Does Saitama have enhanced senses? So Saitama jumped and appeared at King's apartment in floor 22th. How did he know King was there? Does Saitama have enhanced vision, hearing or something?
yes he had according to his wikia he possessed the superhuman strength https://onepunchman.fandom.com/wiki/Saitama 

Immense Senses: Saitama's senses are far beyond the human norm. Nevertheless, Saitama's senses do not have the same degree of 'resolution' as some of Genos' sensors, which can detect and distinguish foes at a greater distance. Even so, he does possess impressively sharp hearing, being able to pick up on various chatter from bystanders a good distance away even while fighting monsters and the like.