I had one of those two days ago. Status said: "A plane change occurred this morning because of maintenance-related schedule distributions in Denver. Your new plane is supposed to arrive from La Guardia at 2:09 PM. We are sorry for the inconvenience".
They can be sorry but not sorry enough to make sure that you get your connecting flight. UA delivered me one hour and 8 minutes late in ORD. I ran all the way from Gate C11 to Gate F27. Missed the 15 minutes deadline by 1 minute so found the door closed. I wished that they had sent me a notification when they offloaded me, I would have stopped running. In total, there were 5 passengers from the DEN flight that did not make the connection to my destination.
Last edited by StuckinITH; Oct 18, 2018 at 7:03 am
Reason: Typo