State College, PA to Washington, DC buses and trains from $59

Or, see buses and trains from Washington, DC to State College, PA.
Here are some trips other travelers have found on Routefriend.
11h 4m
1 stop
GotoBus Vamoose
13h 49m
1 stop
GotoBus GotoBus
8h 58m
1 stop
GotoBus Amtrak