Calvin College to University of Illinois at Chicago buses and trains from $31

Here are some trips other travelers have found on Routefriend.
$31
3h 57m
0 stops
Amtrak
$33
4h 27m
1 stop
Greyhound Amtrak
$61
8h 28m
3 stops
Greyhound Amtrak
$61
1d 15h
3 stops
Greyhound Amtrak