Does SWA have ZED agreements with international carriers, if so which ones and how do you list? TIA.

Most of them... but notably, not Air France or British Airways.

Another thing is we can only list economy. Makes you look like a cheap bastard with your economy listing for a long haul to Europe.

Along with no AF or BA, going east we don't have Eva, Singapore, JAL, Asiana, or Korean. Air China or Cathay work.

Are all US carriers available?

Yes. /filler