Board Thread:Naruto Discussions/@comment-25278240-20140808192730/@comment-9782468-20140809010034

Well, first off, next time ask your question on the Naruto Answers Wiki. But, since your question is already here, I'll answer it. To the best of my knowledge, at least.

I think Obito needed to teleport to Kamui Dimension before teleporting to a new location in the real dimension. I still think it was pretty fast though, especially considering it had no limits in terms of distance.