Albert Barnes Commentary 2 Chronicles 28:15

"And the men that have been mentioned by name rose up, and took the captives, and with the spoil clothed all that were naked among them, and arrayed them, and shod them, and gave them to eat and to drink, and anointed them, and carried all the feeble of them upon asses, and brought them to Jericho, the city of palm-trees, unto their brethren: then they returned to Samaria." — 2 Chronicles 28:15 (ASV)

Jericho, which lies much farther from Samaria than many points in the territory of Judah, was perhaps selected because the captives had been carried off principally from this location; or because there may have been less danger of encountering portions of Pekah’s army on this route than on the direct one.