There are no nonstops from SXM to Orlando. The best CONNECTION into Orlando is probably going to be Jet Blue, through San Juan. The AA flights generally are not lined up, in terms of the time, to make sense, as they usually involve really long layovers.
Like I said, it's a connection through San Juan, but for Orlando, that seems to be about the best connection, if you are talking specifically Orlando. For us, we usually just book the non-stop from Miami and then drive from there, even though Orlando is closer to us than Miami. You can also fly Delta through Atlanta, but actually not sure if you can connect to Orlando on Delta, or only to Tampa.