Harrisburg, PA to Teachers College at Columbia University buses and trains from $33

Here are some trips other travelers have found on Routefriend.
$33
6h 39m
1 stop
GotoBus Metro-North
$64
3h 55m
1 stop
Amtrak Metro-North
$66
6h 19m
2 stops
Amtrak Metro-North
$71
6h 52m
2 stops
Amtrak Metro-North
$89
6h 16m
2 stops
Amtrak Metro-North
$102
8h 57m
2 stops
Amtrak Metro-North
$115
8h 22m
2 stops
Amtrak Metro-North