In general, the phrase "(화)살을 날리다" means to fly(shoot) an arrow (화살을 쏘다).
살을 날리다, to fly(shoot) an arrow
돌을 날리다, to fly(throw) a stone
연을 날리다, to fly a kite.
Whereas, the homonym 살(煞) refers to a term, "murderous force/look" in Korean tradition shamanism.