The only times Clark has flown in this series were when he was conditioned by Jor-El back in season three I believe, end of season two. He was in full Kryptonian mode. The other times we've seen him "fly" he's just using his super speed. I must say that modified Returns costume looks okay. It still makes zero sense for Jor-El to have zapped it to the Fortress making Clark EARN it. He should earn it for himself, not because his simulcrum tells him to. This is a core fundamental flaw that the series has had in my view. Clark should gradually choose his "destiny" rather than be forced into it by others. It's an aspect of this take on the mythos that I'm vehemently against.