Here's a doozy. UA2319 SFO-EWR on the 781 just took a 5 hour delay, from 2 to 7 pm. Apparently there was "environmental damage" which I take to mean a strike.
Absolutely no confirmable alternative options. Everything is standby. No apologies from UC staff - attitude is "tough luck."
I remember when UA used to keep spare aircraft at hubs.
ETA: They are bringing in a new aircraft from LAX:
