Detroit, MI to Northwestern University buses and trains from $33

Or, see buses and trains from Northwestern University to Detroit, MI.
Here are some trips other travelers have found on Routefriend.
$33
5h 19m
0 stops
Amtrak
$43
7h 58m
1 stop
Amtrak
$69
7h 15m
1 stop
Greyhound Amtrak
$79
8h 57m
2 stops
Greyhound Amtrak