New Orleans, LA to Denver, CO buses and trains from $142

Here are some trips other travelers have found on Routefriend.
$142
1d 5h
2 stops
Greyhound
$243
1d 18h
1 stop
Amtrak
$154
2d 5h
4 stops
Amtrak Greyhound
$188
1d 8h
2 stops
Amtrak Greyhound
$386
1d 23h
3 stops
Greyhound Amtrak