I am having trouble booking reward travel on Northwest. I am trying to get 4 people to Hawaii from Detroit next June, and if I go into the NW website, Reward Travel Reservation, they show 2 separate flights with 2 FC seats available leaving June 1 and returning June 14. I have called the CO elite line twice and they say they do not show availability for any seats on NW DTW->HNL for anytime in the month of June. Does NW only release a certain percentage of seats to CO for rewards travel? Or do they only release seats, say, 6 months before the travel date? Or 30 days before the travel date? Or am I just out of luck?

Thanks for your help!