Brown University to Yale University buses and trains from $38

Or, see buses and trains from Yale University to Brown University.
Here are some trips other travelers have found on Routefriend.
$38
1h 21m
0 stops
Amtrak
$47
2h 58m
1 stop
Amtrak Metro-North
$47
3h 7m
1 stop
Amtrak Metro-North