We are flying sw and most of our flight on sw was early morning. We are departing St. Louis tomorrow @5:40 and our flight is coming from Salt Lake City to Phoenix then St. Louis. I have checked to see if there at any available to purchase and there are some in salt lake but none in Phoenix. We have 5 of us this time that would prefer to sit together. Is there a way to find out how many passengers will be staying on before we board. We have A57 thru B1 B-passes.