UA892 ICN-SFO on Sunday 24 March cancelled due to a warning light on the cabin pressurization system at takeoff. Rescheduled 24 hours later as new flight UA3043. I was told by a passenger on my flight that Monday's UA892 was also cancelled due to maintenance, so at least that 1 passenger from Monday's flight was on my rescheduled Sunday flight. I saw that there was no regular UA892 on the airport screens when we flew out on Monday.

We were put up overnight at the local Howard Johnsons/Days Inn at Incheon, reasonable clean but very small and very spartan rooms. Shuttle provided but no food that day except free hotel breakfast the next morning and a $25 airport food voucher for the next day.

My wife and I were booked in paid business connecting to paid seats in First on the US domestic connection. Because of the rebooking, we got downgrade to economy, not even Economy Plus. I saw open seats in First but we were just put on the standard upgrade list where I was 15th or so because we're just Platinum and not 1K so of course didn't get it. I would think that because we were bumped to this flight and had paid First Class tickets we'd get priority but I guess not.

Not being greedy but what would be fair compensation to expect for this? The loss of the day is a bigger deal as I work for myself and lost a day of work/income.

some other details: UA892 was a scheduled 5:05 PM departure and we taxied out only to have to return to the gate for repair. After a 3 hour delay in our seats we pushed back again and were in line to take off when the pilot announced we'd been ordered to return even though the system was fixed. He wasn't very happy about it. After a bit of a delay we deplaned from the front first and were standing in the jetway when we were ordered back to our seats so the ground crew could coordinate our overnight delay. so back to our seats for another 90 minutes on the plane. We were lucky we got to the hotel early as they deplaned from the front as the check in lines were ridiculously long later. By the time we got to the hotel all restaurants nearby were closed so we had to go to the local convenience store to get something to eat as it was about midnight. Not something I ever want to go through again. The only pluses were the ground staff did as good as job as can be expected and we had a really great FA crew, same crew the next day when we eventually flew out.