Duh, new Ipad owner here, how to watch movies without internet

I will be traveling by plane, no wifi, need to watch tv shows or movies, have Netflix, Hulu, Amazon, but all require wifi, so I would have to download something?

Prefer tv shows, willing to pay, how do I do this?

this is ipad 101 I am sure but new to me, thus the duh

ok, nothing, so you are saying i can go to itunes, buy an episode of whatever show, then download it, i am doing that on amazon instead only because that is where i started

thanks