Are you talking about domestic or international? Recent or long past flights?
6 months before PanAm closed its doors, my husband and I took one of its mighty 747s to London. Like your DAL flight, it also only had about 20 people on board. I feel sad just thinking about it again, that a great airline like that is now no more.
btw, I still have one of its small bars of soap. Great piece of nostalgia.