They share common reservations systems, so, it wouldn't surprise me if SABRE or another GDS shares no-fly lists. I seem to recall that American, United, and De

They share common reservations systems, so, it wouldn't surprise me if SABRE or another GDS shares no-fly lists. I seem to recall that American, United, and Delta all use/implement Sabre in some form or another, and possibly shared a no-fly/ban list...but, my memory is a bit hazy on that.