I got excited in seeing this comment, but I just searched across the year ahead and found only one date with a reward seat in United Polaris from BNE to SFO. It's available for booking using both Velocity Points and KrisFlyer miles (much better value via Velocity at 95,500 points versus 146,500 SQ miles for the same). Haven't checked SFO-BNE though, if there might be more on that AU-bound leg.
