International service is highly unlikely with Southwest for the near future. It's not that their equipment can't handle it, the hassles of dealing with international formalities can really slow down the flights and delay those quick turnarounds. Southwest keeps their planes flying since they're not making money sitting on the tarmac, hence the high frequencies and quick turnarounds. Besides, they are doing very well with what they're doing right now and they're now going into a hub, PHL
, which might be a sign of what they're going to do next.