To find R space (not RN, RN is not an active fare bucket) for the long-haul you have to search segment by segment (EWR-HNL, ORD-HNL, IAD-HNL). If you search from CHS, that will almost certainly invalidate the result.

That said, researching now for flights in 2017 is IMO pointless. No one knows what the program will look like 18 months from now.