Look for next UPS update around midnight. UPS is efficient in transporting and figuring out delivery times so you can be 99% assured your iphone will be delivered on the date quoted.
Flight 99 is due to land shortly before 1am Louisville time, and the planes taking off to go out to the regional hubs will leave around 3am Louisville time, expect your updates then.
What I don't get is flight 982 lands at Boeing Field at around 5am, which is plenty of time to put it on a truck for Wednesday delivery, so why is UPS saying Thursday? I have a sneaking feeling my phone may take another one-day vacation in Louisville.