SUNY Empire State College to Columbia University in the City of New York buses and trains from $64

Here are some trips other travelers have found on Routefriend.
$64
4h 42m
1 stop
Amtrak Metro-North
$64
4h 10m
1 stop
Amtrak Metro-North
$125
6h 52m
2 stops
Amtrak Metro-North