Contradiction with Genesis 5:24
Enoch was taken by God but did not experience death, contrasting with Elijah's unique journey into heaven.
Genesis 5:24: And Enoch walked with God: and he [was] not; for God took him.
Contradiction with Hebrews 11:5
Also mentions Enoch's translation, which some might see as a contradiction to Elijah's supposed uniqueness in being taken into heaven.
Hebrews 11:5: By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God.
Contradiction with John 3:13
Says no one has ascended to heaven, contrasting with the account of Elijah's ascent in 2 Kings 2:1.
John 3:13: And no man hath ascended up to heaven, but he that came down from heaven, [even] the Son of man which is in heaven.
Contradiction with Matthew 11:11
Jesus suggests none born of women is greater than John the Baptist, which might raise questions about Elijah's status and the manner of his departure.
Matthew 11:11: Verily I say unto you, Among them that are born of women there hath not risen a greater than John the Baptist: notwithstanding he that is least in the kingdom of heaven is greater than he.