One thing I noted DL having "zero" availability is that his table obviously has many mixed awards, meaning they are "saver" for half of the trip. This is something that DL has just started allowing and should help bring the average mileage required down somewhat. In addition, I feel like if he was able to find SkySaver seats one way, he could probably eventually find SkySaver seats the other way for at least some of those trips by playing around with the routing or talking to an agent.

I also found it very interesting that DL claims to have already given away 18% of J seats on ATL-FCO for this summer at Saver levels.