Originally Posted by
Blumie
The information you posted, twice, was just flat out wrong. Yes, there are some trains travel only travel from WAS to NYP, but the vast majority travel WAS-BOS with only a short stop at NYP (albeit not as short as at most stations). And if you're traveling from WAS to BOS, you would never transfer at NYP as you'd just be transfering to a different train that originated at WAS.
If you book your WAS-BOS on Amtrak online (as I would imagine the vast majority of people do these days) Amtrak will *never* offer a WAS-BOS trip that requires transferring in New York Penn Station. Every single trip offered will be on a single train that will allow you to stay on the train at NYP.
The only way you'd end up with a WAS-BOS trip requiring you to transfer at NYP is if you deliberately book two different trips, one from BOS to NYP and then another from NYP to WAS. If you search for a BOS-WAS or WAS-BOS trip you will only get single trains.