Cambridge, MD to Post University buses and trains from $184

Here are some trips other travelers have found on Routefriend.
$184
11h 39m
2 stops
Amtrak Metro-North
$186
8h 58m
2 stops
Amtrak Metro-North
$191
10h 10m
2 stops
Amtrak Metro-North
$195
8h 58m
2 stops
Amtrak Metro-North
$?
12h 10m
3 stops
Amtrak Metro-North