You will need to access “Deltanet” via the primary pass holder… for an accurate accounting of seats available to pass riders and your chances of obtaining a seat. For those who are not aware, a simple way to quickly check what has been sold to full fare passengers is by checking Deltas main customer web site. move thru the menu directing the flight/flights you want and then click “view seats”.,Albeit; this does not account for other pass riders in the systems vying for that very seat you desire, but it does show a pretty good picture of current “Sold” seats…henceforth an ability to generally manage the date window in which you would like to fly.