Two data points from a weekend trip to San Francisco:

- AS PDX - SFO flight (09:55 scheduled departure) was diverted to OAK. I woke up on Saturday morning to a text that our flight would be operating into OAK instead and that ground transportation would be available on a complimentary basis for those needing to get to SFO. Needless to say, we took BART into the city instead.

- VX SFO - PDX flight (20:45 scheduled departure) was delayed two hours. From listening to some of the chatter at the gate, it sounds like one of the AS SFO - PDX flights was moved to SJC.