Albert Barnes Commentary 2 Kings 2:1

"And it came to pass, when Jehovah would take up Elijah by a whirlwind into heaven, that Elijah went with Elisha from Gilgal." — 2 Kings 2:1 (ASV)

The events of this chapter are related out of their chronological order. Elijah’s translation did not take place until after the accession of Jehoram in Judah (2 Chronicles 21:12), which was not until the fifth year of the reign of Jehoram of Israel (2 Kings 8:16). The writer of Kings, having concluded his account of Elijah’s ministry in chapter 1 and being about to move on to the ministry of Elisha in 2 Kings 3, thought it best to insert the final scene of Elijah’s life at this point, even though it did not occur until several years later.

Gilgal – The modern Jiljilieh, on the highland between Nablus and Beitin (Bethel) and about eight and a half miles from the latter, is now commonly believed to be the Gilgal mentioned here. Some regard it as the ordinary residence of Elisha (2 Kings 4:38).