United Airlines recently announced that they are pulling out of JFK and adding additional service from Newark to both San Francisco and Los Angeles. This service will be on 757 aircraft with lie flat beds in business class.
The airline has just loaded the award space into their calendar and it appears that there is wide open award availability on these routes. United charges 25K miles one-way for these seats domestically and their partners should have access to these award seats as well.
For more information about booking with partners, Hawaii routes and utilizing stopovers, see this Dan’s Deals post.