Board Thread:Naruto: The Last Discussion/@comment-25824723-20141207101850/@comment-25414124-20141209024422

ItachiWasAHero wrote: Not necessarily, Onoki could have taught him how to fly before the movie started.

If that were true then Naruto would be able to use dust release. I'm not gonna spoil any big details but I read what happens in the movie. Unfortunately, Kishimoto targeted it to mainly NaruHina fans as seen in the trailer so he most likely forgot the small details since he focused on NaruHina.