Consider these references to "heaven":
… The mule went under the thick boughs of a great terebinth tree, and his head caught in the terebinth; so he was left hanging between heaven and earth.
— 2 Samuel 18:9
Now it happened in the meantime that the sky[heaven] became black with clouds and wind, and there was a heavy rain. …
— 1 Kings 18:45
And it came to pass, when the LORD was about to take up Elijah into heaven by a whirlwind, …
— 2 Kings 2:1
… and Elijah went up by a whirlwind into heaven.
— 2 Kings 2:11
When the heavens are shut up and there is no rain, …
— 2 Chronicles 6:26
When I shut up heaven and there is no rain, …
— 2 Chronicles 7:13
He caused an east wind to blow in the heavens; …
— Psalms 78:26
The dead bodies of Your servants They have given as food for the birds of the heavens, …
— Psalms 79:2
They all use the same Hebrew word, שָׁמַיִם — šāmayim – heaven(s), and they all refer to something happening in the air.
There is no reason to think that any of them meant anything other than the Earth's atmosphere (birds, wind, rain, clouds, …).
There is no reason to think that when Elijah went up by a whirlwind, he went anywhere higher than a whirlwind could go; not into space, and certainly not to God's heavenly home.
He was simply taken to some other location on Earth.
That is especially obvious when one realizes that Elijah was heard from again, several years later (2 Chronicles 21:12).
See my answers to How can John 3:13-14 be reconciled with what happened to Enoch, Elijah and Jesus? and Did God resurrect Moses?:
Elijah was moved by God, but physically from one location to another on Earth.
Whirlwinds exist only in the first heaven (Earth's atmosphere). Space is the second heaven, and God's throne is in the third heaven (2 Corinthians 12:2).
Years after this event, King Jehoram received a message from Elijah (2 Chronicles 21:12, proving that Elijah was still alive here on Earth:
- Elisha takes on Elijah's mantle. (2 Kings 2:15)
- People believe Elijah can be found on Earth (2 Kings 2:16)
- Elisha talks to King Jehoshaphat (2 Kings 3:11)
- Jehoshaphat is succeeded by his son Jehoram (2 Kings 8:16)
- Jehoram receives letter from Elijah (2 Chronicles 21:12)