Originally Posted by
catocony
If you take Amtrak, be it Acela or the regular trains, you will have to stop and transfer at Penn Station in NYC. That will add quite a bit of time to the trip.
Originally Posted by
catocony
You might stay on the same train at Penn Station, but it's anywhere from 15 to 45 minutes stoppage.
This is flat out wrong. There is absolutely no reason one needs to transfer at NYP when traveling WAS-BOS, and although there are some outliers, the typical stop at NYP is 15 minutes or less.
Flying is a lot faster, but WAS-BOS on the train, especially on the Acela, can be quite relaxing and enjoyable.