As Rey is boarding the Millenium Falcon she and Kylo see each other again in the same way they had been throughout the movie.
We know that Snoke was the one connecting them since Kylo did not know how and he said it would have killed Rey for her to have done it.
Since Snoke is
dead at the end of the film
How is it still possible for them to have still been connected?
There is no canon information yet on how this is possible. Only fan speculation so far.
The possible theories (none of which have canon confirmation) are:
Snoke was required to establish the connection. Once established, it does not require either his skill in the Force, or his power, to maintain (think of it as drilling through a wall - once you expend the effort to make the hole, you have that hole forever).
Snoke isn't actually dead.
This is less likely since the whole thematic strategy is to kill off all that made Star Wars good... err "old things" :P
Snoke just used Rey's and Ben's innate Force strength in the first place (and lied to them).
Think about it like that. Snoke made the connection possible when they both were halfway across the Galaxy. In the end of the movie Kylo Ren and Rey are one the same planet and not that far apart. So in my mind Kylo Ren simply reached out to Rey and due to the very short distance between them he has no problem doing it.
