Catholic University of America to Gettysburg, PA buses and trains from $30

Here are some trips other travelers have found on Routefriend.
$30
6h 19m
1 stop
Megabus Amtrak
$55
7h 25m
2 stops
Megabus Amtrak
$65
3h 55m
1 stop
Amtrak
$85
12h 34m
2 stops
Megabus Amtrak
$181
12h 45m
2 stops
Megabus Amtrak