An interesting piece of research by FrugalTravelGuy showing flights available to Hawaii on certain airlines

" Here are the number of days two seats are available for first class awards at the lowest award level: United 100K, American 75K, Continental 90K, Delta 75K.

December: American departures 6 American returns 3
United departures 11 United returns 29
Continental 15 Continental returns 27
Delta departures 0 Delta returns 0

November American 10 days out and 12 days return
United 19 days out 23 days return
Continental 19 days out and 10 days return
Delta 0 days out and 0 days return

October American 0 days out and 9 days return
United 21 days out and 20 days return
Continental 14 days out and 5 days return
Delta 0 days out and 0 days return "

Not exactly a ringing endorsement for the Skymiles program