What does it mean when a previously available seat map in the fare search is no longer available? In particular, my family and I are travelling Den-Koa (upgraded first class) in July. Originally listed as 757 LAX-KOA, but when checking now they show flight number, but no aircraft type and seat map is not available under the "Select Seats" button. Are they in the process of changing aircraft types? Last time I checked (a couple of days ago) it showed only 1 seat availble in coach under Seat Selection. I hope they are upgrading to something larger. Thanks for any info.