Originally Posted by
infinitium
...There was another SouthWest flight that also left around that time. It departed from a faraway gate. Asked UA's agent-on-demand if I could be booked on that into SFO, but was told No. (Assume it's because SouthWest isn't part of *A and therefore that airline isn't on UA's available-partners-to-rebook-affected-passengers list?)....
That was a good option if you could have gotten to it (and if you didn't check a bag w/ United). Southwest is a loner - you would have had to buy a walk-up ticket at the gate.