Which openings offer the best chances to reach an endgame quickly? If you are strong at endgames, which openings are favorouble for you 
 because they tend to lead quickly to an endgame ?
The Berlin comes to mind. 

White can avoid this famous endgame, but only at the cost of relinquishing any prospects for an opening advantage. 

Generally I have a hard time coming up with openings leading to endgames. There are rather variations within openings that are endgame prone. 

To find variations like the Berlin I advice you to look at the games of Ulf Andersson. He is famous for going into the endgame as quickly as possible.