User blog comment:Miskos3/Fairy Tail Chapter 486: The Fourth Guest, Review/@comment-24277053-20160523141935/@comment-7418318-20160526090003

Natsu is more than a full day of travel away, even on Happy he can't make it in time.

And considering his teleporting around of Wendy in the Tartaros arc, I'd say he can't make that distance in time either, unless he seriously improved either his range or how many teleports he can chain together after each other.

Not to mention that he doesn't have a clue what's going on up north and he's facing August, so he's a big busy.