Schedule changes Oct 27 ex-Calif
 

Appears that the SFO-HKG flight #873 departs at 130am till Oct 26, then Oct 27 departs 1145pm. The LAX-HKG flight #883 appears to change from the current departure time of 1145pm to 950pm. The second LAX-HKG flight, #881, currently departing at 140am will change to a departure time of 1150pm. Better times to be cognizant of that great CX food!

It's because of Daylight Savings Time.

I also thought it was due to Daylight Savings Time but some of the new departures times are more than the matching one hour difference. Nothing drastic, but, at that time in the morning when my #1 priority is not to fall asleep (again) at the gate and miss the flight, every minute helps.

The only problem I see with this is that I work till 10:30 pm. That 1:45 am flight time was perfect. 11:45pm means I leave a day later or fly someone else.

1st the Daylight Savings Time
2nd actually it takes longer to fly from the Westcoast to HKG during winter becos of the strong head wind.

You must realise that Daylight Savings Time causes drastic chaotic changes at airports worldwide.

You're suddenly 1 hour less and all the airlines must reschedule because, say a 1am departure is moved back 1 hour. But what about those airlines which have the midnight departure time? They must be moved around too to accomodate the extra flights from one hour ahead. So that's why CX and other airlines' departure times are shifted around by a few minutes to an hour as air traffic control now have to squeeze in more flights departing within that ONE hour.

Notice the arrival time to HK does not change much.

many countries in the southern hemisphere have daylight savings time as well. so if the u.s. shifts time an hour back and the southern hemisphere city also changes, the flight time would need to change by two hours up north to keep the same arrival time as during the other season. then the return's departure time from the southern hemisphere would then arrive two hours earlier up north and so on and so on.

And on December 16, flight#872 HKG-SFO, appears to have a new departure time of 1145PM, arriving same day in SFO at 720PM. Usually this flight departs around 445PM, arriving same day around 230pm.