Where did Elisha lead the blinded Aramean army?

Answer: Samaria

Elisha told the blinded Arameans 'this is not the city' and led them to Samaria, where the LORD opened their eyes.

“And Elisha told them, “This is not the way, and this is not the city. Follow me, and I will take you to the man you are seeking.” And he led them to Samaria.”— 2 Kings 6:19 (BSB)