Franklin and Marshall College to Catholic University of America buses and trains from $23

Here are some trips other travelers have found on Routefriend.
$23
5h 10m
1 stop
Amtrak Megabus
$54
3h 12m
1 stop
Amtrak
$59
7h 10m
2 stops
Amtrak Megabus
$81
8h 25m
1 stop
Amtrak GotoBus
$122
13h 25m
2 stops
Amtrak GotoBus
$140
6h 58m
1 stop
Amtrak Amtrak