When going to SXM we are not using miles as I want FC and I want the status miles, which with AA if booking FC you get 150% towards status, note that we earn the miles on their One World Partner Alaska Airlines. Not the same as earning miles, you get those as well but towards airline status levels. I book the least expensive that I can stand the routing while fully expecting that my flights will change and then we tend to get much better routing. Sometimes we have to go days early or late, we can live with that with a smile on our face.
IF booking using miles, we do that the first day that route allows us to book with miles as we would if going overseas where BC or FC is way more expensive. We save our miles for those overseas trips, great value most of the time.
Carol, I had never heard of Going either. I had heard of Scott's Cheap Flights but have never used them. I use Expert Flyer the most, but pay good attention to the actual airline websites as well.