Mass arrivals from Asia at PANC start at around 11am AKDT (Noon Pacific) and run for a few hours. The Watch is reportedly being assembled at Quanta Changshu, which would make Shanghai Pudong (PVG) the port of embarkation.
As with the iPhone launch, a connection may happen at Seoul (ICN) as there are several regional flights moving freight from PVG to ICN - Apple has used a combination of UPS, FDX, Polar, and KAL in past launches.
So Watches could possibly be on any of today's arrivals:
QFA7521 B744 Shanghai Pudong Int'l (ZSPD / PVG) Wed 20:08 CST Wed 11:28 AKDT
PAC916 B744 Incheon Int'l (RKSI / ICN) Wed 22:23 KST Wed 12:11 AKDT
UPS99 MD11 Incheon Int'l (RKSI / ICN) Wed 22:17 KST Wed 12:16 AKDT
CKK225 B744 Shanghai Pudong Int'l (ZSPD / PVG) Wed 21:01 CST Wed 12:22 AKDT
FDX5924 MD11 Incheon Int'l (RKSI / ICN) Wed 22:39 KST Wed 12:35 AKDT
PAC998 B744 Shanghai Pudong Int'l (ZSPD / PVG) Wed 21:16 CST Wed 12:37 AKDT
KAL275 B772 Incheon Int'l (RKSI / ICN) Wed 22:27 KST Wed 12:47 AKDT
UPS81 B744 Shanghai Pudong Int'l (ZSPD / PVG) Wed 21:31 CST Wed 12:49 AKDT
KAL285 B744 Incheon Int'l (RKSI / ICN) Wed 22:59 KST Wed 12:56 AKDT
AAR587 B744 Incheon Int'l (RKSI / ICN) Wed 23:05 KST Wed 23:18 KST Wed 13:04 AKDT
KAL9277 B744 Incheon Int'l (RKSI / ICN) Wed 23:10 KST Wed 23:21 KST Wed 13:18 AKDT
KAL213 B748 Incheon Int'l (RKSI / ICN) Wed 23:20 KST Wed 23:32 KST Wed 13:22 AKDT
AAR238 B744 Incheon Int'l (RKSI / ICN) Wed 23:05 KST Thu 02:53 KST Wed 13:25 AKDT
KAL233 B744 Incheon Int'l (RKSI / ICN) Wed 22:40 KST Wed 23:52 KST Wed 13:42 AKDT
CAO1079 B77L Shanghai Pudong Int'l (ZSPD / PVG) Wed 23:10 CST Wed 23:09 CST Wed 14:23 AKDT