She looked, and not only was there a flight, it left fifteen minutes earlier than my original 7:55 AM flight to DFW, and had masses of space available on it. She gave me an exit row to myself. I even had (just barely) enough time to get some breakfast before boarding.
She wasn't kidding about the flight being empty. First class was completely full -- I suspect because all of the high-end frequent flyers were able to get upgrades. There may have been fewer people in the main cabin than in first class. And so I had the left side exit row (with a DC power outlet) to myself on the Super 80. When we leveled off, I broke out my computer and got what work I could done. (I should have transfered files on which I had been working back in my office to the laptop; I could have got more done.)
Arriving at SFO a little after 10 AM, I got my bags (and had lunch), then got on BART and rode it around to Oakland Coliseum, then rode AirBART into the terminal. Luck continued to be with me, as the shuttle bus for Economy Parking was pulling in just as I got off AirBART. A few minutes later, I was at my van and on the road. I even was able to call in to the conference call that I'd previously declined, to everyone's surprise.
I guess I should have taken BART to the airport after all; it would have saved time overall.
So I got home about two hours earlier than I expected. But I'm so tired that I'm dizzy, so I think a nap is in order now.