American University to Salisbury University buses and trains from $80

Or, see buses and trains from Salisbury University to American University.
Here are some trips other travelers have found on Routefriend.
4h 10m
2 stops
Amtrak Greyhound
3h 10m
1 stop
4h 4m
2 stops
Amtrak Greyhound
9h 10m
2 stops
Megabus Amtrak