Argosy University-Washington D.C. to Stamford, CT buses and trains from $35

Here are some trips other travelers have found on Routefriend.
$35
6h 51m
1 stop
Vamoose Metro-North
$37
5h 24m
1 stop
GotoBus Metro-North
$39
5h 46m
1 stop
GotoBus Metro-North
$42
6h 51m
1 stop
GotoBus Metro-North