How far back does flightaware go? Flightly performance for the past 60 days/35 flights has it at 86% early and 3% on time. It was late 11% of the time but no cancellations in this time period.

As for irrops options, there is also SYD/MEL/AKL-SFO. If the inbound SFO-BNE is cancelled you'd likely have good advance notice for rerouting.