire."
Now if what he said he LOOKED and saw was a lie, then everything else he said God told him to say would also be considered a lie.
But with a little research into the biblical message, it becomes clear that Ezekiel’s writing and visions were apocalyptic in nature—very similar to the writings found in both Daniel and Revelation.
The visions Ezekiel described are of heavenly, spiritual beings, not “alien life forms.”
By comparing the description of the living creatures in Ezekiel to that of the living creatures that surround the throne of God in Revelation 4, one quickly realizes that the scenes witnessed by Ezekiel, John, Daniel, and other inspired writers were visions of God and His spiritual host of heaven.
Ezekiel did not see a UFO! He was allowed the special privilege of being called by God through an amazing vision of the heavenly host. His description of the vision ties in perfectly with other apocalyptic writings such as Daniel and Revelation.
IF you are looking for the long-absent evidence proving the existence of aliens and UFOs, will have to look some place other than Ezekiel for it.