You're pretending that is the end of the story - are you not. Did not Elias die. And this isn't a trick question. It is appointed unto men once to die and then the judgement. If Elias had died instead of being spirited to heaven, he would not have been able to return. God works within his laws - not in contravention of them.
I assume you are referring to the Tranfiguration. Of course, such evidence to support your contention would seem problematic. First, because both Elijah and Moses appeared at the Transfiguration -and the evidence clearly seems to indicate Moses died but returned- and second because you have no scripture indicating Elijah dies AFTER the Transfiguration.
Either this, or you are trying to argue John the Baptist was Elijah, which is clearly scriptural nonsense.
Or did you have another argument in mind.