This one is weekday and to get best price and upgrade shots you need to overnight. Now if you are willing to pay more you can redeye on the non-upgrade via JFK. Maybe the same price as hotel but I would rather overnight. Here are the numbers:
6,222MQMs at under 4.3CPM
Bookable on Delta.com
DM yields a very sweet 14,000 Skymiles per CWSI.net!
This does work the other way too so if near PHL this could work. Have a NYC run the way soon from a reader btw!