There are only two popular shipping lines (ocean transporters) that own the ships. We have teamed up with Matson. Since we have worked with them for some time now, we get a volume discount that is reflected in your rate.
There are various lines that move cars down to P.R. We have always used Crowley as they are the fastest, the easiest to work with, and provide us a deep discount. This means you even pay less with us than calling Crowley directly.