Check the seatmaps on NWA.com and read the lists of seat numbers beside the plane drawing.
You will be able to see seats that will not be available until probably gate time and if no one requests them could end up going to "standbys" FOR EXAMPLE SEATS FOR DISABLED
AND SEATS FOR BASSINETS> The seating charts at NWA show these.. At DL they do not and I do not think CO seatmaps show them either.