Washington, DC to Johnson & Wales University buses and trains from $37

Or, see buses and trains from Johnson & Wales University to Washington, DC.
Here are some trips other travelers have found on Routefriend.
8h 34m
1 stop
GotoBus Greyhound
5h 42m
0 stops
8h 34m
2 stops
Amtrak Greyhound
7h 21m
1 stop
Amtrak Amtrak