Here's an example from last year's "Stuck in ZhengZhou" thread, which is how I was able to predict a 4:45 pm departure ahead of time.
ZhengZhou, China 09/24/2013 4:48 A.M. Departure Scan
Incheon, Korea, Republic of 09/24/2013 6:40 A.M. Arrival Scan
Incheon, Korea, Republic of 09/24/2013 10:58 A.M. Departure Scan
Anchorage, AK, United States 09/24/2013 5:09 P.M. Arrival Scan
Anchorage, AK, United States 09/24/2013 6:46 P.M. Departure Scan
Louisville, KY, United States 09/25/2013 12:45 A.M. Arrival Scan
but my 6 came with this route:
Brooklyn, NY, United States 09/19/2014 4:27 P.M. Delivered
09/19/2014 6:18 A.M. Out For Delivery
Jamaica, NY, United States 09/18/2014 10:00 P.M. Departure Scan
09/18/2014 4:21 P.M. Arrival Scan
Louisville, KY, United States 09/18/2014 2:28 P.M. Departure Scan
09/18/2014 10:13 A.M. Import Scan
Anchorage, AK, United States 09/17/2014 7:23 P.M. Departure Scan
09/17/2014 5:02 P.M. Arrival Scan
ZhengZhou, China 09/18/2014 5:15 A.M. Departure Scan
ZhengZhou, China 09/16/2014 7:10 P.M. Arrival Scan
09/16/2014 6:52 P.M. Departure Scan
09/16/2014 5:43 P.M. Location Scan
09/16/2014 3:16 P.M. Origin Scan
China 09/16/2014 5:21 A.M. Order Processed: Ready for UPS