Boston, MA to Newark, NJ buses and trains from $49

Or, see buses and trains from Newark, NJ to Boston, MA.
Here are some trips other travelers have found on Routefriend.
$49
3h 58m
0 stops
Amtrak
$70
3h 58m
1 stop
Amtrak Amtrak
$78
4h 51m
1 stop
Amtrak NJTransit