Long Island University-C W Post to Howard University buses and trains from $43

Here are some trips other travelers have found on Routefriend.
$43
5h 45m
1 stop
Amtrak BoltBus
$50
5h 15m
1 stop
Amtrak GotoBus
$68
6h 51m
1 stop
Amtrak Megabus
$84
4h 0m
0 stops
Amtrak
$112
3h 37m
1 stop
Amtrak Amtrak